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FLOWCOMP GAS-NET C2 Technical Documentation Manual

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DSfG Gateways C1 and C2
Series 2
Technical Documentation
Function, operation,
commissioning and maintenance
©2007 Elster GmbH
September 2007

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Summary of Contents for FLOWCOMP GAS-NET C2

  • Page 1 DSfG Gateways C1 and C2 Series 2 Technical Documentation Function, operation, commissioning and maintenance ©2007 Elster GmbH September 2007...
  • Page 2 Copyright: © 2007 Elster GmbH GAS-WORKS, Z1 and FLOW COMP are German registered trademarks of FLOW COMP Systemtechnik. Microsoft, Windows and Windows NT are registered trademarks of Microsoft Corporation. Elster GmbH Schlossstrasse 95a D - 44357 Dortmund, Germany Tel.: +49 - 2 31 - 93 71 10 0 Fax: +49 - 2 31 - 93 71 10 99 E-Mail: systems@elster-instromet.com...

  • Page 3: Table Of Contents

    Contents Safety and warning notes..................v General Notes on the Structure of this Manual ..........vi Introduction ....................1-1 The gas-net system idea ..............1-1 The gas-net DSfG gateway ..............1-1 How the gas-net DSfG Gateway works ............2-1 Host job list (Data exchange module)..........2-2 DSfG job list (DSfG module) ............2-2 Foreign Protocols Module (for C2 devices only).......2-3 Simulating a gas quality entity via DSfG...
  • Page 4 Battery Replacement ............... 7-1 Technical data: gas-net C1 and C2 ............8-1 Annex....................... 9-1 Host protocols .................. 9-1 Bibliography ................... 10-1 Index ...................... 11-1 gas-net C1 and C2 Page iv...

  • Page 5: Safety And Warning Notes

    Safety and warning notes Attention! The following safety and warning notes must be observed: • The gas-net C1 and C2 devices must neither be stored at temperatures below -20°C nor above +50°C. • A temperature between 0°C and +40°C must be guaranteed during operation.

  • Page 6: General Notes On The Structure Of This Manual

    General Notes on the Structure of this Manual The documentation on hand describes the gas-net C1 and C2 DSfG Gateways. As the description holds mostly for both devices, C1 and C2, we refer generally to the device 'gas-net DSfG gateway'. In short, the functional differences between C1 and C2 are the following: •...

  • Page 7: Introduction

    Introduction 1 Introduction 1.1 The gas-net system idea is the generic term for a whole device family. All gas-net devices, including future device types, stand out due to a uniform appearance, operation and parameterisation. The FLOW COMP devices, each by itself, always cover a multitude of measure- ment and control functionalities.
  • Page 8 Introduction Correction Correction DSfG Host Telecontrol centre Gateway Data logging digital Telecontrol line connection DSfG Typical system structure with an integrated gas-net C1 DSfG gateway In summary, the gas-net DSfG gateway accomplishes the following tasks: • Cyclic or event-driven data polling at DSfG stations. Conversion of this data into the host protocol, and its transmission to the host computer.

  • Page 9: How The Gas-Net Dsfg Gateway Works

    Method of operation 2 How the gas-net DSfG Gateway works The illustration below shall explain how the gas-net DSfG Gateway works in principle. The comprehension of the way the gas-net gateway works is essential for the following description of the device operation and parameterisation. Import values Export values Transfer...

  • Page 10: Host Job List (Data Exchange Module)

    Method of operation 2.1 Host job list (Data exchange module) The job list of the host describes all data flows to be processed between host and gas-net DSfG Gateway. The system distinguishes between the flow direc- tion to the host (data export) and the flow direction from the host (data import). The data transport in the direction to the host is processed cyclically.

  • Page 11: Foreign Protocols Module (For C2 Devices Only)

    Method of operation arrival of an attention telegram . You can also collect the most recent entry of a standard query . Finally, the processing of each individual query telegram can be blocked. This function is useful if the associated DSfG station is temporarily not in operation.

