I need to make a system with bidirectional communication between two RUT955 over TCP/IP. Both RUT955 receives data from its PLC via Modbus RS485 and sends data to a partner RUT955 which transfers data to its PLC over modbus RS485 (please see the attached file).
I tried doing all as mention in this example: "Bidirectional communication between two serial devices over TCP/IP" (https://wiki.teltonika-networks.com/view/Bidirectional_communication_between_two_serial_devices_over_TCP/IP
). The idea in the example is the same as I need, only that I use rs485 instead of RS232. The only thing that i do different from the mentioned example is that I choose RS485 communication.
Also for the testing I configured both RUT955 in the local network, although later I will need to make a VPN tunnel between them.
Any suggestions on how to configurate the routers or where could be the problem?
I also can't find any diagnostics data on router to understand if it tries to send something or no. The only thing I tried is to connect a modbus testing device and according to it Master RUT955 sends data (only tx led is flashing) and client RUT955 does nothing (nor tx, nor rx led are flashing).
Will greatly appreciate all the help!