ABB ACS880 Firmware Manual page 77

To indicate faults in the followers, each follower must be configured to transmit its
status word as one of the above-mentioned data words. In the master, the
corresponding target parameter must be set to
when a follower is faulted is selected by
(see parameter group
bits of the status word.
Block diagrams of the master/follower communication are presented on pages
and 661.
Construction of the master/follower link
The master/follower link is formed by connecting the drives together using either
• shielded twisted-pair cable between the XD2D terminals of the drives*, or
• fiber optic cables. Drives with a
DDCS communication module; drives with a
module.
*This connection cannot co-exist with, and is not to be confused with, drive to drive (D2D)
communication implemented by application programming (detailed in Drive application
programming manual (IEC 61131-3), 3AUA0000127808 [English]).
Connection examples are shown below. Note that a star configuration using fiber
optic cables requires an NDBU-95C DDCS branching unit.
Master/follower wiring with electrical cable
Master
Termination ON
See the hardware manual of the drive for wiring and termination details.
60.17 Follower fault
31 Fault functions) can be used to indicate the status of other
ZCU control unit require an additional FDCO
Follower 1
Termination OFF
Standard program features 77
Follower SW. The action to be taken
action. External events
BCU control unit require an RDCO
Follower n
Termination ON
660