I can't configure the groups monitor with 01942.

Verify that the group in question has been selected in the control unit menu: Setup> Setup Communicator Interface>Monitor groups. For a Convimar control unit: Setup>Interfaces>Monitor groups. Then you have to provide the communicator with the data relating to the group you want to manage:the index number you will use to identify the group on the communicator;the address of the control unit where the group is configured,and the index number of the group on the control unit.