ABB ACQ810 - Page 243

Parameters 243
Multipump Multiple drives, each controlling a separate pump, are
connected together using the drive-to-drive link.
3
75.02 Nbr of pumps Total number of pumps used in the application, including the
pump connected directly to the drive.
0…8 Number of pumps. 1 = 1
75.03 Follower mode Selects the source of reference when the drive is a follower.
Const speed Follower drives are started and stopped by the control logic
in the master drive. The master receives its reference from
the PI controller.
When flow demand increases, new pumps are started.
If parameter 76.10 Master location is set to In start, the latest
drive to start becomes the master; at the same time, the
previously-started drive becomes a follower and starts to
follow the reference defined by parameter 75.04 Follower
ref.
If parameter 76.10 Master location is set to Stable, the drive
that was started first remains the master.
0
See also the diagrams at parameter 75.04 Follower ref.
No. Name/Value Description FbEq
Frequency
Flow demand
75.04 Follower
ref
Drive status
Master Follower
Drive 1
Stopped Master
Follower
Drive 2
Stopped Master
Drive 3
D
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1
D
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2
D
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3