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
XD2D
XD2D
XD2D
1
2
3
4
B
A
BGND
SHIEL
D
1
2
3
4
B
A
BGND
SHIEL
D
1
2
3
4
B
A
BGND
SHIEL
D
Termination ON
Termination ON
Termination OFF
See the hardware manual of the drive for wiring and termination details.
Ring configuration with fiber optic cables
R
T
R
T
R
T
RDCO
CH2
FDCO
(ZCU) Control unit
FDCO
(BCU) Control unit
(ZCU) Control unit
Master
Follower 1
Follower 2
Where, T = Transmitter; R = Receiver
Program features 77
Содержание ACS880 Series
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