Transcription
1 EnCal 3000 Controller Technical Documentation Function, Operation, Commissioning and Maintenance 2008 Elster GmbH 2008/2013
2 Copyright: 2008 Elster GmbH GAS-WORKS and FLOW COMP are registered trademarks of Elster. Microsoft, Windows and Windows NT are registered trademarks of Microsoft Corporation. HART is a registered trademark of HART Communication Foundation. Elster GmbH Schloßstraße 95a D Dortmund / Germany Tel.: +49 (0) Fax: +49 (0) systems@elster-instromet.com page ii EnCal 3000
3 Contents General Notes on the Structure of this Manual... v Safety and Warning Notes... v 1 Introduction The EnCal 3000 Gas Quality Measuring System The EnCal 3000 Controller The gas-net System Idea Device View and Design Operating the Device Primer for Impatient Operators: What do I have to do to view the process values of the second stream in case of a dual-stream EnCal 3000 Controller? view the error listing of the Gas Quality module? accept gas quality errors? to view the software versions? to view the device configuration? checking all parameter settings? view archives? Functional Description Gas Quality Module(s) Data Logging Module Monitoring Module Integrated RDT Module System Module DSfG Module, Data Exchange Module GW-GNET Creating and Exporting a Parameter Data Record: Brief Description Importing and Editing a Parameterization: Brief Description Extras: GW-GNET+ Service Programs Installation Mounting the EnCal 3000 Controller Connecting the Lines Commissioning Parameter Protection against Unauthorized Access Parameterization Commissioning the Integrated RDT Maintenance Battery Replacement Technical Data: EnCal 3000 Controller Annex EnCal 3000 page iii
4 11.1 Error Listing of the Gas Quality Module Menu Structure of the EnCal 3000 Controller Certificate of Conformity ATEX Certificate EXMFE ATEX Certificate EXDE Bibliography Index page iv EnCal 3000
5 General Notes on the Structure of this Manual This documentation describes the function, operation, commissioning and maintenance of the EnCal 3000 Controller. This controller is part of the EnCal 3000 Gas Quality Measurement System, which also consists of the EnCal 3000 Gas Chromatograph (GC). When mentioned within this documentation, EnCal 3000 or controller always refers to the EnCal 3000 Controller. Tip: Chapter 4 provides brief instructions on how to accomplish regular tasks during routine tests in the station. It is intended for the impatient reader who does not want to read the entire manual first just to accept an error. It is, however, necessary to read the entire manual to comprehend the device s mode of operation. Three manuals describe the EnCal 3000 gas quality measuring system: The manual on hand deals with the controller. The other two manuals deal with the hardware and the PC parameterization software of the gas chromatograph. The entire Technical Documentation must always be at hand in the station.! Safety and Warning Notes Attention! The following safety and warning notes must be observed at any rate: The EnCal 3000 Controller must neither be stored at temperatures below -20 C nor above +50 C. A temperature between 0 C und +40 C must be guaranteed during operation. The EnCal 3000 Controller must be installed outside hazardous area 2 as it is not an explosion-proof device. The EnCal 3000 Gas Chromatograph, however, is explosion-proof. The EnCal 3000 Controller can be equipped with hardware modules that are approved as associated electrical apparatus of category ib according to DIN EN with intrinsically safe circuits (EXMFE5 / EXDE6 input boards). It is therefore suitable for being connected to sensors, signal transmitters and pulsers located in hazardous areas (e.g. zone 1). It is not permitted to connect intrinsically safe and non-intrinsically safe circuits to these modules together. The power supply of the EnCal 3000 Controller is 24 V DC and must be secured externally by 1 A. Connect the earthing to PE of the power supply socket for equipotential bonding. Observe the regulations of the relevant standards, in particular the regulations of DIN EN 50014, DIN EN and DIN EN Observe the limit values stated in the respective certificates of conformity of the boards to be connected. (Please refer to the annex for the certificates of conformity.) Warning: This is a Class A device that may cause interferences in living areas; you may be asked for appropriate measures at your expense if the device is installed in such areas. EnCal 3000 page v
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7 1 Introduction 1.1 The EnCal 3000 Gas Quality Measuring System The basic configuration of the EnCal 3000 gas quality measuring system consists of the EnCal 3000 Gas Chromatograph and the EnCal 3000 Controller (see Figure 1 below). When running EnCal 3000 Quad is the meter is in two cases and can contain up to four analytical channels. (see Figure 2 below). The gas chromatograph s measuring technology performs the analysis independently. You can install further controllers as an option. The subsystems communicate via Modbus with each other, with one controller being the active unit (Modbus master) that controls the gas chromatograph (Modbus slave). The two optional controllers act as passive units (Modbus listeners), i.e. they also read the communication at the Modbus and extract the data relevant to them, but they do not send and process any commands. The controllers serve as displays and data logging devices within the EnCal 3000 measuring system. As active unit the controller also serves as control element for the gas chromatograph. It is therefore used to perform manual calibrations or test gas runs. As an option the EnCal 3000 Controller provides a hydrocarbon dew point calculation derived from the ISO standard and based on a C9+ analysis of the EnCal 3000 Gas Chromatograph. The gas quality measurement system EnCal 3000 is described in 3 manuals This manual deals with the controller. Two other manuals are devoted to the hardware and the PC configuration software of the measuring element. EnCal 3000 page 1
8 Gas Chromatograph Controller active unit e.g. stream 1, 2 V.24 serial PC for parameterization parameterization: gas chromatograph: RGC 3000 controller: Gasworks Modbus ASCII/RTU (RS232/485) Modbus TCP (ethernet 10Base-T) Controller (optional) passive unit e.g. stream 3, 4 V.24 serial Controller (optional) passive unit e.g. stream 5 V.24 serial ethernet 10Base-T Figure 1 Figure 2 page 2 EnCal 3000
9 1.2 The EnCal 3000 Controller The EnCal 3000 Controller is part of the gas quality measuring system. Each controller can process one or two gas streams, while it is also possible to assign one gas stream to several controllers. This makes it possible, for instance, to distribute the data of one gas stream to several DSfG buses. The EnCal 3000 Controller indicates the calibratable measurements superior heating value Hs, standard density rho and the mole fraction of the gas components in the basic display of the operator panel. The font size of these measurements is twice as large due to their significance. The EnCal 3000 Controller automatically invokes this basic display again 30 minutes after the last device operation. The basic display shows the measurements of the first assigned gas stream in dual-stream operation. You can switch to the corresponding display of the second assigned stream with a menu command. The EnCal 3000 Controller is also equipped with a data logging function that logs important measurement variables. A Long-term archive is available as a certifiable archive type, which logs the calibratable measurement variables cyclically every 15 minutes. There is one separate certifiable Long-term archive available for each gas stream. The data logging function logs the measurements provided by the gas chromatograph. It is also able to log further measurement variables provided by operational supplementary functions. The measurement variables to be logged are provided with a time mark of the data logging time and a classification criterion, the ordinal number. They are saved in a storage area that is organized as ring storage. If the ring storage is full, each new data record overwrites the oldest one. If the controller is the one taking on the active function within the Modbus communication with the gas chromatograph, it can also be used to perform manual calibrations or test gas runs. In addition to the displaying and data logging function the EnCal 3000 Controller offers a variety of operational supplementary functions; for instance, for monitoring tasks and data communications. The certifiable functions are isolated from each other and from the operational functions. The controller monitors itself and all incoming measurements. If it detects an internal error or an error in the communication with the gas chromatograph and if this error affects the accuracy of the measurement variables, this error will be indicated by a red flashing status LED and additional clear text. During such an error the last two measurements measured before the error will be maintained. After the error has been eliminated, the EnCal 3000 Controller switches automatically back to the current online values. The EnCal 3000 Controller is equipped with up to two digital data interfaces of the DSfG type (DSfG stands for Digital Interface for Gas Metering Device), which is used by all devices in the Elster gas-net device family as described below. The controller uses the interface labeled DSfG to provide other measuring instruments connected to the DSfG multidrop connection and typically calibrated (e.g. flow computers) with the calibrated target variables Hs, rho and the entire analysis. For this, the EnCal 3000 Controller operates exactly according to the method specified by the DSfG regulations. If new measurements are available, the EnCal 3000 Controller sends a New measurements attention telegram. Data sinks being interested in the values due to this signal have to get hold of these values by themselves by means of query telegrams. In the EnCal 3000 Controller the transferred calibrated data is provided with an additional signature, which is checked for integrity in the receiver. This procedure ensures the accuracy of the transferred data. EnCal 3000 page 3
10 1.3 The gas-net System Idea is the generic term for an Elster device family. All gas-net devices, including future device types, are characterized by uniformity in appearance, operation and parameterization. Each gas-net device always covers a multitude of measurement and control functionalities. EnCal 3000 Controllers also provide this functional variety. To keep the operation and parameterization of the devices well-structured and user-friendly, the gas-net series is based on a modular concept. A module corresponds to a special functionality. Each module has its own main display within the device s menu assistance, and each module has its own group of settings within the parameter data record. A particular module can be employed in different device types. This yields a modular system that is advantageous to the user as a particular module can always be operated and parameterized in the same way, no matter in which device type it has been installed. page 4 EnCal 3000
11 2 Device View and Design The housing of the EnCal 3000 Controller is designed as plug-in unit for a 19 frame and is usually available in two housing sizes, i.e. with a mounting width of 1/3 for up to four process boards or a mounting width of 1/2 for up to seven process boards. The version number and check sum for identifying the software update are directly invokable via the main display of the System module. The device front includes one 8x32 character-lcd, one keypad with 16 keys, one status LED and the calibration switch. The DSS data interface is also located on the device front. It serves the connection of a PC for servicing purposes. The following illustration shows, as an example, the front view of the EnCal 3000 Controller in the narrow design with a mounting width of 1/3: EnCal 3000 main plate of the gas quality measurement unit, stuck on. Device EnCal 3000 Year of man.... S/N:... [8x32 signs LC-Display] gas analyzer Status LED Data interface DSS DSS Status Cal.- switch Calibration switch open close Keypad In addition to the 24 VDC mains connection up to two of the following interfaces are located on the back of the device: DSfG interface COM2 interface: Intended for connecting the modem for the integrated RDT. Alternatively suitable for connecting proprietary protocols (Modbus RTU, Modbus ASCII, RK512 or 3964R) TCP/IP for integration in a standard network installation (for data exchange via Modbus TCP or time synchronization via NTP) All process connections are implemented via process boards installed in the housing. The exact composition of the I/O boards depends on the tasks of each individual device (single- or multi-stream gas quality measurement, number of required output signals, etc.). Gas quality measurement is the main functionality of the EnCal 3000 Controller. For connecting the EnCal 3000 Gas Chromatograph via Modbus TCP the device has to be equipped with a TCP/IP module. The following process board is only necessary for connecting the EnCal 3000 Gas Chromatograph via Modbus serial (RTU or ASCII): A multi-functional serial MSER2 interface board. Even if more than one stream is measured, the device is only connected via one protocol channel of the board. EnCal 3000 page 5
12 The overview below shows the typical board assignments for different operating modes. Operating modes (OM): 1 Modbus TCP, connection of gas chromatograph (GC) via TCP/IP interface for single- or dual-stream operation 2 Modbus RTU/ASCII, connection of gas chromatograph (GC) via serial interface for single- or dual-stream operation Unassigned board locations (BL) may contain any gas-net process boards for operational purposes. A description of the currently available boards is provided in Chapter or in Chapter 10 Technical Data. Board locations 5 to 7 are only available in case of a 1/2 mounting width. BL OM 1 TCP/IP interface module required 2 MSER2 (RS232/485) The illustration below shows a typical rear view of a device in the narrow design for operating mode 2 as described in the table above. Process card (board) MSER2 in slot 1 as standard. Further board configuration and overview of connections to be secured officially, refer to document no Document no shows how the connections have to be secured officially. Card slots not used, are covered by dummy plates. KARTE 1 BOARD KARTE 2 BOARD KARTE 3 BOARD KARTE 4 BOARD CPU V2 KARTE 1 BOARD KARTE 2 BOARD KARTE 3 BOARD KARTE 4 BOARD CPU V2 Optional digital interfaces, top: with the choice of DSfG or COM2 bottom: with the choice of TCP, DSfG or COM2 with caption (label) each. EnCal 3000 Controller rear view (example) page 6 EnCal 3000
13 3 Operating the Device This chapter s objective is to give you an understanding of the basic operating and menu structures of gas-net devices. As already mentioned, all devices of the gas-net family have a uniform appearance and a comparable menu structure. This means: If you have operated a gas-net device once, you will also be able to easily operate all other device types. According to our philosophy of how to parameterize gas-net devices, they are parameterized by means of a PC and not via the operator panel. The device operation via the operator panel mainly serves the indication of the most important information on the display. The content of the operator interface on the display depends on the individual gas-net device type Keypad The keypad of gas-net devices consists of a numeric keypad for entering numbers, the minus sign and decimal point keys, and a group of four navigation keys. With these keys, you can move within the menu structure and invoke menus and displays. In some cases you can also trigger actions or change values via the navigation keys. The illustration below shows an overview of the keys meanings. The exact context-related meaning of each navigation key will be explained together with the menu structure in Chapter Numeric key pad incl. minus sign and decimal point , Arrow key left: Previous entry. Input mode: delete previous character Arrow key right: Next entry. Input mode: Quit input mode without changing values. Enter. Menu selection. Enter input mode. Within input mode: Accept new value. Menu key: Opens/closes a menu. When starting from a display this means: Pressing once opens the current display's submenu listing. Pressing twice opens the menu listing for branching to other modules. Pressing three times closes the menu Other Operating Elements: Status LED, Calibration Switch The status LED on the device front is a three-color light emitting diode. The status of this LED indicates whether a gas quality measurement error is pending or has been pending. Please refer to the table below for the meaning of the colors: LED status red, flashing yellow, flashing green, flashing red, permanently illuminated yellow, permanently illuminated green, permanently illuminated Meaning An alarm is pending, i.e. an error has occurred that affects the correction. A warning is pending, i.e. an event has occurred without affecting the correction. A green flashing light appears during the start-up phase after a mains failure. An alarm has been pending but is no longer relevant. It can be removed from the error listing by accepting it. A warning has been pending but is no longer relevant. It can be removed from the error listing by accepting it. The device runs error-free. EnCal 3000 page 7
