Appendix B – Drive-to-drive link395Follower multicast messaging (write only)This type of messaging is for point-to-point communication between followers. Afterreceiving a token from the master, a follower can send one dataset to anotherfollower with a follower multicast message. The target drive is specified using thenode address.Note: The data is not sent to the master.Standard multicast messaging (write only)In standard multicast messaging, one dataset can be sent to a group of driveshaving the same standard multicast group address. The target group is defined bythe D2D_Conf standard function block (see page 301).The sending drive can either be the master, or a follower after receiving a token fromthe master.Note: The master does not receive the sent data even if it is a member of the targetmulticast group.FollowerDataset table(LocalDsNr) TargetNode = X57.03 NODE ADDRESS = XFollowerDataset table(RemoteDsNr)MasterDataset tableTokenFollowerDataset table(RemoteDsNr)Target Grp = X57.12 REF1 MC GROUP = XFollowerDataset table(RemoteDsNr)MasterDataset table(LocalDsNr)Master-to-follower(s) multicasting57.12 REF1 MC GROUP = X
