1. Start a new project.

2. Add device.

3. Select Modbus COM

4. Add Modbus Master.

5. Add Modbus Slave.

Result

6. Now let's modify the Modbus properties.

6.1 Edit the Modbus COM options.

Change it like this to connect with the CUBLOC-MSB later.

6.2 Edit the Modbus Master options.

6.3 Edit the Modbus Slave options.

CODESYS with the ComfilePi