14 The sequence of the LED status lights in the above table corresponds to the sequence the error management keeps to: The system always indicates the error with the highest priority. A pending error always takes precedence over an error that is no longer relevant. The exact meaning of the terms alarm, warning and hint is explained in Chapter The calibration switch is on the lower right side of the front panel. The EnCal 3000 Controller is furnished with a two-level safety concept: All parameters being protected by the calibration switch can only be changed if the calibration switch is open. Such parameters are always modified with a PC and the GW-GNET+ parameterization software. Open the calibration switch by turning it anticlockwise as far as it will go. This first safety level is important for devices used for legal metrology and custody transfer. In this case, seals may officially secure the calibration switch and must possibly be removed before. The basic device display will automatically be invoked when you close the calibration switch. Note: The User lock as the safety concept s second level consists of one numerical lock for each of the two contract parties. The user lock is, in contrast to the calibration switch, implemented via the device software. This means that the locks are defined via the device parameterization and opened or closed via the operator panel. Open locks allow the user to access certain parameters or actions. All parameters being subject to the user locks can be changed when both locks are or the calibration switch is open Display The display is an illuminated LCD consisting of 8 lines with 32 characters each. After approximately 30 minutes without a keystroke, the display s background illumination switches off automatically Displays / Menus / Dialogs This chapter describes the menu assistance and operation of all gas-net devices in general. Individual subjects have been illustrated with examples, where appropriate. These examples refer to currently available device types; it can therefore happen that a special menu illustrated in an example does not exist in your gas-net device type. The operating mechanisms generally described here function in all devices in the same way. Each module has a main display that indicates all important current values. For example: The EnCal 3000 Controller contains, among others, the modules Gas Quality and Monitoring. The main display of the Gas Quality module shows the current analysis data, whereas the main display of the Monitoring module indicates the error listing. The main display of the first module is also the basic display of the device, i.e. the display that is invoked automatically if there has not been any keystroke for about 30 minutes. For example: The EnCal 3000 Controller is capable of dual-stream operation, so it contains one Gas Quality module per gas stream. The basic display of the device is the main display of the Gas Quality module of stream 1. A display serves to indicate values. If there are more entries than can be made visible at once, little scroll arrows on the right side indicate whether or not you can scroll upwards or downwards. The scrolling is either implemented line by line or, if the display contains many entries, also page by page or by coherent blocks. page 8 EnCal 3000
15 Down scroll arrow pointing downwards: Scroll downwards with the rightward arrow key. Up scroll arrow pointing upwards: Scroll upwards with the leftward arrow key. Each invokable display belongs to a module within the device software and thus to an enclosed functionality. In the display of a module, no matter which one, there are principally two different navigation targets within the menu of the device. One target can be a subordinate display/dialog 1 of the indicated module, another one the basic display of any module. To be able to navigate within the menu structure as easily and quickly as possible, the Menu key has been provided with the following functions: Pressing the Menu key once opens the submenu listing offered by the currently opened module display. Pressing the Menu key again opens the menu listing containing all branching possibilities to other modules. Pressing the Menu key again closes the menu. The structure of a module s submenu listing depends on the current parameterization: Menu items referring to functionalities that have not been parameterized will not be offered for selection. For example: If the EnCal 3000 Gas Chromatograph is connected to only one stream, the gas quality module will not include the Other stream menu item. Submenus of a module either invoke further displays or dialogs in which the user can adjust values via the operator panel. The menu structure is tree-like: A subordinate menu item of a module can also have its own subordinate menu items. At lower hierarchy levels of the menu tree the following menu items exist for returning to the next higher level, depending on the context: In a display: menu item Back In a dialog: menu items OK / Cancel (OK also means accepting the modified values; Cancel means rejecting the modifications) No matter on which menu level you currently are: You can move back and forth within a menu listing and select a menu item by using the arrow keys. The selected target is presented in an inverted way, i.e. green writing highlighted in black. Activate the menu item belonging to the selected entry by pressing the Enter key. An example for the EnCal 3000 Controller: Let s assume you want to check the user locks. There is an own display in the System module for this; we therefore have to invoke the System module and branch to the module-specific submenus from there. Let s also assume the basic display of the Gas Quality module is currently invoked. If you press the Menu key, you will see the submenus offered by the Gas Quality module. 1 A dialog is a special kind of display indicating values you can edit via the operator panel. EnCal 3000 page 9
16 Start: Basic display of Gas Quality Invoke the menu: Menu listing of the Gas Quality module The dashes in front of the menu names indicate that the listing refers to subordinate menus. As we do not want to activate a gas quality menu in our example but branch to a different module, please press the Menu key again. Module listing (without listing dashes in front of the menu name) Now the menu shows the listing of all modules included in the device software. Press the rightward arrow key a couple of times until the module you want to invoke is selected. It s the System module in our example. 4x Module listing: The System module has been selected. Press the Enter key and the display of the module you have just selected will be invoked. Basic display of the System module page 10 EnCal 3000
17 Now you can probably guess how to proceed: Please press the Menu key to open the subordinate menu listing. The menu listing of the System module has been invoked. The dashes in front of the menu names indicate that the listing refers to subordinate menus. Our destination, the Locks menu, is the third entry in the menu listing. Therefore, press the rightward arrow key twice to select the Locks line. 2x The Locks menu has been selected. Press the Enter key afterwards to confirm your selection and invoke the related display. EnCal 3000 page 11
18 Further tips on navigating within the displays: If you have pressed the rightward arrow key too often and went too far down in the menu selection list, move upwards again by pressing the leftward arrow key. If you want to quit an invoked menu selection window without having made a selection, just press the Menu key again as often as necessary to close the menu window (twice in case of a menu listing within a certain module; once in case of the module listing). The selection of some menu items invokes a dialog. These dialogs are displays in which values can be modified. However, only a few values can be modified via the operator panel. In such input dialogs you move from one parameter to another by using the arrow keys. If a parameter must not be changed, it is crossed out on the display; for instance, because it is a parameter being subject to the calibration lock, which is closed at that moment. If you have selected an editable parameter, you can get into the edit mode by pressing the Enter key. To render the operation more convenient, there are different methods of defining a new value available, depending on the type of the value to be changed: Directly Entering a New Numerical Value If you want to replace individual characters only, delete the characters step by step from the right using the leftward arrow key. Then enter the new characters via the numerical keys including decimal point and minus sign. If it is easier to replace the entire value by a new one, just start with your entry right away: As soon as you press any numerical key the preset value will be deleted and overwritten by the new entry. Quit the edit mode via the Enter key. This initiates a consistency check: If you have entered a value that does not make sense in the present context or is not permissible, you will not be able to quit the edit mode. This way, you will be forced to correct the value you have entered. Just press the rightward arrow key to quit the edit mode without accepting the change, for instance after a false entry. Invoke the menu and select either OK (the new values will be accepted) or Cancel (the values will be rejected) to quit the entire dialog. New Value by Selecting a Value from a Listing The device software lists possible values in case of editable values the range of which is restricted to a fixed selection. Choose a suitable value from the listing via the arrow keys and accept it by pressing the Enter key. For example: Opening the revision switch of an EnCal 3000 Controller. (Note: This is only possible if the locks are open!). You can change the status of the revision switches in the Switches menu of the Monitoring module. Therefore, go to the corresponding dialog via the Monitoring - Switches menu item. The revision switch is marked as being closed in the above figure (Revision switch = off). Let s assume you would like to activate the revision switch. This switch is already selected when you invoked this display, which means you can immediately press the Enter key to get into the edit mode. A selection list opens, offering useful values (in this case: off and on). page 12 EnCal 3000
19 Select the desired value via the arrow keys, i.e. on. The display looks like this: Press the Enter key to quit the edit mode and invoke the menu: Confirm the new setting with OK or reject it with Cancel. Modifying Several Values at once Most of the dialogs do not offer individual values but whole groups of values for being modified. In such a case, edit the first selected value first. Switch to the edit mode by pressing the Enter key. Move to the next value by pressing the Enter key. Tip: If you don t want to modify an offered value, skip it by pressing the rightward arrow key. Change the value either by directly entering the new value via the numerical keypad or by selecting a new value from a listing. After having edited all values, press the Menu key. The invoked menu contains the menu items OK and Cancel. Selecting OK means accepting the modified values 2. Selecting Cancel means rejecting the changes. In both cases you will return to the display you had invoked last. 2 In this case, too, a consistency check is performed: If you have entered a value that does not make sense in the present context or is not permissible, you will not be able to quit the edit mode. You will have to correct your entry first. EnCal 3000 page 13
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21 4 Primer for Impatient Operators: What do I have to do to... Note: The EnCal 3000 Controller can be operated with one or two streams, i.e. it can indicate the analysis values of up to two gas streams of an EnCal 3000 Gas Chromatograph (GC). As the GC can be equipped with up to five streams, the streams to be indicated on the display must be selected. Select the streams in the parameterization of the controller (cf. Chapter 0, page 17). The two streams indicated by the controller are called gas stream A and B in the parameterization. You can assign a number from 1 to 5 to each of the two gas streams according to the up to five streams of the GC. The controller s display then indicates the gas streams with either A or B or with the numbers you assigned in the parameterization. The following examples assume that the controller has been parameterized with two streams, with gas stream A corresponding to GC stream 1 and gas stream B corresponding to GC stream 2. The basic display of the controller is always the main display of the Gas Quality module for gas stream A. The following instructions are based on the assumption that you are in the basic device menu, i.e. in the main display of the Gas Quality (1) module view the process values of the second stream in case of a dual-stream EnCal 3000 Controller? The EnCal 3000 Controller is capable of dual-stream operation. The basic display of the device is always the main display of the Gas Quality module for stream A. It shows the most important analysis values of this stream. To switch to the display of stream B (e.g. Gas Quality (2) module), please proceed as follows: 1) Invoke the submenu listing by pressing the Menu key once. The Other stream menu item is pre-selected. 2) Press the Enter key to confirm your selection and invoke the main display of the desired module. Tip: To switch back to the first stream, repeat the procedure described above and activate the Other stream menu item again. It is possible to discern at a glance to which stream the indicated analysis values belong by looking at the first line of the Gas Quality display the display states either Gas quality (1) or Gas quality (2) view the error listing of the Gas Quality module? If the status LED is flashing red or yellow or is permanently illuminated, the error listing contains alarm or warning entries. View the error listing by proceeding as follows: 1) Invoke the module listing by pressing the Menu key twice. 2) Press the rightward arrow key until the Monitoring menu item is selected. 3) Press the Enter key. The main display of the Monitoring module is invoked. The error with the highest priority level is indicated. Scroll through the error listing by means of the arrow keys. 4) Proceed to Chapter 5.3.2, page 50, should you need more detailed information. If you want to accept an error, proceed to read the very next chapter. Note: If the EnCal 3000 Controller is operated with two streams, each gas stream has its own error listing. There is, however, only one status LED at the device. Consequently, it is not possible to distinguish by the LED to which stream a message refers. The status LED will also flash red, for instance, when an alarm is pending for stream B, while stream A is operating error-free. To be able to clearly classify an error condition indicated by the status LED, it is necessary to check the error listings. EnCal 3000 page 15
22 After the Monitoring menu has been invoked, the error listing of stream A is displayed first. This is indicated by the text Gas Quality A in the third line. To view the error listing of stream B, proceed as follows: 1) Press the Menu key to invoke the listing of the subordinate menu items. 2) Press the rightward arrow key until the Next listing menu item is selected. 3) Press the Enter key. The error listing of stream B is shown indicated by the phrase Gas quality B in the third line. There may be up to three error listings. In addition to one or two gas quality error listings, an error listing of the Monitoring module s message processing is also available. Always switch to the display of the next error listing via the Next listing menu item. Gas Quality A Error Listing Gas Quality B Error Listing Next Listing Monitoring Error Listing Please refer to Chapter 5.2, page 40 for further information on the error listing of the message processing accept gas quality errors? Errors can only be accepted and thus removed from the gas quality error listings if they are no longer pending. To accept such an error, proceed as follows: 1) Open the error listing via the Menu key as described above in Chapter 4.2. If the EnCal 3000 Controller is operated with more than one stream, please ensure that the error listing of the desired stream is indicated. The third line of the display indicates the stream to which the currently invoked error listing refers. 2) Select the error you want to accept via the rightward or leftward arrow key. 3) Press the Menu key. If the error indicated on the display cannot be accepted, the first menu item appears as being crossed out: Accept. If the error can be accepted, just select Accept and press the Enter key. The error page 16 EnCal 3000
