normal RUT955 as modbus gateway

  • Constantin
  • Constantin's Avatar Topic Author
20 Jun 2017 12:21 - 20 Jun 2017 12:22 #974 by Constantin
Constantin created the topic: RUT955 as modbus gateway
I need a little technical help.
I have one Rut955 router, and I need to set it as Modbus gateway to Carlo Gavazzi EM340. I mention that I can read the EM340 via RS 485 (2 wire) with a RS485/USB adapter. I have tried to connect as described in the router manual (with and without terminal jumper).

The setting for the router RS485 are :

Can you help me with an advise, please?
20 Jun 2017 12:22 #975 by marcom
marcom replied the topic: RUT955 as modbus gateway
Dear mr. Constantin,

in router configuration set 

Listening IP:
Slave ID configuration type: Obtain from TCP

In this way router listen for ModbusTCP requests on all interfaces and forward on serial port exactly same packet (converted from Modbus TCP to Modbus RTU) as one received on port 502.

If you need more help, please let me know.
Best regards

Marcom S.r.l.
via Mezzacampagna, 52 int.29
37135 - Verona (VR)
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