ABB ACQ810 Firmware Manual page 246

246 Parameters
No. Name/Value
75.04 Follower ref
Reference
Speed
Drive 1
Status (M = Master; F = Follower; S = Stopped)
Speed
Drive 2
Status (M = Master; F = Follower; S = Stopped)
Speed
Drive 3
Status (M = Master; F = Follower; S = Stopped)
0...32767 rpm
Description
Only visible when
Operation mode.
Defines the reference used when parameter
mode is set to Const
follower.
The following diagram illustrates the starting of the drives in
a typical multipump configuration as the reference (flow
demand) first increases, then decreases. Follower start and
stop delays (parameters
delay) are ignored in this presentation.
M F
F (S) M F
F (S) M
Reference setting. This should generally be set at the
optimal operating point of the pump.
Multipump is selected at parameter
speed, and the drive is running as a
75.19 Start delay
M
F (S)
FbEq
75.01
75.03 Follower
and 75.20 Stop
Time
75.05 Start speed 1
75.04 Follower ref
Time
M
75.06 Start speed 2
75.04 Follower ref
75.12 Stop speed 1
Time
F (S)
75.13 Stop speed 2
Time
1 = 1 rpm