23 disappears from the error listing, and the error with the next lower priority level will be indicated on the display. 3 4) Repeat the steps explained above to accept further errors. Note: Accepting errors as described above only applies to errors in connection with the device s gas quality functions. How to accept messages of the general message processing (Monitoring error listing) is explained in Chapter to view the software versions? 1) Invoke the module listing by pressing the Menu key twice. 2) Press the rightward arrow key until the System entry is selected. 3) Press the Enter key. The main display of the System module is invoked, which shows the data for identifying the device (software version, check sum, etc.). Note: The software version and check sum shown here refer to the EnCal 3000 Controller. Please refer to the software manual of the EnCal 3000 Gas Chromatograph for the steps required for having the software version of the EnCal 3000 Gas Chromatograph indicated to view the device configuration? 1) Invoke the module listing by pressing the Menu key twice. 2) Press the rightward arrow key until the System entry is selected. 3) Press the Enter key. The main display of the System module is invoked. 4) Press the Menu key again and select the Device configuration submenu. The safeguarded parameters are sorted on the modules they belong to for a better overview. Choose the desired module in the Device configuration display: Press the Enter key, select a module via the arrow keys and press the Enter key again. Activate the View submenu. 3 The following special feature applies to an EnCal 3000 operated with two streams: An error referring to both streams disappears from both gas quality error listings as soon as it has been accepted in one of the listings. An example of such an error is alarm A409: Power failure. EnCal 3000 page 17
24 4.6 checking all parameter settings? The parameterization of a gas-net device contains too many settings for them to be conveniently displayed via the operator panel. It is much easier to get a general idea of the device settings by means of the GW-GNET+ parameterization program and a PC. 1. Connect the COM interface at the PC to the DSS interface at the gas-net device using a parameterization cable. In case of PCs without COM interface, you can connect the parameterization cable by means of a USB-to-serial converter cable. 2. Start GAS-WORKS on your PC. Activate the communication program by clicking the Import Data interface tool in the GW-BASE toolbar. 3. After having successfully started the communication program, you are linked with the connected device data technology-wise. The window appearing on your screen shows some important basic device information. 4. Select the Tools tab now. Double-click the Change parameters or the Edit parameterization entry. The GW- GNET+ interface will appear on the screen. This is where you can invoke and check the parameter listings of the individual modules. Please note: The Change parameters or Edit parameterization service programs also offer the option of changing device settings. The current status of the protection mechanisms (calibration switch / user lock) is of course taken into consideration. Please refer to the comprehensive online help of GW-GNET+ for further information. page 18 EnCal 3000
25 4.7.. view archives? 1) Change to the display of the Data Logging module: Press the Menu key twice, move to the Data logging entry using the rightward arrow key and press the Enter key. 2) Select exactly the archive information you want to view in the appearing dialog. Please refer to Chapter starting on page 41 for a detailed description of the filter function. EnCal 3000 page 19
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27 5 Functional Description 5.1 Gas Quality Module(s) Function The EnCal 3000 Controller is a device for indicating and controlling the measurement of the gas quality (GQ) of natural gases by the gas chromatograph (GC) of the same name (EnCal 3000 Gas Chromatograph). The GC uses the different adsorptions rates of the individual components contained in the sample gas, which are separated from each other on their way through the integrated GC column. Each component s concentration is measured at the end of the column by a detector. Each piece of gas quality data (e.g. superior heating value or relative density) can then be calculated based on the mole fraction of each individual component. The gas quality data is determined in the GC according to ISO and transferred to the EnCal 3000 Controller at the end of each analysis together with the values of the component fractions. Another variable is derived from these direct variables in the EnCal 3000 Controller: the methane number (Mn). A variable that can also be derived is the hydrocarbon dew point. It indicates the temperature at which the first hydrocarbons condensate. The gas will partly become fluid below this temperature. All components are completely gaseous above this temperature. The hydrocarbon dew point is indicated in Kelvin and can be determined for a parameterized pressure or the current online pressure. In case the current online pressure is used, an upper pressure limit can be parameterized. If the current value is above this limit, the dew point is determined for the parameterizable substitute pressure value. The dew point calculation is an additional option that must be purchased and activated with a license key in the parameterization. The following basic requirements also apply to the use of this option: The chromatograph must be able to measure all higher components up to n-nonan (C9). This is why the dew point calculation can only be performed in combination with the C9+ version of the EnCal 3000 Gas Chromatograph. The chromatograph must be parameterized accordingly for the application. A corresponding Modbus table 5 and a corresponding application 6 are necessary in particular. Furthermore, the GC should be able to identify the benzol (C6H6, benzene), cyclohexane (C6H12), methylcyclohexane (C7H14) and toluene (C7H8) components separately from the other components so that the dew point calculation is as accurate as possible. After the EnCal 3000 Controller has been switched on, it establishes the communication to the EnCal 3000 Gas Chromatograph and starts to permanently poll new analysis results. As soon as new analysis results are available they are indicated. Therefore, make sure to switch on the gas chromatograph about 30 s before the controller. You can restart the controller during the operation of the gas chromatograph as the gas chromatograph continues the parameterized measurement series independently. After a restart the controller indicates the last valid analysis results from before the restart until the first valid analysis after the restart has been completed and the results have been transferred. It may happen, however, that an analysis is being completed during the restart period of the controller. In this case the corresponding results are not transferred. A prerequisite for starting the measuring operation is that the helium carrier gas is applied with sufficient pressure. The gas chromatograph contains an electronic pressure regulator that determines whether the inlet pressure is sufficient. Another prerequisite for the operation to start is that the two modules of the gas chromatograph must have reached the respective parameterized operating temperature. The warm-up time of a cold device can take up to 30 minutes. The gas chromatograph waits until the operating temperature has been reached before starting to measure. Not until then can the controller indicate valid measurements. Observe the temperature of the gas chromatograph in the Instrument status display of the RGC 3000 (PC) software of the EnCal 3000 Gas Chromatograph (cf. Chapter 3.2 in the EnCal 3000 Gas Chromatograph Software Manual). 4 T1 = 25 C (combustion reference temperature), T2 = 0 C (volume reference temperature) 5 See Chapter 4.8 in the EnCal 3000 Software Manual 6 See Chapter 3.7 in the EnCal 3000 Software Manual EnCal 3000 page 21
28 Important: Operate the EnCal 3000 Controller after commissioning only while the calibration switch is closed! The calibration switch (rotary switch at the device front) can be sealed for safety reasons. A closed calibration switch ensures that actions to be performed by trained and qualified staff only, such as calibrating actions, cannot be started at the device by anybody else Gas Streams The EnCal 3000 Controller can indicate the analysis results of one or two gas streams of the EnCal 3000 Gas Chromatograph. In this case it contains one or two Gas Quality modules. The analysis results of either the first or the second gas quality module are updated in the controller, depending on the assignment of the current analysis result of the gas chromatograph to the respective gas stream. As it is physically the same gas chromatograph only one communication line is necessary even for dual-stream operation Strategy when Input Measurements Are Disturbed If the input values are disturbed, the last valid gas quality analysis performed before the occurrence of the error still applies. The device falls back to the entire last valid analysis even if only one component is disturbed Display and Operation Gas Quality Main Display While in the Gas Quality module s main display, you can quickly invoke all important current data of the gas quality measurement. The first line shows (in case of a dual-stream parameterization) to which gas stream the display refers; the second line shows the pending error with the highest priority level in clear text. The right section of the first two lines is reserved for displaying the calendar time with the corresponding time zone. The last three lines of the basic display show the current values of Hs, rho and CO2 indicated in a font that is twice as large as usual. If you scroll downwards, the display shows the mole fractions of the gas components and the analysis time of this measurement. The values shown in the basic display are only current and valid if the system is running error-free. This means that the measurement is not in an alarm condition and a calibration does not take place. page 22 EnCal 3000
29 Error with highest priority level Assigned gas stream Time and date Measurements for: Heating value superior Standard density Carbon dioxide The following figure shows an example for the basic display during an error-free operation: Down scroll arrow pointing downwards: Scroll downwards with the rightward arrow key. Measurements for: Nitrogen Methane Ethane Propane I-butane N-butane Neopentane I-pentane N-pentane Hexane and higher hydrocarbons End of analysis EnCal 3000 page 23
30 If the controller indicates the measurements of two streams, there is one main display for each gas quality module. In this case you switch to the display of the other module via the subordinate menu item Other stream to view the other gas stream. Switch to the indication of all gas quality data (for the current gas stream in case of two streams) via the subordinate menu item Measurements. Other stream menu item for indicating the gas quality of the second gas stream Measurements menu item for indicating all measurements and derived values of the current gas quality Other Stream If you use the controller for the indication of two streams, one main display is available for each gas quality module. Switch to the display of the other module via the subordinate menu item Other stream to view the other gas stream Measurements Display The EnCal 3000 Controller has an own display for indicating all gas quality data belonging to the current gas stream. This data comprises direct measurements as supplied by the main display and further derived measurement variables. Invoke this display as follows: 1) Invoke the menu in the basic display. 2) Press the rightward arrow key until the Measurements entry is selected. Press the Enter key. page 24 EnCal 3000
31 The EnCal 3000 Controller always indicates new measurements here after the EnCal 3000 Gas Chromatograph has finished a measurement within its sequence. This measuring sequence is the automatic iterative measurement of the preset gas streams. It continues independently after you have started it once. You can start it either via the PC software (RGC 3000) of the EnCal 3000 Gas Chromatograph or from the EnCal 3000 Controller as follows: Invoke the menu and confirm the selected Start sequence entry by pressing the Enter key. EnCal 3000 page 25
32 5.1.3 Calibration Display There are two different calibration types: the basic and the automatic calibration. Both are technically identical, except for the fact that in case of a basic calibration the currently determined response factors are saved as reference values in the EnCal 3000 Controller and serve as benchmarks for future calibrations. The currently determined response factors are then compared with the stored reference values during the automatic calibration. The resulting deviations are entered in the controller s Calibration archive. You can start the basic calibration only manually. Usually, you perform it when commissioning the device for the first time, whereas the automatic calibration is performed automatically and daily during operation at a parameterizable time. However, you can also start it manually at the EnCal 3000 Controller or remotely via a remote operating panel or the DSfG bus. You have to connect the calibration gas 7 properly to the gas chromatograph (Cal. channel) to ensure that the calibration is carried out successfully (cf. Chapter 5.1.5, page 36 and Chapter 2.9 or in the EnCal 3000 Gas Chromatograph Hardware Manual). For this, set the high-pressure regulator to an outlet pressure of 1 to 4 bars and open the corresponding shut-off valve, if available. If the calibration gas cylinder has not been opened yet, open it now and perform a purge first (cf. Chapter 5.1.5, page 36) Automatic Calibration The calibration switch at the EnCal 3000 Controller does not have to be open for this calibration type. If user locks have been parameterized, however, they must be open. An automatic calibration is carried out in a fixed cycle daily at xx o clock (parameterizable) in normal measuring conditions. You can also start this calibration type manually. The following reactions of the controller indicate the calibration status: The last valid gas quality data is maintained via measurement outputs and in the basic display of the controller, provided any data is available at all. The second line shows GQM calibrates. A revision status is not signaled to the corrector. To start the calibration manually, proceed as follows: While in the gas quality main menu, press the Menu key and activate the Calibration command in the invoked menu. A display with the actual and target values of the calibration gas to be measured appears. The actual values are still the ones of the last calibration (see analysis time). The target values are read out of the gas chromatograph and must be 7 The composition of the calibration gas should correspond to the process gas, and the quality of the components must be. 2.0 or better in order to obtain a sufficient accuracy of the instrument. Please contact Elster in advance to select the optimum calibration gas for your application. page 26 EnCal 3000
33 entered via the PC software (RGC 3000) of the EnCal 3000 Gas Chromatograph (cf. Chapter 5.4 in the EnCal 3000 Gas Chromatograph Software Manual). If you press the Menu key again, the following submenu appears: Select the Cal. start entry. The calibration starts after you have confirmed this selection as soon as the currently running analysis has been finished. The calibration always takes 14 minutes and is composed of the following periods: EnCal 3000 page 27
