Chapter 1 - Overview; General - ABB ACS 600 Supplement To Firmware Manual

General

Speed-Controlled Master
Follower Follows the Torque Reference
External Con-
trol Signals
n
Mains
3
Follower Fault Master/Fol-
2 2
Supervision lower Link
Mains
3
Figure 1-1 Master/Follower applications, schematic representation.
ACS 600 Master/Follower Application Macro
The Master/Follower Application macro is designed for applications in
which the system is run by several ACS 600 drives and the motor
shafts are coupled to each other via gearing, chain, belt etc. Thanks to
the Master/Follower macro the load can be evenly distributed between
the drives.
The external control signals are connected to the Master ACS 600 only.
The Master controls the Followers via a fibre optic serial
communication link.
The Master station is typically speed controlled and the other drives
follow its torque or speed reference. In general:
• Torque control of the Follower should be used when the motor
shafts of the Master and Follower drives are coupled fixedly to each
other by gearing, a chain etc. No speed difference between the
drives is possible (see Figure 1-1).
• Speed control of the Follower should be used when the motor shafts
of the Master and the Follower drives are coupled flexibly to each
other. A slight speed difference between the drives is possible (see
Figure 1-1). When both the Master and Followers are speed-
controlled, drooping is also typically used (Parameter 60.06 DROOP
RATE).
In some applications both speed control and torque control of the
Followers are required. In those cases a flying change between speed
and torque control can be performed via a digital input of the Follower
(see Chapter 3 – Operation ).
of the Master
ACS 600
3
ACS 600
3
Chapter 1 – Overview
Speed-Controlled Master
Follower Follows the Speed Reference
of the Master
ACS 600
External Con-
trol Signals
n
Mains
3
Follower Fault Master/Fol-
2 2
Supervision lower Link
ACS 600
Mains
3
3
3
1-1