• For distances up to 1000 m, use two NOCR-01 optical converter/repeaters with
glass optic cable (GOF, 62.5 micrometers, Multi-Mode)
• Maximum shielded twisted-pair cable length: 50 m
• Transmission rate: 4 Mbit/s
• Total performance of the link: < 5 ms to transfer references between the master
and followers.
• Protocol: DDCS (Distributed Drives Communication System)
Settings and diagnostics
Parameter groups: 60 DDCS communication (page 441), 61 D2D and DDCS transmit
data (page 457) and 62 D2D and DDCS receive data (page 462).
Events: 7582 M/F comm loss (page 557) and A7CB M/F comm loss (page 572).
￭ External controller interface
General
The drive can be connected to an external controller (such as the ABB AC 800M) using
either fiber optic or twisted-pair cable. The ACS880 is compatible with both the
ModuleBus and DriveBus connections. Note that some features of DriveBus (such as
BusManager) are not supported.
Topology
An example connection with either a ZCU-based or BCU-based drive using fiber optic
cables is shown below.
Drives with a ZCU control unit require an additional FDCO DDCS communication module;
drives with a BCU control unit require an RDCO or FDCO module. The BCU has a
dedicated slot for the RDCO – an FDCO module can also be used with a BCU control
unit but it will reserve one of the three universal option module slots. Ring and star
configurations are also possible much in the same way as with the master/follower link
(see section Master/follower functionality (page 34)); the notable difference is that the
external controller connects to channel CH0 on the RDCO module instead of CH2. The
channel on the FDCO communication module can be freely selected.
42 Program features
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