  • Page 12: Counters Module

    Method of operation quality analyser itself. Thus, a gas quality analyser is being simulated for the DSfG entities interested in gas quality data (e.g. for volume correctors). It pro- vides a new analysis each time an analysis is supplied via the host. 2.5 Counters module The M1’s counting function may file counters for different physical values, com- prising Counters and Totalizing counters.
  • Page 13 Method of operation The following table shows useful combinations for counters being weighted with a conversion factor: Input value Target Factor for counter k-ratio calculation value method V or Q k=const or SGERG *Z *Hs k=const or SGERG *Z *Rho k=const or SGERG V or Q no correction...
  • Page 14 Method of operation course of time. The original totalizer is thus not just automatically transferred to the created totalizer. This is important because a possible running backwards of the intercalated totalizer must be prevented. An intercalated totalizer will fluctuate around the original totalizer when the flow rates are changing.

  • Page 15: Integrated Rdt Module (For C2 Devices Only)

    Method of operation negative quantities will be subtracted as soon as the total increment is positive again. The negative quantities can be deleted with a menu command. In addition, accumulated negative quantities of a totalizing counter are always deleted when the counter changes from the disturbed to the undisturbed status.
  • Page 16 Method of operation Public switched telephone network or GSM wireless network (hardware requirements: modem, COM2 interface) Serial direct connection (hardware requirements: null-modem cable, COM2 interface) 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 possi- bilities.
  • Page 17 Method of operation 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 line-bound telephone network, a con- nection can be implemented via the GSM wireless network.
  • Page 18 Method of operation Re 3) TCP (computer network) The TCP connection type is intended for applications which use a TCP/IP net- work for the transmission of DSfG data. The easiest way is to imagine this oper- ating mode without the modems and telephone network and with an IP network instead.

  • Page 19: Device View And Design

    The housing of the gas-net C1 is designed as slide-in unit for a 19”-frame with a width of 1/6, the gas-net C2 device has a mounting width of 1/3 or 1/2. The front panel of the device contains the following operating and display elements: •...
  • Page 20 Modbus TCP or time synchronization via NTP) Additionally, the C1 provides a slot for a gas-net process board (typically, a serial process board MSER2 is installed here). A gas-net C2 device with a mounting width of 1/3 accommodates up to four process boards.

  • Page 21: Gw-Gnet

    GW-GNET+ 4 GW-GNET+ gas-net devices are always parameterised via the GAS-WORKS software system with a PC or laptop. All gas-net devices are parameterised with the same GAS-WORKS module, called GW-GNET+. The next two sections generally explain how to create or edit a complete gas-net parameterisation using GW-GNET+ and how to export it to the device.
  • Page 22 GW-GNET+ Invoke the GW-GNET+ module by clicking the New – Create gas-net parameterisation tool in the toolbar. Alternatively, you may select the Tools – New – Create gas-net parameterisation menu item from the main menu. Select the device type you want to parameterise in the appearing dialog box and in the next step the version number of the device software.

  • Page 23: Importing And Editing A Parameterisation: Brief Description

    GW-GNET+ Connect the DSS data interface at the device to a COM computer interface using a parameterisation cable. Turn the user switch at the device to “open”. 10. Mark the parameter data record and select the Data – Export menu item from the main or context menu of GAS-WORKS.
  • Page 24 GW-GNET+ After the reading in has been finished, you can close the communication program via the main menu item File – Exit. The parameter data record is filed in the GAS-WORKS worksheet under the specified name. Before you can start GW-GNET+, you have to file this data record away in the hierarchy.

  • Page 25: Extras: Gw-Gnet+ Service Programs

    GW-GNET+ 4.3 Extras: GW-GNET+ service programs The GW-GNET+ program includes some additional service programs fulfilling different tasks relating to gas-net devices. The range of available service pro- grams depends on the gas-net device type. For instance, the following tools are available for gas-net C1 and C2 devices: for changing the parameterization during an estab- Edit lished data connection to the device.