34 150 s purging time before the first analysis within the calibration sequence 180 s per analysis within the calibration sequence. A calibration sequence always consists of three measurements, the first of which is dismissed. The other two measurements are averaged. 150 s purging time before the first analysis within the process gas measuring sequence that has started again. The GQM calibrates message disappears from the display at the end of the calibration: After the calibration has been finished the gas chromatograph automatically injects the process gas again and starts measuring. The analysis results determined during the calibration are entered in the Calibration archive. If you want to abort the calibration prematurely, do so as described below: While in the main display, invoke the menu via the Menu key and select Calibration. Confirm your selection and open the menu again. Select Cal. Cancel and confirm your selection. The EnCal 3000 Gas Chromatograph interrupts the calibration now (at the end of the current analysis) and returns to the normal operating conditions. The gas chromatograph then carries on working with the old calibration data. The process is only aborted automatically if the inlet pressure of the carrier gas drops during the calibration. In this case, the EnCal 3000 Gas Chromatograph also returns to the normal operating conditions as soon as the carrier gas is injected again and carries on working with the old calibration data Basic Calibration This calibration type can only be started manually. The calibration switch at the EnCal 3000 Controller must be open. If user locks have been parameterized, they are ignored due to the open calibration switch. The following reactions of the controller indicate the basic calibration status: page 28 EnCal 3000
35 The last valid gas quality data is maintained via measurement outputs and in the basic display of the controller, provided any data is available at all. The second line shows GQM calibrates. A revision status is not signaled to the corrector. To start the basic calibration, proceed as follows: While in the gas quality main menu, press the Menu key and activate the Calibration command in the invoked menu. A display with the actual and target values of the calibration gas to be measured appears. The actual values are still the ones of the last calibration (see analysis time). The target values are read out of the gas chromatograph and must be entered via the PC software (RGC 3000) of the EnCal 3000 Gas Chromatograph (c.f. Chapter 5.4 in the EnCal 3000 Gas Chromatograph Software Manual). If you press the Menu key again, the following submenu appears: EnCal 3000 page 29
36 Select the Basic cal. start entry. The calibration starts after you have confirmed this selection as soon as the currently running analysis has been finished. The calibration always takes 14 minutes and is composed of the following periods: 150 s purging time before the first analysis within the calibration sequence 180 s per analysis within the calibration sequence. A calibration sequence always consists of three measurements, the first of which is dismissed. The other two measurements are averaged. 150 s purging time before the first analysis within the process gas measuring sequence that has started again. The GQM calibrates message disappears from the display at the end of the calibration: After the calibration has been finished the gas chromatograph automatically injects the process gas again and starts measuring. The analysis results determined during the calibration are entered in the Calibration archive. If you want to abort the calibration prematurely, do so as described below: While in the main display, invoke the menu via the Menu key and select Calibration. page 30 EnCal 3000
37 Confirm your selection and open the menu again. Select Cal. Cancel and confirm your selection. The EnCal 3000 Gas Chromatograph interrupts the calibration now (at the end of the current analysis) and returns to the normal operating conditions. The gas chromatograph then carries on working with the old calibration data. The process is only aborted automatically if the inlet pressure of the carrier gas drops during the calibration. In this case, the EnCal 3000 Gas Chromatograph also returns to the normal operating conditions as soon as the carrier gas is injected again and carries on working with the old calibration data Test Gas Injection The injection of test gases serves to check the gas chromatograph with a known gas or to measure unknown gases on a non-routine basis. It can only be started manually. The calibration switch at the EnCal 3000 Controller does not need to be open for this. If user locks have been parameterized, however, they must be open. The following reactions of the controller indicate the status of the test gas injection: The last valid gas quality data is maintained via measurement outputs and in the basic display of the controller, provided any data is available at all. The second line shows Revision/Test Gas. The revision status is signaled to the corrector. Inject the test gas as described below: While in the gas quality main menu, press the Menu key and activate the Test gas command in the invoked menu. A display with the actual and target values of the test gas to be measured appears. The actual values are still the ones of the last test gas measurement (see analysis time). The target values are read out of the controller and must also be entered here in this case (cf. Chapter , page 33). EnCal 3000 page 31
38 If you press the Menu key again, the following submenu appears: Select the Test gas start menu item. The test gas run starts after you have confirmed this selection as soon as the currently running analysis has been finished. A test gas measurement always takes 5 ½ minutes. It will be repeated until you interrupt it manually. A single test gas sequence is composed of the following periods: 150 s purging time before the first analysis within the test gas sequence 180 s per analysis within the test gas sequence. A test gas sequence always consists of one measurement. page 32 EnCal 3000
39 If you want to abort the process, proceed as described below: While in the main display, invoke the menu via the Menu key and select Test gas. Confirm your selection and open the menu again. Select Test gas cancel and confirm your selection. The EnCal 3000 Gas Chromatograph interrupts the test gas run now (at the end of the current analysis) and returns to the normal operating conditions. The process is only aborted automatically if the inlet pressure of the carrier gas drops during the test gas run. In this case, the EnCal 3000 Gas Chromatograph also returns to the normal operating conditions as soon as the carrier gas is injected again. The Revision/Test Gas message disappears at the end of the test gas run: The analysis results determined during the test gas measurement are entered in the Test gas archive Entering Target Values You can enter the reference values of the test gas (e.g. stated on the analysis certificate of the test gas cylinder) via the Target values submenu. Afterwards, they can be compared with the current measurements during a test gas injection. You can also have the absolute deviations calculated and indicated on the Differences display. To enter the target values, proceed as follows: While in the basic display, press the Menu key and activate the Test gas menu item. EnCal 3000 page 33
40 A display with the actual and target values of the test gas to be measured appears. If you press the Menu key again, the following submenu appears: Select the Enter target values entry and confirm your selection. A listing with the gas quality data of the test gas to be used appears. You can enter all values via the display: To edit a value, get into the edit mode by pressing the Enter key. page 34 EnCal 3000
41 You can enter a new value now, e.g.: If you exit the input field by pressing the rightward arrow key, the value you have entered will not be accepted. If you exit the input field by pressing the Enter key, however, the old value will be replaced by the new one. Note: When leaving the menu, you have to decide again whether you want to accept the new gas quality data or return to the previous ones. New value has been accepted: Old value will still be used: To quit the Enter target values submenu, press the Menu key and choose one of these two options: Accept all pieces of new gas quality data: Continue to use all pieces of old gas quality data: If you select OK, all values are used as new target values of the test gas. By selecting Cancel you return to the Test gas menu without accepting values you have possibly edited before. In this case, the target values that were valid before you have opened the Enter target values submenu are still valid. EnCal 3000 page 35
42 5.1.5 Cylinder Change / Purging Different gases must be available in the station for calibration and measurement tasks. From time to time, it is therefore necessary to connect a new gas cylinder to a gas supply connection of the EnCal 3000 Gas Chromatograph; for instance, if the pressure of the calibration gas cylinder is insufficient. To remove the old cylinder, proceed as follows: 1. Close the old cylinder at the main valve on top of the cylinder and unpressurize the connected gas line. You possibly have to wait until the remaining gas has been used up or use an available venting possibility (low pressure side). 2. Screw the cylinder connection off the cylinder and close the cylinder with the corresponding nut. 3. Place the protective cap on the cylinder and fasten it. 4. Detach the possibly attached safety chain or clamp and remove the cylinder. To connect a new cylinder, proceed as follows: 5. Secure the new cylinder with a chain or clamp against falling down first. 6. Remove the protective cap from the cylinder by unscrewing it. 7. Make sure that the main valve on top of the cylinder is closed. 8. Remove the nut from the valve connection now. 9. Make sure that the pressure reducing and the shut-off valve of the high-pressure or cylinder pressure regulator to be connected are closed. Close the pressure reducing valve by unscrewing its setting screw. 10. Connect the cylinder connection of the high-pressure or cylinder pressure regulator to the valve connection of the gas cylinder. 11. Open the main valve of the gas cylinder and adjust the outlet pressure of the high-pressure or cylinder pressure regulator to the operating pressure needed by the gas chromatograph for the gas stream you are preparing just now. To purge the high-pressure or cylinder pressure regulator, proceed as follows: 12. Close the main valve of the gas cylinder and wait until the high-pressure or cylinder pressure regulator has almost drained, i.e. until the outlet pressure has almost sunk to 0 bar. Now open the gas cylinder again. 13. Repeat this draining and filling of the high-pressure or cylinder pressure regulator twice to ensure that the regulator s dead volume does not contain any gas from the previous use or any air. 14. Pay attention to the fact that the gas cylinder must be open at last to make a calibration or measurement possible. page 36 EnCal 3000
43 5.1.6 Revision The EnCal 3000 Controller sets the revision status when test gas is injected. A set revision status means that the gas quality is not measured under normal, proper operating conditions. All entries in the Hourly mean bill archive are therefore marked with the Revision status note. Furthermore, the Revision/Test Gas hint is generated and entered in the error listing and logbook. A termination of the test gas measurement results in the end of the Revision/Test Gas hint with an entry in the logbook and a last entry marked Revision in the Hourly mean bill archive. The gas quality measurement runs normally again. You can also set the revision status manually to mark an incorrect gas quality measurement. For this, open the menu by pressing the Menu key while in the main display: If you press the Menu key again, the module listing appears. Choose the Monitoring module via the rightward arrow key and confirm your selection by pressing the Enter key. Open the submenu overview in the appearing display of the Monitoring module by pressing the Menu key. Select the Switches submenu with the rightward arrow key and confirm your selection by pressing the Enter key. EnCal 3000 page 37
44 The revision switch has already been selected in the appearing display. Get into the selection mode by pressing the Enter key: Switch the revision switch on by pressing the rightward arrow key: Press the Enter key again to quit the selection mode. Only by quitting the Switches menu you finally confirm whether you want to accept the new switch settings or reject them. For this, open the menu by pressing the Menu key: page 38 EnCal 3000
45 If you confirm the OK option by pressing the Enter key, you accept all switch settings as indicated now. By pressing the rightward arrow key and confirming the Cancel option with the Enter key afterwards, you reject all changes you have made and carry on working with the old switch settings as they were before you have opened the Switches menu. If you have set the revision status by means of the revision switch, it will be indicated on the display just like during a test gas run and signaled to the corrector. EnCal 3000 page 39
46 5.2 Data Logging Module Function EnCal 3000 Controllers are always equipped with an integrated data logging function. The responsible Data Logging module, however, provides only the data logging service. The actual data to be logged is generated by other modules of the module group. When parameterizing the Data Logging module, you only have to define which of the available archive groups shall actually be logged and which storage depth shall be applicable. All archives defined in that way are designed as ring storages. The data logging depth determines how many entries an archive is able to write at most. If an archive is full, the respective oldest entry will be overwritten by each new entry. The following sections describe the types of archive groups the individual software modules provide: Gas Quality Module: If two gas streams are measured, all archives of the Gas Quality module are available once for each stream. Among others, the Hourly mean bill. archive type is available for each gas stream. The related data (superior heating value, density, carbon dioxide and nitrogen concentrations) are cyclically logged with a time mark every hour and upon each occurrence of an error. This archive is supplemented by the Hourly mean ext. and Hourly mean comp. archives, which log further gas quality data every hour. The Daily mean comp. archive logs the gas quality data daily at a defined time (when the daily archives start, i.e. at the hour of the gas day beginning). The Monthly mean comp. archive logs analogously the gas quality data monthly on the first day of a month at a defined time (when the daily archives start, i.e. at the hour of the gas day beginning). Furthermore, there are the Calibration and Test Gas archives that only log data during the corresponding actions. In case of a calibration this is exactly one archive entry at the end of the calibration sequence; in case of a test gas run entries are created after each analysis at regular intervals for the time the test gas injection lasts (one hour max.). The Single analyses archive can be compared with the latter. The results of each analysis are saved in this archive during normal operation. Finally, a special Long-term archive is available for the gas quality measurement. This archive exclusively logs billingrelevant data cyclically together with a time mark. Another channel of the Long-term archive contains the number of the alarm with the highest priority level that has been pending once during the last billing interval. Monitoring Module: The Monitoring module facilitates the compilation of process value archives (archives with any measurements). Moreover, it runs one logbook for each stream of the gas quality measurement, where the beginning and end of all error types (alarm, warning, hint cf. Chapter 5.3.1) are entered in clear text and together with a time mark. The internal message processing is also provided with an additional, separate error listing (Monitoring Logbook), which can be logged. System Module: The System module keeps a parameter change archive (Changed Settings archive), in which changes of the parameterization are logged. If the device is operated with two streams, the changed settings archive logs the parameter changes of both streams. If individual parameters are modified, the old and new values will be logged in addition to the time mark. A completely new parameterization will be entered in the changed settings archive as New parameterization via the data interface when the calibration switch is open. A change of the parameterization s operational part is marked as New parameterization (op.). Note: You can configure the archive depth, exact composition and order of archives largely by yourself via the parameterization. However, when changing the archive structure, you have to delete the old archives already existing in the device. page 40 EnCal 3000
