Dsfg Module, Data Exchange Module - Elster gas-lab Q1 Technical Documentation Manual

Functional description

5.6 DSfG module, Data exchange module

(Gateway functionality, not available with all software
variants)
The DSfG protocol is a digital data protocol, especially developed for the
communication between gas meters in gas measuring and regulating stations.
The gas-net Q1 is always equipped with a DSfG interface. All important
measurements and characteristic data are provided as DSfG data elements via
the DSfG protocol according to the specification. These data elements are
addressed via special addresses.
However, gas measuring and regulating stations often also contain a PLC
(programmable controller) the tasks of which are the open- and closed-loop
control of the station and the telecontrol interfacing to a remote control centre.
Most of the PLCs are not DSfG-capable but use other digital communication
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protocols . Consequently, they cannot be simply included in the DSfG station
group. In such cases a protocol interfacing between DSfG and host protocol is
necessary (gateway functionality).
This functionality is only available in Q1 software variants containing the DSfG
and Data exchange modules.
5.6.1 DSfG module (O
The optional module controls the DSfG side of data exchange.
If you need further information, please contact your local agent.
Please see
www.elster.com
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Typical protocols are, for instance, 3964R/RK512 (e.g. in case of Siemens S5/S7) or
Modbus-RTU (e.g. in case of Cegelec Modicon).
gas-lab Q1
ptional feature for the European market)
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