Universal Modbus TCP/RTU Slave

[rw_echo]

When LM is used as a Modbus TCP slave station, what kind of communication data is exchanged? For the code "registers = { [1] = '1/1/4' }", I want to write different values (1, 2, 3, etc.) to the data address 1. What would be the corresponding message? Could you give me a couple of examples? Thank you.

[admin]

What is your task? If you want to exchange data between two LMs then use MQTT. Modbus is not the best approach for this.

[rw_echo]

What is your task? If you want to exchange data between two LMs then use MQTT. Modbus is not the best approach for this.

No, I'm not trying to implement two LM remote data exchange. Instead, I want to know what the format of the control message frames is when LM acts as a Modbus TCP slave station?

[admin]

It's Modbus TCP protocol, what else could it be?

https://en.wikipedia.org/wiki/Modbus#Modbus_TCP