Modbus TCP Gateway

NETWORKING SOLUTIONS
1

Hi,

Can Teltonika routers function as a Modbus TCP gateway? Specifically, can they connect to an end device that supports only a single Modbus TCP connection, retrieve its values, and then republish them as a Modbus TCP server? Additionally, can multiple Modbus TCP clients (e.g., SCADA systems) connect to the Teltonika router to read and write values?

I checked documentation but i’m still unsure if it’s possible.

Regards,
Martin

3

Hello,

Hello,

Yes, Teltonika routers can function as a Modbus MQTT/TCP gateway. Additionally, when configured as Modbus TCP clients (masters), they can read and write values to/from server (slave) devices.

For more information, including a detailed configuration example, please refer to our wiki article here: Modbus TCP Master MQTT Gateway.

Best regards,

4

I’m not sure if I was clear earlier. What I’m asking is: where in Teltonika’s configuration can you set it up to connect to an end device as a Modbus TCP client, retrieve its values, and then republish those values as a Modbus TCP server? Specifically, how do you map the variables from the Modbus TCP client to the Modbus TCP server within Teltonika’s settings? I couldn’t find documentation explaining this.

5

I appreciate the information you have provided. However, I’m wondering if it might be possible to clarify further. Specifically, I’m looking to understand how to configure a Teltonika router to act as a Modbus TCP client that retrieves values from a server device and then republishes those values as a Modbus TCP server.

Could you clarify where in the Teltonika router’s configuration settings this mapping is done? For instance:

  1. How do you map the variables retrieved by the Modbus TCP client to the Modbus TCP server?
  2. Is there documentation or a step-by-step guide that explains this exact setup?

Your earlier wiki article reference is helpful, but I couldn’t find details specific to this scenario.

Looking forward to your clarification!