ABB ACS580MV, Commissioning Manual

Page: 129 / 150

Option 129
Successful example for reference as below:
Master/follower functionality
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Contents of this chapter
The master/follower functionality is usually used to link several drives together, so that the
load can be evenly distributed between the drives. This is ideal in applications where the
motors are coupled to each other via gearing, chain, belt, etc. This chapter introduces the
parameter setting for master-follower control.
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General
The master controls up to 10 followers by sending broadcast messages over fiber optic link via
loop or star connection. The master can read feedback signals from up to 3 selected followers.
Master is typically speed controlled.
Follower is speed-controlled when the motor shafts of Master and the Follower drives are
coupled flexibly so that a slight speed difference is possible.
Drooping rate can be set to adjust
speed dynamically for load balancing of master and followers.
Follower is torque-controlled when the motor shafts of Master and the Follower drives are
coupled solidly to each other.
There are two kinds of Fault maybe occur during using M/F function. One is 7582 M/F comm
loss and the other is FF7E Follower Fault.
ATTENTION: The Master and Followers would be trip when these faults happen, but the
master would not trip when non-surveillant Followers encounter these faults.
7582 M/F comm loss shown with aux code on Master when Master communication loss
with Follower, and it is shown without aux code on Follower when Follower communication
loss with Master. This fault can be triggered when setting P60.9 M/F comm loss function to
be “Fault” on both Master and Follower.