I've been struggling with the programming of the Viessmann 5211 decoders on a CS1. Looking at the instructions for the 5211 they refer to Group, Number and Address. I;ve set the sitches to 1---5--8 but and the table shows this corresponds to four addresses 129-132. The CS1 instructions require an address. I'm assuming for that particular accessory I can enter either of these four addresses?. Does anyone know what the purpose is of Groupe and Number as shown in the instructions.