Protocol ‘COMx - Modbus’

See protocol description for the serial interfaces COM1 and COM2 Setting_COMx_Modbus: Setting COMx - MODBUS

The address assignment as well as a detailed description of all implemented MODBUS functions can be found in the chapter of Communication with MODBUS RTU .

In the CM574-RS, 128 kB data are available in the addressable flag range %M. This way, the entire MODBUS address range 0000hex .. FFFFhex can be covered.