Question

Hello,

is it possible to use the rut955 as a Modbus TCP gateway. I have several Modbus RTU devices connected via RS485 to the Rut955. I would like to read out values from these RTU devices from my remote SCADA system.

I´ve just found an option to send the data via JSON File. This would be a push method.

Reading out the Rut955 via Modbus seems to be possible just for Router parameters, but not for connected slaves.

Greetings Chris

Comments

Hello, it's possible but be carefull, modbus deamon can crash randomly after a reboot of RUT :
See https://community.teltonika-networks.com/18434/rut955-rs485-modbus-gateway-crash-after-reboot?show=18434#q18434

Answer 1

• Set the port as Modbus Gateway on your rut (Example: LAN IP 192.168.1.1).
• Ensure that all the RTU devices have unique ID (Address)
• Request connection to 192.168.1.1 with the device ID for the address.

Answer 2

Hi!

Yes, it's possible. In Services - RS232/RS485 section you can configure the Modbus Gateway.

Answer 3

Thank you.

I will try it and come back with results. Also the rebooting issue is good to know about.

Greetings Chris