47 Before delivery, the devices have already been provided with a pre-defined archive structure corresponding to common requirements Display and Operation Main Display (Data Logging Module) All existing archive entries can be made visible at the operator panel. The main display of the Data Logging module consists of a mask in which you can choose the data you want to view more closely. The following illustration shows an example: Current calendar time } Input mask for selecting the archive information that shall be indicated in the next step. After the main display of the Data Logging module has been invoked, the most recent entry of the first channel of the first archive group is always indicated first. Choose the archive information you want to view: The archive group type is selected at the beginning, i.e. it is highlighted in black. Press the Enter key to get into the edit mode. A listing opens up from which you can choose the desired archive type via the arrow keys. Afterwards, confirm your choice by pressing the Enter key. Specify the archive channel you want to view in detail in the next selection field. Several possibilities are offered, depending on the archive group type you have selected in the first step. For instance, you can choose between Hs, rho, d, CO2, N2 and Z (status 8 ) in case of the Hourly mean bill A archive type. You can now specify the point of time to be filtered by changing day, month, year, and time one after the other. You get into the edit mode for each respective field by pressing the Enter key and are thus able to specify date and time step by step. Confirm your entry by pressing the Enter key. The next field is selected. Select the entry you want to view via the ordinal number 9 in this field. As there is an unambiguous relation between date and ordinal number, the related ordinal number is indicated automatically after the date has been entered (see above). If you enter a different ordinal number, the date in the second line of the selection mask will be adjusted automatically. Invoke the selected archive via the menu (see next section). 8 Status stands for a bit string that provides an overview of the EnCal 3000 Controller s status. 9 Each individual measurement variable of an archive group logged by a device additionally has an ordinal number for reasons of unambiguity. The order of the ordinal numbers is arranged in such a way that the very first archive entry receives the number 1. The ordinal number for each further entry is increased by one. Ordinal numbers are needed, for instance, for polling archive data via DSfG. EnCal 3000 page 41
48 Subordinate Menu Items (Data Logging Module) View Activating the View menu item invokes the display of the archive channel you have selected in the main display. The archive type, archive channel and current calendar time are shown in the first two lines. Each entry is always indicated with a time mark, value and unit. The density ratio d has no unit and is logged accordingly. Furthermore, a change compared to the previous archive entry is indicated. For example (Hourly mean bill A, Hs channel): Archive type and archive channel Current calendar time Time mark, value and unit Difference between last entry and currently displayed entry Archive entry with ordinal no. 9 The "up" and "down" scroll arrows indicate that you can view even more archive entries (scroll with leftward and rightward arrow keys) Next Channel Previous Channel The next/previous channel menu items serve to quickly switch over to another channel of the same archive group. Back Return to the main display, i.e. to the selection mask for viewing archives, via the subordinate menu item back. Tip: The archive representation on the display is limited due to a lack of space. To analyze larger archive areas it is much more practical to read the archives out of the device and into a PC before; for example via the data interface by means of the GAS-WORKS module GW-REMOTE+. You can view the data afterwards in a table or as a diagram with the GW-DATA+ program. page 42 EnCal 3000
49 5.3 Monitoring Module Function The Monitoring module basically performs the signaling and monitoring tasks of the device: Monitoring the gas quality (-ies) for errors. Together with the Logbook functionality (Data Logging module, cf. Chapter 5.2) the gas quality error listings serve to analyze and remove gas quality-related errors and to be able to understand the history of the course of the error. Monitoring of any logged measurements Signaling of operating states Measurements Log-on of process value archives (archives for measurements that can be used to replace a recording instrument) Switching functionality Monitoring of Gas Quality (-ies), Error Listing(s) There are three different kinds of gas quality errors, which are also treated differently by the error management: An Alarm is generated if a gas quality-relevant error has occurred. Beginning and end of an alarm are entered in the related error listing together with a time mark (<Alarm> begins/ends). If an alarm is no longer pending, i.e. it is no longer relevant, you can accept it at the device and thus remove it from the error listing. A Warning is generated if a system-relevant variable is affected by an error that does not influence the result of the gas quality measurement (e.g. changing the time). If a warning is no longer pending, i.e. it is no longer relevant, you can accept it at the operator panel and thus remove it from the error listing. A Hint is generated if a measurement violates a hint limit specified by the user (e.g. upper/lower hint limits for gas quality data, pressure, temperature). In addition, a hysteresis can be defined to avoid fluttering messages when a measurement fluctuates around a limit value. The message <Hint limit begins> will then only be generated or removed if the measurement is not within the hysteresis range. Lower hint limit occurs Lower hint limit ends Upper hint limit ends Upper hint limit occurs measured value Hysteresis range Lower hint limit Upper hint limit Hysteresis range A hint is also generated if an event occurs that has no influence on the gas quality measurement (e.g. Calibration switch open). The beginning of a hint is entered in the error listing together with a time mark. Hints cannot be accepted and automatically disappear from the error listing after they have ended. A complete listing of all errors together with their classification is included in the annex to this documentation. EnCal 3000 page 43
50 Note: If the EnCal 3000 Controller is operated as dual-stream device, the error management is performed separately for each stream. Consequently, there are also two gas quality error listings. There are alarms that are restricted to one stream; for example, a violation of the specified range of stream A will only trigger an alarm for stream A, whereas the error status of stream B is not affected. In addition, there are errors affecting both streams equally. Such an error, for example the Power failure alarm, is entered in the error listings of both streams. The status LED of the device indicates the message with the highest priority level (pending alarm, pending warning, unaccepted alarm, unaccepted warning) according to the table shown in Chapter 3.1.2, page 8. During multiple-stream operation it does not matter to which stream the error with the highest priority level belongs; the status LED does not show which stream is affected. You can always obtain detailed information via the error listings. The software of the EnCal 3000 Controller includes a revision switch to facilitate a system check by revision. You can activate this revision switch via the operator panel at the device if the user locks are open. If the revision switch is set, the Revision/Test Gas hint is generated and entered in the error listing and logbook of all streams. From then on, all entries in the Long-term archive are marked with the Revision status note. A closing of the revision switch results in the ending of the Revision/Test Gas hint with an entry in the logbook and induces a last entry in the Long-term archive marked with the Revision note. All streams operate normally again Measurements An EnCal 3000 Controller supplies a whole lot of measurements from the gas quality measurement. It can also capture measurements via analog inputs and partly also creates derived measurements. An example for such an analogously collected measurement is a temperature value supplied by a thermostat. In addition to monitoring measurements for hint limits and gradients, the device can also file up to 32 measurements. For each defined measurement the minimum and maximum values measured since the last reset are indicated. You can view these values together with the associated time marks on the display Measurement Monitoring; Messages and Groups Note: The message and signal processing of the Monitoring module runs completely independent of the monitoring of the device s gas quality functions. This functionality of the Monitoring module is therefore provided with a separate error listing and an own logbook. Please take into consideration that the rules of this message processing considerably differ from those of monitoring the gas quality functions (see above); the acceptance mechanism is totally different, for instance. If you know the DIN standard (Signalling of operating conditions), you may be familiar with many terms mentioned in the description below. The message processing of the EnCal 3000 Controller is oriented towards this standard wherever it has proved to be useful and possible with regard to the monitoring function. The message processing in the EnCal 3000 Controller can manage up to 64 messages defined by parameterization. In principle, there are different types of conditions to be signaled that can be mapped on such a message. You define yourself the events that shall result in messages within the message processing when parameterizing the device. First, the status of a digital message input (set/not set) can be evaluated as message. Messages generated by the device itself during operation can also be included in the message processing, such as a gas quality alarm. Second, measurements can be monitored for limit violations. This applies to measurements supplied via analog inputs or measurements created internally, such as the superior heating value. In addition to monitoring upper and lower hint limits as well as boundaries, you can also monitor gradients. The gradient monitoring observes measurement changes within defined time ranges: If the difference between the largest and smallest values of a measured quantity exceeds the defined maximum value within a parameterized time range, the condition for generating the Hint limit gradient message has been met. Note: All single messages referring to measurements are also pending if the corresponding input value is regarded as being disturbed. page 44 EnCal 3000
51 There are two different methods of avoiding fluttering messages: 1. Hysteresis monitoring (only in case of measurement monitoring) You can additionally define a hysteresis to avoid fluttering messages when a measurement fluctuates around a limit value. The message <Hint limit begins> will then only be generated or removed if the measurement is not within the hysteresis range. Lower hint limit occurs Lower hint limit ends Upper hint limit ends Upper hint limit occurs measured value Hysteresis range Lower hint limit Upper hint limit Hysteresis range 2. Considering a minimum pending time If a minimum pending time is evaluated, a message is only considered pending if the condition to be signaled (set digital input, hint limit violation, etc.) is pending longer than the minimum pending time lasts. The target of the message-processing concept is to combine messages in groups. Owing to group monitoring and evaluation the monitoring itself remains clearly understandable even if the amount of signals is rather large. You can define the scope of the related error listing by yourself, namely by determining in the parameterization for each message whether a single message shall be entered in the error listing and logbook of the Monitoring module. Only if this is the case, the message will be entered in the error listing as soon as it begins. There is no acceptance required for single messages; they are automatically removed from the error listing when they end. If a message is entered in the error listing, beginning and end of this message are also entered in the logbook. The Data Logging module can log the logbook of the Monitoring module. You can disable individual messages during operation, which is, for instance, rather helpful during a plant inspection. The message processing completely disregards disabled messages, which are always considered not pending. You can change the disable note of a message via the operator panel of the device, via the parameterization and with a DSfG setting telegram. Single message data (characteristics, current values) can be enquired via DSfG. Some properties are also adjustable via DSfG, such as hint limits and gradients. 10 In order to simplify the monitoring of up to 64 messages, single messages can be combined by parameterization in up to 32 groups in any composition whatever. Each group generates 3 different messages that are created by linking the single messages contained in that group. This way, you can monitor the status of content-related messages without getting lost in the observation of single messages. The different message types of a group are called Group message, Held group message and Centralized message. 10 The DSfG data elements for message processing are included in the DSfG data element tree of the Control entity. Please ask Elster for a precise list of the supported or used DSfG data elements, when required. EnCal 3000 page 45
52 Group message A group s group message results from the OR operation of the single messages belonging to the group. Thus, a group message is pending if at least one of the group s messages is pending. A group message is not linked with an acceptance. Held group message The held group message only differs from the normal group message by always keeping to a holding time; for instance, for taking the telecontrol response times into consideration. A held group message is pending at least as long as the holding time lasts even if the normal group message ends during the holding time. Group Single message M1 Single message M2 Group message Held group message = holding time Centralized message A special feature of the centralized message is that it can link the states of single messages with an acceptance signal. The Acceptance required or No acceptance required property is defined as group characteristic in the parameterization. All centralized messages are entered in the logbook and error listing. If a group is marked with No acceptance required, the result of the centralized message is always the same as the result of the group message. There are two different procedures for the acceptance technique and the status of the centralized message of a group marked Acceptance required. These two procedures are described below. Acceptance technique of centralized messages, procedure to DIN According to this procedure, the centralized message of a group characterized Acceptance required links the states of the single messages contained in that group with an acceptance signal. The acceptance can either be implemented via an assigned digital input or via the Accept all menu item, i.e. via the operator panel. An acceptance accepts all groups at once. The source of the acceptance does not matter. The centralized message of a group classified as Acceptance required is pending if at least one single message of the group is pending. It will only end with the end of the last single message if all pending messages have been accepted. A currently pending single message is also considered accepted if it had been accepted before it ended. The fact that a centralized message is still pending after the last single message has ended indicates that at least one of the single messages has begun again after the last message was accepted. In such a case the single message or single messages just has/have to be accepted! The following illustration shows how, according to procedure 1, the centralized message of a group classified as No acceptance required differs from the one of a group classified as Acceptance required. page 46 EnCal 3000
