Transmission Protocols; M900 Protocol; Dsfg-B Protocol; Modbus Protocol - RMG EC 900 Operating Instructions Manual

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Transmission protocols

M900 protocol

The M900 protocol (MRG 910/EC 694 protocol) has been implemented (enhanced functionality) so
that the Dialog 900 service program can be used.

DSfG-B protocol

The DSfG-B protocol is implemented in the CU as standard. The device has been prepared to im-
plement SELMA in conjunction with DSfG-B. For DSfG data element identifiers, see the separate
documentation for data transmission.

Modbus protocol

The Modbus protocol can be used directly via the RS 485 interface of the MU or via the CU (point-
to-point connection also via RS 232 or the optical interface).
The Modbus implemented directly via the RS 485 interface allows the corrector to be connected,
for example, to a telecontrol substation (no telecontrol protocol).
For Modbus addresses, see the separate documentation for data transmission.

Communication unit (CU)

The corrector can be fitted with a communication unit. This communication unit is connected via
the internal Modbus and is used not only for transmitting data but also for outputting measured
values (current and pulse outputs).
For remote data transmission, it supports all common modems and transmission paths:
Analogue
ISDN
GSM
GPRS
Ethernet
RS 485 / RS 232
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CONSTRUCTION AND FUNCTION
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