Construction Of The Master/Follower Link - ABB ACS880 Firmware Manual

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 ZCU control unit require an additional FDCO
DDCS communication module; drives with a BCU control unit require an RDCO
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
Termination ON
See the hardware manual of the drive for wiring and termination details.
Ring configuration with fiber optic cables
Master
(ZCU) Control unit
FDCO
T R
Where, T = Transmitter; R = Receiver
Termination OFF
Follower 1
(BCU) Control unit
RDCO
CH2
T R
Program features 77
Termination ON
Follower 2
(ZCU) Control unit
FDCO
T R