53 Group Single message M1 Single message M2 Centralized message group marked no acceptance required (= group message) Centralized message group marked acceptance required Acceptance Acceptance Acceptance Acceptance Acceptance technique of centralized messages, standard procedure According to this procedure the result of the centralized message of a group classified Acceptance required ensues from the OR operation of the single messages. It does therefore not differ from the result of the group message and the no-acceptance-requiring centralized message. This means in particular that the centralized message also ends when the last contained single message ends. In this case, however, it remains in the error listing and waits for being accepted. The centralized message disappears from the error listing after acceptance. These groups with their centralized and group messages are intended to provide an overview of the plant conditions. This is why the output of these message types is supported in different ways: In contrast to single messages, centralized and group messages can be output via digital outputs. The events Group message begins / Group message ends / Any message of the group begins / Any message of the group ends can be routed to the DSfG bus with an attention telegram. It can be determined separately for each group upon which events such attention telegrams shall be generated and of which type they shall be (Alarm, Hint or Warning). The status of centralized, group and held group messages can be enquired via DSfG. Only the centralized message of the messages linked within a group is entered in the error listing and logbook of the message processing to keep them well-structured. A Maintenance switch (M-switch) is used to suppress group and/or centralized messages if maintenance work has to be performed. The setting of this M-switch can affect each group differently: - No influence A set M-switch does not have any effect on the signaling reactions of this group. - Suppression towards telecontrol This means that, if the M-switch is set, the group does no longer trigger any DSfG attention telegrams and the Held group message is always considered not pending. - Suppression of all signaling reactions without exception In this case all messages generated by a group are suppressed if the M-switch is set. This means that the group neither generates held group nor group nor centralized messages. Nevertheless, the centralized message is still entered in the logbook and error listing. If the M-switch is set, the main signaller no longer takes the group into account. The M-switch is activated via an assigned digital input. It cannot be set via the operator panel for safety reasons. Status and signaling reactions of single messages remain unaffected by the M-switch. Single messages are suppressed via the disabling mechanism explained above. EnCal 3000 page 47
54 In addition to the above-mentioned messages a message named Main signaller is also available. It usually triggers a hooter if being routed to an output. An additional acceptance input is assigned to the main signaller. The main signaller can include any number of groups. It begins when a message arrives that belongs to one of the involved groups, and it ends upon acceptance, no matter whether or not messages are still pending. You can accept it via the digital input assigned to the main signaller. Besides, if all groups are accepted via the operator panel, the main signaller is also accepted. It begins again as soon as the next involved message arrives. The following illustration shows the behavior of the main signaller in connection with the acceptance (in case of one involved group): Group Single message M1 Single message M2 Acceptance Acceptance Main signaller message page 48 EnCal 3000
55 Logging on Measurement or Counter Archives The EnCal 3000 Controller is able to keep archives for process values, i.e. archives for measurements and count values. Up to four archive groups with up to 8 channels each are available. You can determine for each archive group individually in which conditions the contained archive channels shall be logged. The standard procedure used is cyclic data logging (with parameterizable data logging cycles from one second up to one hour). Additionally or alternatively, the data logging can be made conditional on certain events detected during the monitoring of the process values: It is possible to link the data logging with one or more group(s) of single messages. In this case the logging takes place upon the beginning and end of each message contained in one of the involved groups. If the trend of a particular process value shall be logged in detail, a maximum change rate can be defined for an archive channel. Then the entire archive group is logged each time the difference between the current measurement and the value measured during the last data logging exceeds the maximum change rate. This way, the data is logged more often in case of quickly changing values. This option is also available for counter archives, which means you can define that the data logging starts each time a count value has increased by a defined difference. Measurements and count values are always logged additionally if the input value has been identified as being disturbed. It is possible to freeze process value archives. If an assigned message begins, the corresponding archive continues to log data and stops after a set number of entries has been reached. The point of time of the last entry will be marked with hint PVA <no.> freeze begins (PVA stands for ProcessValueArchive) in the error listing and logbook of the Monitoring module. The data logging will only be continued when the assigned message ends. Simultaneously, hint PVA <no.> frozen also ends. The freezing of measurement archives is useful if you are interested in how a measurement behaves if a certain event occurs. It is possible, for instance, to link the freezing with a centralized message. Then, the freezing will be activated upon the first beginning of any message of the group. Normal data logging will not be continued after the end of the last message until the group has been accepted explicitly, for the centralized message only ends in this case. In addition, you can make the logging in a process value archive conditional on a message. In this case, data is only logged in the archive if the allocated message has been set, independent of all other conditions. EnCal 3000 page 49
56 5.3.2 Display and Operation Main Display (Monitoring Module) The display indicates the error listing of stream A when you invoke the Monitoring module. The error message with the highest priority level 11 is visible, provided the error listing is not empty. If the error listing contains further errors, you can scroll through the error listing with the arrow keys. The little black scroll arrows on the right side of the display indicate whether or not there is more than one entry in the listing. The following information is provided for each error: Error type (Alarm, Warning or Hint) Current time DSfG error number Error description (clear text) Up and down scroll arrows: There are at least two more errors in the listing. Date and time of Beginning and End (The latter is only indicated if the error is no longer pending.) Subordinate Menu Items (Monitoring Module) Accept The Accept menu item only exists for gas quality error listings. If this menu item is crossed out, you cannot accept the indicated message because it is still pending. If Accept is not crossed out, however, you can accept the currently indicated error message and thus remove it from the error listing. After you have accepted the message, the menu is cleared and the next error is displayed. Just repeat the procedure if you want to accept this error, too: Invoke the menu and confirm Accept. Accept all (only available for the Monitoring error listing) The Accept all menu item is only available if you are in the error listing display of the Monitoring module; you accept all groups requiring an acceptance together with the main signaller (hooter) via this menu item. Accept all is crossed out if there is no need to accept any messages. 11 An alarm has the highest priority level, i.e. it is of greatest importance. A warning has a higher priority level than a hint. Cf. Chapter for an explanation of the terms Alarm, Warning and Hint. page 50 EnCal 3000
57 Next listing You can switch to the respective following error listing via Next listing. There are up to three error listings: the Gas Quality A, the Gas Quality B and the Monitoring error listing. The following messages are entered in the error listing of the Monitoring module: Messages named System messages 12 have top priority. The next position shows an M-switch message if the maintenance switch has been activated. All pending centralized messages of groups 1 to 32 are indicated below. Pending single messages follow according to their priority level. In order to keep the error listing clearly understandable only such single messages that have been parameterized accordingly are entered in the error listing. In principle, all single messages of the message processing including the M-switch message do not require an acceptance. Only centralized messages of groups requiring an acceptance must be accepted. This means that all single, group and centralized messages of groups that do not require an acceptance automatically disappear from the error listing when they stop pending. Centralized messages of groups requiring an acceptance will only end after they have been accepted and if none of the single messages of the group is pending any longer. The messages can be accepted even before the last single message has ended. Measurements An EnCal 3000 Controller can have up to 32 parameterized measurements for maximum/minimum indication on file. If you invoke the related display, the first measurement is indicated. You can switch to the display of another measurement via the name. The display contains the following information in detail: Name of the shown measurement: Pressing the Enter key opens up a selection list containing all measurement names. You can switch to the indication of another measurement via this listing. Current value incl. unit: Flashes if the data source is disturbed. Line before last: Minimum value since last resetting, with time mark. Last line: Maximum value since last resetting, with time mark. If the associated measurement is indicated as being disturbed, the display keeps showing the last valid value. The value is flashing in this case. 12 System messages are generated for instance for the events Re-start performed, Power failure, New parameterization and Parameter changed. These messages are usually not visible in the error listing as they are pending for only one second. Other messages that are important for the entire system, such as Interface monitoring in case of a board location error or Calibration/User switch open are more like hints and disappear automatically from the error listing after they have ended. EnCal 3000 page 51
58 The measurement display contains the following subordinate menu items: Resetting The Resetting menu item sets the minimum and maximum values of the indicated measurement to the current measurement. Reset all The Reset all menu item resets all filed measurements. Groups The Groups menu refers to the message processing of the Monitoring module. You can invoke the related display only if message groups have been created. The display facilitates an overview of the event status of the messages linked in a group. If you invoke the related display, you will see information on the first group. To switch to the display of another group, get into the edit mode (by pressing the Enter key) and select the name of the group you want to view from the appearing listing. Confirm your choice by pressing the Enter key again. Name of the indicated group First message, i.e. the message of the group that has begun first. The text is flashing if the message has not been accepted via the group yet. New message, i.e. the message of the group that has begun last. The text is flashing if the message has not been accepted via the group yet. If the centralized message of the invoked group is currently pending, the single message of the group that has begun first is indicated below First message. As this is always the message that has initially caused the beginning of the centralized message, this information helps to analyze the error condition. The message text is flashing if no message has been accepted yet after the beginning of the centralized message. You can read off the single message of the group that has begun last below New message. As long as the centralized message itself is pending, the New message indication is updated upon each beginning of a new message of the group. A New message, too, is flashing on the display until an acceptance has been performed after its beginning. Only if neither first nor new messages are indicated, a centralized message is not pending at that point of time. Activate the View submenu to check the status of all single messages contained in the group: View This display provides information on the single messages contained in the group invoked before. Besides, it provides information on the status of each contained single message. Due to the mass of information only one single message is indicated on the display at a time. As the Name selection list contains all single messages of the corresponding group you can switch to the indication of any other single message of the currently selected group. page 52 EnCal 3000
59 Name of selected group Currently indicated single message of the group. A listing with all messages existing in this group opens up if you press the Enter key. You can also switch to the indication of another single message of the group via this selection list. The following information is indicated for each individual message: Name You can identify each message by its parameterized name. Switch to the indication of any other single message of the group via the Name selection list. Type A single message can be derived from a Message, the monitoring of an Upper or Lower limit value or Gradient monitoring. Status The status of a single message is characterized by several specifications: On or Off indicates whether the message is pending. Here, a possibly parameterized minimum pending time is taken into consideration: Even if the status to be signaled is already pending, the related single message will only be set if this status is pending longer than the minimum pending time lasts. To be able to make out whether a single message would be pending if no minimum pending time were assigned to it, the display includes a seconds counter: Seconds counter for minimum pending time If the seconds counter starts counting backwards, the status to be signaled is already pending. A minimum pending time has been assigned to the single message, so the message itself will only be generated if its status is still pending after the minimum pending time has elapsed. The counter therefore constantly shows how many seconds of the minimum pending time are remaining. Only after the counter has reached 0, the status indication of the message will change from Off to On. If the status to be signaled ends before the minimum pending time has elapsed, the counter will be set to 0, but the message will not begin. The counter always shows 0 if a minimum pending time has not been assigned to a single message. In this case the message begins immediately after the status to be signaled has been detected. Whether a single message is being routed at all depends on the fact whether the message is disabled or enabled: If a single message has been disabled, the entire subsequent message processing considers it as not pending. EnCal 3000 page 53
60 Tip: The main advantage of the Groups View menu described here is the possibility of analyzing the status of a group and of the single messages contained therein. This menu only provides information but does not allow changing the properties of a single message, for instance to disable or enable a single message. For this purpose the Single messages menu must be invoked, the display of which is structured similar to the one described above. Single messages The Single messages menu refers to the message processing of the Monitoring module. It does not only serve to indicate basic information relating to single messages but also provides the possibility of disabling such messages via the operator panel of the device and editing limit values for single messages of the measurement monitoring. In order to switch to the display of another single message you have to get into the edit mode (by pressing the Enter key) and select the name of the message you want to view from the appearing listing. Confirm your choice by pressing the Enter key again. The Single messages display is basically identical with the display of the Groups View menu described above. The parameterized limit value is indicated as additional information in case of a message derived from measurement monitoring: Limit The Limit menu item indicates the currently set limit value of the limit monitoring or the maximum permissible change of a measurement within a parameterized monitoring period when monitoring gradients. Limit, here: upper limit value. Note: An additional hysteresis may have been parameterized with the parameterization program via a PC to avoid fluttering messages. This dialog allows disabling single messages via the operator panel. You can also edit the limit value to be monitored in case of messages of the measurement monitoring directly at the device. The user locks, however, must be open for such actions to be carried out. Disabled messages The Disabled messages menu refers to the message processing of the Monitoring module. The corresponding display lists all currently disabled single messages. Additional information indicated on the display comprises the type of the message, the actual message status before the disabling, and possibly the counter for a monitored minimum pending time. Pressing the Enter key opens the selection list containing all currently disabled messages. The Disabled messages menu described here merely provides information. Please switch to the Single messages menu (see above) if you want to disable or enable a single message. This is the last submenu of the Monitoring module: Switches (for changing switch outputs and the revision status) page 54 EnCal 3000
