PLC Modbus communication

[huntleight]

1. Yes, it's ok
2. you need to write program code for support HMI, such as use Arduino IDE.
3. write your own code to set slave address.
4. according to your own code.
so all need you write your own software code.

The HMI code was written by someone else and I will be included in that network. How do I catch the incoming data? Is it like this: Serial2.read()