Modbus Settings in the Controller Using Device Profiles

All Modbus communication settings for the controller are accessible through the Modbus tab. Device profiles play a crucial role in mapping Modbus addresses (registers) to KNX group objects. If you need to read or write a Modbus register, simply configure the mapping rules, allowing you to access the register via KNX group objects.

Here is a step-by-step guide for Modbus communication settings:

1. Modbus RTU configuration:

   • Specify the details for Modbus RTU communication, such as baud rate and parity.

   • This step applies if you’re using Modbus RTU.

2. Device profile upload:

   • Ensure that a device profile is uploaded in the controller.

   • Preinstalled profiles for Schneider-Electric devices are available, and you can also upload custom Modbus profiles.

3. Add the device:

   • Add your Modbus device to the device list.

4. Register mapping:

   • Configure the mapping between Modbus registers and KNX group objects.

5. Automatic discovery:

   • To find Modbus devices connected to the controller via Modbus RTU, use the scan function.

   • Access it here: Configurator → Modbus → RTU scan.

   • Devices marked as RTU scan = No do not support automatic discovery.