61 The Switches menu has two functions: First, you can monitor and change the status of the revision switch in the corresponding display. Off means that the gas quality measurement is not in the revision status. On means that the revision status is set (at the same time, hint H802 Revision/Test Gas is pending). A revision status can only be changed if the locks are open. The second function of the Switches menu is to display the states of the so-called Switches. A switch is a message with a preset status (on or off). You can change the status of the switch manually, i.e. via the operator panel of the device. Messages of the Switch type can be routed to digital outputs (cf. Chapter 5.5.1) to trigger switching operations of any kind from the EnCal 3000 Controller. Four switches are available (Switch 1 to Switch 4). To change the status of a switch you need to invoke the Switches menu of the Monitoring module. It indicates the current switching status of each switch. Select the switch the status of which you want to edit and get into the edit mode. Select a different switch status and confirm via OK. Changing switch states is subject to the user locks. Note: Message outputs can be parameterized in such a way that they invert the output signal during operation. Please consider that this setting also applies to the output of switches. EnCal 3000 page 55
62 5.4 Integrated RDT Module Function The Integrated RDT) module implements the data connection between the EnCal 3000 Controller and a remote center. The center accesses the data traffic as a logical equal-access station via the integrated RDT during an established data connection. The data transmission is implemented according to the DSfG specification by means of a Class B DSfG interface. If the device is equipped with a DSfG interface, further devices can be connected via this interface. If such a local DSfG bus exists, the connection to the center not only refers to the communication with the entities of the EnCal 3000 Controller but with the entire local DSfG bus traffic. With respect to data communications, the RDT integrated in the EnCal 3000 Controller thus completely replaces an independent DSfG RDT as other devices connected via DSfG can also use it. The parameterization assigns an own bus address (EADR) to the internal Center via RDT entity. 13 The data connection can use one of the following transmission media: 1) Public switched telephone network or GSM wireless network (hardware requirements: modem, COM2 interface) 2) serial direct connection (hardware requirements: null-modem cable, COM2 interface) 3) TCP (hardware requirements: computer network, TCP/IP interface) Independent of the data transmission type, the data connection established by the integrated RDT offers multiple diagnostic and information gathering possibilities. For example, it is possible to poll archive data from a remote location. The RDT, however, can also be parameterized in such a way that a special event (e.g. a gas quality measurement alarm) will trigger a call at the center. This works as follows: According to the DSfG specification, the entities generate attention telegrams in case of special events that are forwarded to all other stations in form of multi-address messages. You can define for each station separately that the center will be informed in case of particular generated telegram types 14. Re 1) Data connection via modem and telephone line or GSM wireless network The data connection usually uses either the public or the company telephone network. If a system is not connected to a public switched telephone network, a connection can be implemented via the GSM wireless network. An external modem is connected to the COM2 interface of the EnCal 3000 Controller for connection to the respective telephone network. In order to check the access authorization of the center, the integrated RDT manages the bus identifier and password of the center (Center identifier). A login procedure is carried out during a call connection. If errors occur during this procedure, each side is authorized to interrupt the connection by hanging up for in this case a faulty connection or an unauthorized access can be assumed. The remote center is only linked via the integrated RDT during an established telephone connection. If the transmission of attention telegrams has been parameterized, the center will spontaneously be called and informed. For this, the integrated RDT has to know the center s telephone number. It is also possible to synchronize the internal device time via the integrated RDT if a server reachable by telephone that provides the time via telephone in accordance with a defined protocol. Should you be interested, please consult Elster to clarify the usability of this functionality in your case. 13 See Footnote 19, page Please refer to Footnote 21, page 56 for the attention telegram types. page 56 EnCal 3000
63 Re 2) Serial direct connection (null-modem cable) In case of a serial direct connection the RDT assumes a continuous connection, i.e. a leased-line operation. The interface hardware is connected by a three-core null-modem cable; control lines are therefore not supported. The RDT is always online, so there is no connection set-up, no login procedure, and no connection tear-down. Telegrams to DSfG Class B can arrive at the RDT at any time and are processed there accordingly, i.e. they are answered by internal bus stations or routed to the local DSfG bus. Attention telegrams from local entities are spontaneously sent by the RDT via the leased line to the center directly after their creation. This operating mode is thus intended for applications for which a continuously established serial direct connection is guaranteed. Re 3) TCP (computer network) The TCP connection type is intended for applications which use a TCP/IP network for the transmission of DSfG data. The easiest way is to imagine this operating mode without the modems and telephone network and with an IP network instead. Only the hardware is exchanged and telephone numbers are replaced by IP addresses. The connection is still a dial-up network (between any IP address of the network and the IP address of the RDT). Like in case of the telephone dial-up network the connection set-up can be initiated by the center or the local RDT. In addition to the IP addresses of RDT and center, the values for the subnet mask and gateway usually used in the IP world and the port to be used for the transmission are special parameters of the TCP connection. In case of this operating mode the preferred service for time synchronization would be NTP, which is a common network service. A center that also supports DSfG queries via TCP/IP network is required for this operating mode; e.g. GW-Remote+. The use of the TCP/IP network is advantageous for applications provided with a nearby IP network. The modem and telephone network can then be saved. EnCal 3000 page 57
64 5.4.2 Display and Operation Main Display (Integrated RDT Module) The main display of the Integrated RDT module indicates the current status of the RDT. The Mode menu item indicates the current operating mode of the RDT (TCP/IP connection, dial modem analog, dial modem GSM, null modem). Status indicates the current RDT status: Status RDT not in operation Explanation The RDT not in operation status may have the following causes: 1. During start up it turned out that the TCP/IP interface is either not available or electrically defective. Additional message: TCP/IP socket/module fault. 2. Hardware error: wrong interface module. Additional message: Module W3150 not recognized. TCP error (TCP/IP operation only) No modem (modem operation only) Modem initialization (modem operation only) Basic status not connected Calling (modem operation only) Call attempt (TCP/IP only) Call connection Identification phase (not in case of a null modem) During operation it turned out that the TCP/IP interface is electrically defective. Additional message: TCP/IP socket/module fault. The No modem status can have two causes: 1. No modem has been connected. 2. The modem initialization has failed. After some time the system will try to initialize the modem again, i.e. it changes to the Modem initialization status again (see below). The RDT tries to initialize the modem directly after start-up. The RDT status changes to Basic status after successful initialization. The integrated RDT is ready for operation but is currently not connected to the center. The integrated RDT calls the center. Additional information is provided on the number of call attempts and the phone number being called. The integrated RDT tries to establish a connection to the center. An external call comes in. The telephone connection is established. The modems are setting up the connecting protocol. During the Identification phase the center and bus identifiers are exchanged and checked. The data connection via the modems has already been established. The operator is informed about when the telephone connection was established. Moreover, the telephone number of the station to which the connection has been established is indicated, provided the number is known. In case of a TCP/IP connection the display shows the host IP and the dynamically allocated port number instead. page 58 EnCal 3000
65 Status Transparency mode Call delay time (modem operation only) Long-term block (modem operation only) Explanation Connection set-up and login procedure have been completed successfully. Exchanging data is possible. The operator is informed about when the telephone connection was established. Moreover, the telephone number of the station to which the connection has been established is indicated, provided the number is known. In case of a TCP/IP connection the display shows the host IP and the dynamically allocated port number instead. The RDT has attempted to call the center, but the connection could not be established. Now the dialing is interrupted by a parameterized Call delay time before a new call will be initiated. The display also indicates which call delay time is currently pending and how long it will last. The maximum number of call attempts can be parameterized. If the connection has not been established yet after this number of call attempts was performed, the RDT is put into a long-term block. All attention telegrams are rejected as long as the long-term block lasts. Time query calling (modem operation and telephone time query only) Time query synch. (modem operation and telephone time query only) The integrated RDT calls the phone number for the telephone retrieval of the time standard. Additional information is provided on the number of call attempts and the telephone number of the time server. This status only occurs if time synchronization by time query calling has been set in the parameterization of the RDT. The connection to the parameterized phone number for the telephone time query has been established. The time is now being enquired. This status only occurs if time synchronization by time query calling has been set in the parameterization of the RDT. Subordinate Menu Items (Integrated RDT Module) History The History display lists the last three completed center connections together with start time and duration. RDT Statistics The RDT statistics submenu is a tool for trouble shooting in case of recurring connection errors. The display provides an overview of the reason for and the number of failed connections, sorted following incoming and outgoing calls. Scroll through the listing by means of the arrow keys. Number of failed calls (here: incoming calls with login error) The meaning of the display texts and counters is described below: Text Incoming / outgoing calls without login start Incoming / outgoing calls with login error Failed after redialing (only relevant in case of modem operation) Incoming / outgoing calls without transparency mode Meaning Those calls are counted during which the following error has occurred: Both stations have established the connection logging. The login procedure, i.e. the checking of the access authorization by center and bus identifiers, has not started at all. Indicates the number of calls to which the following applies: The connection has been established via the stations, but the login procedure, i.e. the checking of the access authorization by center and bus identifiers, has failed. Counter for the occurred long-term blocks. Those calls are counted during which the following event has occurred: The stations have established the connection logging and the login procedure has been completed successfully. However, no data was exchanged as the center did not switch into the transparency mode. GSM (only if a wireless modem is connected) EnCal 3000 page 59
66 The GSM display indicates whether a connection to the wireless network is currently established and, if so, it also indicates the measured data signal quality. The data signal quality is indicated as integer on a scale of 0 to 31 according to the convention of the modem manufacturers. The corresponding value is additionally indicated in dbm (see table below): dbm or less dbm dbm dbm or more 99 unknown The minimum data signal quality level depends on the type of the connected wireless modem. Please refer to the corresponding modem manual for further information. Synchronization (only if time synchronization is carried out via telephone time query) A synchronization of the internal device time can also be carried out via the integrated RDT if a server is reachable by telephone that provides the time via telephone in accordance with a defined protocol. If this functionality is used, the Synchronization display contains additional information on the status of the time query. The subordinate menu contains the following item: (only if time synchronization is carried out via telephone time query) Synchronize now With the menu item synchronize now the internal device time can be synchronized immediately. This is only possible if the synchronization status is waiting for end of interval or dialing pause. If the calibration switch is closed, it is impossible to start synchronize now. page 60 EnCal 3000
67 5.5 System Module Functions The System module comprises all basic functionalities of the EnCal 3000 Controller. Inputs (optional) One such basic functionality of the System module is the processing of the input information and transfer of this information to other modules. The availability of input channels depends on the process board equipment of each individual device. Please refer to Chapter for further information to the different input boards. The System module s display offers a special menu for viewing the source as well as the raw and final values of an input signal (cf. Chapter 5.5.2). There is also an own diagnosis display for protocol input channels. Outputs (optional) The EnCal 3000 Controller normally does not contain any output boards. However, there are several process boards that provide output channels available (cf. Chapter 7.2.2). The EnCal 3000 Controller provides a special menu for viewing and checking outputs (cf. Chapter 5.5.2). Checking the outputs is only possible if the locks are open. DSfG (optional) DSfG is a digital interface especially developed for data communications between gas meters (such as gas-net devices). The EnCal 3000 Controller can be equipped with a DSfG interface as an option. The DSfG bus is connected via the connector labeled DSfG on the back of the device. TCP/IP (optional) The TCP/IP interface is used for integrating the device into a standard network installation (for data exchange via Modbus TCP or time synchronization via NTP). Locks The parameter listing of the EnCal 3000 Controller contains various parameters that are not subject to the calibration lock but protected against willful changes by an operational safety mechanism. This protection mechanism is called user or numerical lock. One lock of up to 6 digits can be defined for each of the two contract parties. These locks are opened and closed via the keypad (cf. Chapter 5.5.2). The device parameterization specifies the locks that shall be valid. EnCal 3000 page 61
68 Set Clock / Synchronize Clock If the calibration switch is open, a given time supplied by any source will always be accepted. If the calibration switch is closed, the clock can only be set once within 24 hours and only within a fixed time frame. This time frame is 20 seconds. This restriction applies to all time sources, especially to the manual setting of the clock via the operator panel of the device. The following external synchronization sources are available: 1) synchronization by telephone time query 15 (hardware requirements: COM2 interface and a connected modem) 2) synchronization via NTP (hardware requirements: TCP/IP interface, NTP server within the network) 3) synchronization via GPS (hardware requirements: free MSER2 interface and a GPS receiver in the station) 4) synchronization via DSfG protocol (hardware requirements: DSfG interface and a device in the DSfG bus system that is synchronized via one of the sources 1), 2) or 3)) If the time is adjusted by more than 20 seconds while the calibration switch is open, two warnings 16 will be generated. If the time is synchronized outside the permissible time frame and the calibration switch is closed, the warning W812 Clock synch. failed will be generated Display and Operation Main Display (System Module) The main display of the System module shows basic device information. The following details are indicated: device name with software version product version of the device software serial number of the relevant device check sum for software authentication (will be calculated after the display has been invoked) number of operating hours of the device supply voltage operating temperature IP address of the device (only if you use the TCP/IP module) Subordinate Menu Items (System Module) Device configuration The Device configuration menu item offers the possibility of checking the assignments of all parameters protected by the calibration lock by module (cf. Chapter 4.4, page 17). Inputs The Inputs display makes it possible to view detailed information of message, pulse, current or resistance inputs. After you have activated the Inputs menu item, the first channel of the input board will always be indicated at board location 1. The display indicates the following information: 15 The usability of these procedures in dependence on local conditions has to be clarified in advance with Elster. 16 According to the DSfG specification: W810: Clock set old; W811: Clock set new page 62 EnCal 3000
69 Name Board Channel Phys. Value Input Value Name of the input channel: serves to identify the channel and is parameterized Board location, board type, version number of board software Channel number with operating mode The final value of the respective physical variable with physical unit In case of current inputs: current value in ma In case of resistance inputs: resistance in ohms In case of message inputs: contact closed / open In case of pulse inputs: frequency in Hz To switch to the display of another channel get into the edit mode (by pressing the Enter key) and select the name of the desired input value from the appearing listing. After you have confirmed your choice by pressing the Enter key, the display of the selected board will be invoked. Outputs The Outputs system menu enables you to view the assignment and current status of the output channels, similar to the input channels display. After you have activated the corresponding menu item, details of the first defined output channel will be presented: Name Board Channel Phys. Value Output Value Test Value Name of the output channel: serves to identify the channel and is parameterized Board location, board type, version number of board software Channel number with operating mode The final value of the respective physical variable with physical unit In case of analog values: value for the current output (in ma) calculated on the basis of the final value In case of messages: output contact closed / open In case of pulse outputs: frequency in Hz, number of pulses retained in the pulse buffer Only for output testing (see below) Get into the edit mode by pressing the Enter key to switch to the display of another channel. A listing with the names of all parameterized output channels appears. After you have chosen the desired output channel and pressed the Enter key, the display of the selected channel will be invoked. EnCal 3000 page 63
70 Output testing In addition to just viewing the current process values you can also test the output channels. This means that you can output any current value between 0 and 20 ma via an analog output for testing purposes. You can set a message output to Contact closed or open, and you can have pulses being output via a pulse output for testing reasons. However, only one output can be switched into the test mode at the same time. Proceed as described below: 1) Select the desired output channel, and press the Menu key afterwards. 2) Select the Test on submenu. The Test value line is selected automatically. Press the Enter key to get into the edit mode. If you enter a new value now and confirm it by pressing the Enter key, this value will be output via the selected output. In the activated test mode the Test value indicated in the last line is no longer crossed out. The Output value menu item indicates the output test value additionally. 3) To quit the test mode, press the Menu key again and confirm the Test off menu item. Note: You can also quit the test mode by quitting the current display, for instance via Back or by selecting a different channel. Protocols When measurement and signal transmitters are connected via digital protocols, the Protocols display offers an overview of the most important protocol data, for example data on pressure and temperature sensors connected via HART protocol, on gas meters with encoder totalizer, and on ultrasonic gas meters via Q.Sonic or SICK protocol. The Protocols display also supplies the most important information on the synchronization of the internal time via GPS or NTP for diagnostic purposes. Note: The Protocols display is not intended for host protocols being processed by the Data Exchange module; please refer to the corresponding module display for information on these protocols. page 64 EnCal 3000
71 The following table shows the display structure in case of HART/encoder/Q.Sonic or SICK protocols: Line Legend Content 3 Name: Name of protocol channel 4 I/O: Board / channel indication In case of HART protocol: Board / channel / HART address indication In brackets: Number of successful communication operations; counts continuously upwards when the communication is working. If an asterisk * appears between the board/channel indication and the number of successful communication operations, the data transmission is disturbed (this indication possibly considers a maximum number of admissible communication errors). For example: - Name of protocol channel - Protocol input via board 2 / channel 1; already 236 successful communication operations - Input value: flow rate When an asterisk appears here, the communication is disturbed. At the same time the counter for successful communication operations (in brackets) stops. 5 Depending on the protocol type: Value: ENC: Q: Vf / Vr / Vfs / Vrs: measurement (in case of HART protocol) encoder digit string and priority in digits/m3 flow rate supplied via Q.Sonic protocol SICK gas meter; transmitted totalizers: measuring volume undisturbed forwards (Vf), measuring volume undisturbed backwards (Vr), measuring volume disturbed forwards (Vfs), measuring volume disturbed backwards (Vrs) The shown value is only a valid current value if the data communication is not disturbed, i.e. there is no asterisk in the fourth line between the board/channel indication and the number of successful communication operations (see above). All pieces of data shown in further lines are intended for diagnosis by experts; please refer to the documentations and specifications of the respective measuring instrument manufacturers or contact Elster. EnCal 3000 page 65
72 The Protocols display is structured as shown below in case of time synchronization via GPS or NTP: : Legend Current UTC: Name / I/O or Socket Telegrams Sync. Data Syncr. Last: Lat./Long./Decl. Stratum Clk. Ident. Clk. Offset Rndtr. Delay Content Universal Time, Coordinated: derived from the latest synchronization via GPS and counted upwards based on the device time Name of the input channel to which the GPS receiver has been connected as well as board/channel indication Name of the TCP/IP socket used for time synchronization Counter for incoming telegrams Status indication, valid in undisturbed conditions Counter for successful synchronizations transferred to the System module Device time of the last successful synchronization (considers time zone and daylight savings time adjustment) Position specification (only in case of GPS) The stratum value is a measure for the number of computers to the time reference in the NTP hierarchy Only in case of time synchronization via NTP: Protocol-internal diagnostic information DSfG (only in case of DSfG interface) Activating the DSfG submenu invokes a display listing important DSfG settings as well as information on the status of the DSfG interface and on the bus activity. Operating mode: The operating mode 17 determines the transmission speed on the DSfG bus. Caution: If several devices are connected to the bus, you have to select the operating mode depending on the slowest station. If the bus communication does not work, the EnCal 3000 Controller may have been parameterized with a baud rate that is too high. 17 All DSfG-capable gas-net devices support the following operating modes: baud baud baud baud baud page 66 EnCal 3000
73 Own stations: Own stations lists the bus addresses (EADRs 18 ) of the EnCal 3000 Controller s internal entities 19. Known stations: Known stations indicates the EADRs of all bus stations currently known to the EnCal 3000 Controller. If a general polling 20 has not yet taken place or there is no local DSfG bus available, only the stations within the EnCal 3000 Controller can be known as being connected to the bus. Bus activity: : This line indicates the last activities on the bus. The last 32 activities can be shown, with the very last one always being indicated on the far right. The abbreviations have the following meanings: Upper case letters and special characters: A,...,Z,Ä,Ö,Ü,,_ The EnCal 3000 Controller has received a telegram from this DSfG address. Lower case letters and special characters: a,...,z,ö,ö,ü,ß, The EnCal 3000 Controller has sent a telegram to this DSfG address. Upper case letters highlighted in black: B, F, H, I, L, M, P, W, Y, Z The EnCal 3000 Controller has received an attention telegram of this type 21. Lower case letters highlighted in black: b, f, h, i, l, m, p, w, x, z The EnCal 3000 Controller has sent an attention telegram of this type EADR is the address by which a station identifies itself in the DSfG bus traffic. The upper case letters A to Z and some special characters are used as bus addresses. An unambiguous address assignment is required for a faultless data communication. 19 According to DSfG terminology an Entity is an enclosed functionality within a device. One single entity is not necessarily identical with an enclosed device, as a device may contain different entities with their own DSfG bus addresses. A gas-net F1 flow computer for instance contains one or two Correction entity (-ies) (one per stream), one Data logging entity and additionally one Center via RDT entity if the integrated RDT is used. 20 Each DSfG bus system must contain one station that controls the data communication. This station is called Bus master and has the EADR _. General polling means addressing all permissible bus addresses to update the station list. 21 Each DSfG telegram contains a character for the telegram type (TTY). The telegram type identifiers of the currently valid attention telegram types are the following: Telegram type Bus alarm Freeze request Hint End of billing period Alarm New measurement Parameter change Warning Make-specific meaning Timesynch telegram TTY B F H I L M P W Y Z EnCal 3000 page 67
74 The DSfG menu contains the following subordinate menu item in master operation: Locks General polling If one of the entities within the EnCal 3000 Controller is the bus master (the station with the EADR _ ), you can trigger a general polling via this menu item. If there is no master operation, the menu cannot be activated. After you have activated the Locks menu item, a display is invoked indicating the current status of the user locks. The display is empty if no lock has been defined. New lock digits must always be defined by parameterization.. The submenu contains the following items: Open locks This menu item is crossed out if all locks are open. If at least one lock is closed, you can activate the Open locks menu item by pressing the Enter key. A dialog will be invoked in which you can enter the numerical lock(s): If only one lock has been defined, only one line appears here. Select the lock you want to open in the first step. Get into the edit mode via the Enter key as usual and enter the lock s string of digits. Confirm the code by pressing the Enter key. If the entered string of digits is incorrect, you cannot quit the edit mode via the Enter key. You have to correct the code first (or quit the menu via the rightward arrow key). It is also possible to change the status of just one of two locks. Press the Menu key after you have successfully entered the numerical lock(s). Open the locks via OK or leave them closed by confirming Cancel. Close locks All defined locks are closed. This menu item appears being crossed out and is thus not selectable if all locks are closed. If the calibration switch is open, all locks are automatically open, too, and cannot be closed. page 68 EnCal 3000
75 Set clock A free setting of the device time is only possible if the calibration switch is open. The Set clock menu item is therefore invisible if the calibration switch is closed. The display of the Set clock menu looks as follows: You can re-enter time and date step by step via the numerical keypad in the edit mode, i.e. after you have pressed the Enter key. The time zone menu item offers a selection list (summer/winter time) for you to choose the seasonal time zone as soon as you are in the edit mode. It is also possible, however, to operate the device throughout the year without a seasonal time change. The seasonal time change can be prevented by parameterization. In such a case, the phrase not used appears next to Time zone, and you cannot get into the edit mode here. After having set the time correctly, invoke the menu. Return to the main display without accepting the new time via Cancel. Accept the new time by confirming OK. Synchronize clock The Synchronize clock menu item is visible even if the calibration switch is closed. It is, however, protected by the user lock (numerical code). You can adjust the time once within 24 hours by up to 20 seconds via Synchronize clock. Enter the desired time adjustment in seconds (with a positive sign for setting the clock forwards and with a negative sign for setting the clock backwards). Afterwards, invoke the menu and confirm OK. You cannot enter a synchronization time that is outside the permissible range in the Synchronize clock dialog. This way it is ensured that with the Synchronize clock menu item no Clock synch. failed alarm or warning can be triggered. In principle, re-synchronizations are only allowed once within 24 hours if the calibration switch is closed, even when the adjustment is within the permissible range of ± 20 seconds. This regulation is independent of the synchronizing source (entry via operator panel, DSfG, telephone time query, NTP or GPS). Therefore, if synchronization has already been performed once within the ongoing 24-hour interval by any source, each further manual synchronization attempt will be rejected. The phrase Clock synch. rejected is then indicated in the bottom line of the display for about 10 seconds. Even if the entered adjustment is permissible, it will not be accepted immediately. Setting the clock forwards will only be performed at the 2 nd second of a minute whereas setting the clock backwards at the 57 th second of a minute. That is why the setting will possibly not be carried out before the following minute starts. This prevents the generation of a minute change caused by Synchronize clock, which possibly triggers an archive entry. As long as the time adjustment has not been carried out yet, the bottom line of the display shows the phrase Clock synch. delayed. This message will be replaced by Clock synch. executed at the moment the adjustment starts. Display test You can check whether or not the display and the status LED function correctly by performing the display test After you have activated the Display test menu item, the pixels of the display are alternately switched on and off. At the same time the status LED shows all three colors after each other. Finish the display test via Back. EnCal 3000 page 69
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