  • Page 27: Installation

    The gas-net devices are designed for mounting in a 19”-cabinet; the gas-net C1 has a mounting width of 1/6 whereas the width of the gas-net C2 is 1/3. A mounting depth of 170 mm must be taken into consideration to leave the ter- minals on the back accessible.
  • Page 28 Installation 5.2.2 MSER2 Serial Process Board The MSER2 serial process board provides two interfaces supporting V24 (RS232) as well as RS422 and RS485. The table below shows the assignment of the individual pins: Signal Assignment RS232: Transmitted data RS232: Received data RS422/RS485: Received data (B) RS422/RS485: Received data (A) RS422/RS485: Transmitted data (B)
  • Page 29 Installation 5.2.4 DSfG interface (optional) The DSfG protocol is an internal protocol for gas meters for data transmission between devices of the gas-net series. The DSfG interface is a SUB-DB 9 male connector located on the back of the device. Secure the connector with screws. 5.2.5 TCP/IP Interface (optional) The TCP/IP interface is an RJ45 socket at the back of the device.
  • Page 30 Installation Signal ground used for RK512/3964R and MODBUS Data set ready Request to send Clear to send Ring indicator Screen Chassis has the same potential as the protective ground In case of a C2 device, the COM2 interface may be used for the connection of the modem or null-modem cable for the functionality of the integrated RDT.
  • Page 31 Installation The following specifications are guidelines: Field strength Suitable antenna High omnidirectional dipole antenna with mounting base flat omnidirectional antenna, also for external Medium to low mounting and for mounting on metal surfaces directional antenna for pole mounting The length of the antenna cable to be ordered depends on the distance between modem and antenna.
  • Page 32 Installation Connection of the Siemens M20 / TC35 Wireless Modem to 24 V Unfortunately, no generally valid color- coding details can be given for the connection of the M20 or TC35 wireless modem to 24 V DC. Due to the variety of different cables supplied, it is not possible to guarantee a uniform color coding.

  • Page 33: Commissioning

    Commissioning 6 Commissioning 6.1 Device Parameterisation A complete parameterisation as well as a modification of all parameters are executed via PC / laptop computer. The parameter data record is created by means of the parameterisation software GW-GNET+. Note: Please refer to Chapter 4 for a brief instruction on the parameterisation by means of the GW-GNET+ program.

  • Page 34: Commissioning The Integrated Rdt

    Commissioning • Plug in the connector that establishes the connection to the host at COM2 on the back of the gas-net device now. If the connection is physically and logically okay, the data connection must be established instantaneously if the host has been switched on and configured accordingly. You may recog- nise this by the lighting up of the Data to Host/Data from Host LEDs on the front of the DSfG gateway.
  • Page 35 Commissioning Please pay attention to the consistency of the parameter data record; it is espe- cially important to choose the correct modem. Different procedures are necessary for commissioning the integrated RDT, depending on the operating mode (dial-up line, GSM modem or TCP/IP net- work).
  • Page 36 Commissioning Call your center and verbally announce the connection test. Switch the device off and immediately on again; this way you avoid the call delay times that may have been activated already and thus a waiting period. Then plug the cable into the TAE socket outlet. If a routing job has already been pending, the RDT establishes the con- nection to the center.
  • Page 37 Commissioning GSM Wireless Modem: Important note: Before starting with the commissioning of the integrated RDT, make sure the accurate PIN number of the SIM card has been set in the parameterization of the gas-net device (Integrated RDT module). The reason is that the entry of a wrong PIN is only possible twice;...
  • Page 38 Commissioning to check. Call your center now and announce the connection test. If a routing job has already been pending, the RDT establishes the connec- tion to the center. If this is not the case, you have to trigger an event that induces the RDT to call first;...
  • Page 39 Commissioning now have to establish a connection to the IP address of your RDT with their data polling tools (which must support DSfG connections via network) and check the data polling. Once the connection has been successful, the main menu of the Integrated RDT module indicates the status change of the RDT.

