LEGRAND Raritan PX3TS User Manual page 366

Chapter 7: Using the Web Interface
346
Field Description
Use the default port 503, or assign a different port. Valid range is
TCP port
1 to 65535.
Note: Port 502 is the default Modbus/TCP port for PX3TS, so you
cannot use that port for the Modbus Gateway.
Use the default values, or update if the Modbus RTU devices are
Parity,
using different communication parameters.
Line speed
If the Modbus TCP client does not support Modbus RTU unit
Default
identifier addressing, enter a Default Address.
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 PX3TS.
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.