Modbus Mode - ABB ARR600 User Manual

Section 10
Modbus application settings
10.2
44

Modbus mode

Network master to serial slaves
RS422/485
GUID-0F99AFF8-EEF0-4D81-80DD-72CF8104F053 V2 EN-US
Figure 9: Network master to serial slaves mode
In the "Network master to serial slaves" mode, the device acts like network server
where masters (clients) can connect (the default port being 502) and transmit
Modbus requests. The device makes conversions between network and serial
protocols. If the slave does not reply during defined timeout or if the reply is
corrupted, the device sends "gateway exception message" back to the master if the
exception generation is enabled. Otherwise, the reply is returned. Multiple masters
can connect simultaneously to the Gateway, which handles the multiplexing
between masters.
TCP/IP
PLC Modbus slaves
1MRS758458 F
Modbus master
ARR600
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