LEGRAND Server Technology PRO3X User Manual page 188

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Modbus Gateway:
If connecting the Modbus RTU devices to PRO3X and enabling the Modbus Gateway feature, the
Modbus TCP clients on your network will be able to communicate with those Modbus RTU devices
attached to PRO3X.
1) To allow the Modbus TCP clients on the network to communicate with the Modbus RTU devices
connected to the PRO3X, select the 'Enable Modbus gateway' checkbox.
2) Now configure the fields shown.
Field Description
TCP port
Use the default port 503, or assign a different port. Valid range is 1 to 65535.
Note: Port 502 is the default Modbus/TCP port for PRO3X, so you
cannot use that port for the Modbus Gateway.
Parity,
Use the default values, or update if the Modbus RTU devices are using
different communication parameters.
Line speed
Default
If the Modbus TCP client does not support Modbus RTU unit identifier
address addressing, enter a Default Address.
If you must provide a unit identifier address:
• •
Only one Modbus RTU device is supported.
• • The unit identifier address you provide is applied to the Modbus RTU
device connected to PRO3X.
Note that each Modbus RTU device's unit identifier address must be
unique.
Warning: If the connected Modbus RTU device's address does not
match the address entered in this field, communications between
the Modbus TCP clients and Modbus RTU device fail.
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