Chained Multicast Messaging - ABB ACS850 Manual

356 Drive-to-drive link

Chained multicast messaging

Chained multicasting is supported for drive-to-drive reference 1 and Control word by
the firmware.
The message chain is always started by the master. The target group is defined by
parameter 57.13 Next ref1 mc
parameter 57.12 Ref1 mc group
mc grp in the master.
If a follower has parameters
same value, it becomes a submaster. Immediately after a submaster receives the
multicast message, it sends its own message to the next multicast group defined by
parameter 57.13 Next ref1 mc
The duration of the entire message chain is approximately 15 microseconds
multiplied by the number of links in the chain (defined by parameter
grps in the master).
grp. The message is received by all followers that have
set to the same value as parameter
57.03 Node address
grp.
and 57.12 Ref1 mc group
57.13 Next ref1
set to the
57.14 Nr ref1 mc