RMG ERZ2000-NG, Operating Manual

Page: 158 / 454

4 Communication and bus systems
Manual ERZ 2000-NG · EN07 · 2019, May 13th
148
Figure 105: Serial interfaces
Modbus is, depending on the version, available on COM 1 ( RS 232, 422 or 485, de-
pending on the hardware setting), on COM 2 (RS 232) and on COM 3 (RS 232 or
485). An additional Modbus interface is available as Modbus IP on jack RJ45, Ether-
net TCP/IP.
Special forms of the Modbus or parts of the settings are described in the appendix.
The relates to the EGO Modbus (
appendix .J.2.2 Modbus EGO
), a special interface
for Erdgas Ostschweiz, the Transgas Modbus (
appendix .J.2.3 Transgas Modbus
)
and the EON Gas Transport Modbus (
appendix .J.2.4 Eon gas transport Modbus
), a
Modbus for the Gascade company.
4.3.2 Modbus master overview
The ERZ2000-NG can receive the gas composition data from up to 2 process gas
chromatographs (
Fehler! Verweisquelle konnte nicht gefunden werden. ). For this
purpose, 2 Modbus masters have been implemented, which are listed in menus IL
and IM (
Figure 108: IL Modbus master for the PGC (gas analysis)
). The PGCs oper-
ate as Modbus slaves. The participating devices can be
coupled
via: