KNX/EIB KNX-Powerline, Main-responder-Flag

[Frank_Mer]

Die Bedeutung des Group-responder-Flags ist mir klar, aber was ist denn der genaue Sinn des Main-responder-Flags beim PL?

Frank

[S. De Bruyne]

The Main Responder Flag only plays a role when the length of the Group Address Table is set to 0. In that case, when the length of the Group Address Table is 0, the device accepts all group telegrams and does not evaluate the Group Address Table. This is only meaningful in interfaces towards ETS, visualisation tools, etc.
If now the Main Responder Flag is set, the device will in this case acknowledge (ACK) all Group Telegrams; if it is not set it will not acknowledge any Group Telegram.
Obviously, this is to be used with care: if the Main Responder Flag is set in one device, and also the Group Responder Flag is set in another device for a Group Address, then two acknowledges will be sent on that Group Address, which will destroy each other.

[Frank_Mer]

Vielen Dank