  • Page 41: Maintenance

    Maintenance 7 Maintenance gas-net devices do not require much maintenance. 7.1 Battery Replacement The device battery mainly runs down when the device is switched off. The bat- tery consumption can be neglected as long as the device is switched on. The battery should therefore be replaced after 5 years when in the meantime the device has been switched off for a longer period of time.
  • Page 42 Maintenance Note: When inserting the battery, pay attention to the correct polarity: The positive pole (+) must point downwards! A wrong polarity will not be noticed at first, but during the next power failure that lasts more than 15 minutes the device data will be lost.

  • Page 43: Technical Data: Gas-Net C1 And C2

    Technical Data 8 Technical data: gas-net C1 and C2 Device type Electronic DSfG gateway. Housing Plug-in unit in 19”-design, 3 height units, 1/6 mounting width (C1 devices) or 1/3 mounting width (C2 devices) for swing frame mounting. Mounting depth without connectors: approx.
  • Page 44 Technical Data Parameterization Commissioning and parameterization via the PC software GAS-WORKS. Para- meter data records can be stored, documented and managed in the PC under GAS-WORKS. Page 8-2 gas-net C1 and C2...

  • Page 45: Annex

    Annex 9 Annex 9.1 Host protocols 9.1.1 RK512 / 3964R The gas-net DSfG gateway supports the protocol consisting of 3964R (data link layer) and RK512 (data presentation). Look up the settings of the protocol parameters in exactly this form in the manu- als of the programmable controller, and adjust them in the communications processor procedure.
  • Page 46 Annex This is why in the GW-GNET+ interface the positions for import and export val- ues are not indicated in the DB/DW form but as serial register numbers. We therefore recommend to switch to the 3964R protocol type in the program's surface first, if necessary, and then to position the export data points or import values during the creation of the parameterisation.
  • Page 47 Annex Error S5/S7 Error Cause of error number designation ------------ OK telegram after SEND Memory access A data block has been addressed, which does not correspond with the data block of an RK512 job. The first addressed data word is not within the data area of the addressed data block.
  • Page 48 Annex 9.1.2 MODBUS RTU / MODBUS ASCII The Modbus protocol is supported, for instance, by the PLC series of AEG Modicon. The data presentation according to the Modbus protocol is one-dimensional. The smallest data unit in the memory consists of 16 bits. The protocol contains a number of registers, which are numbered consecutively from 0 up and each of which may contain exactly such a 16-bit word.
  • Page 49 Annex Error Modbus error Cause of error number designation illegal function The telegram type received is not permissible, i.e. it is neither of the 03 nor of the 16 telegram type. Only Modbus telegram types with the functional numbers 03 (= read holding registers) or 16 (= preset multiple registers) are needed in the gateway;...

  • Page 51: Bibliography

    Bibliography 10 Bibliography • Technische Spezifikation für DSfG-Realisierungen, Gas-Information Nr. 7, 1. Überarbeitung 05/00 (Technical Specification for DSfG Implementations, Gas Information No. 7, 1st revision 05/00), only available in German Order no.: ISSN 0938-6114 Publisher: DVGW, Postfach 140362, D-53058 Bonn, Germany, May 2000 Sold by: Wirtschafts- und Verlagsgesellschaft Gas und Wasser mbH, Postfach 140151, D-53056 Bonn, Germany...

  • Page 53: Index

    Index 11 Index DSfG Gateway Tasks 1-2 Battery replacement 7-1 DSfG module 2-2 Bibliography 10-1 DSS 5-2 Gas quality entity Front panel 3-2 Simulating 2-3 C1, C2 gas-net Device view and design 3-2 Introduction 1-1 GQ simulation module 2-3 Installation 5-1 GSM wireless modem Technical data 8-1 Antenna 5-5...
  • Page 54 Index Modbus protocol 9-4 Safety and warning notes v MSER2 5-2 Serial process board MSER2 5-2 Parameterisation 4-1 Creating 4-1 TCP/IP interface 5-3 Totalizing counter 2-6 Import 4-3 Pin assignment COM2 5-3 Wireless modem M20 / TC35 Connection to 24 V 5-6 Null modem 2-9 RK512/3964R protocol 9-1 gas-net C1 and C2...

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Gas-net 2 seriesGas-net c1

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