ABB ACS560 Firmware Manual page 347

No. Name/Value
PFC
SPFC
76.25 Number of motors
1...4
76.26 Min number of
motors allowed
0...4
76.27 Max number of
motors allowed
1...4
76.30 Start point 1
0...32767 rpm/Hz
76.31 Start point 2
76.32 Start point 3
76.41 Stop point 1
0...32767 rpm/Hz
Description
PFC enabled. One pump at a time is controlled by the drive.
The remaining pumps are direct-on-line pumps that are
started and stopped by the drive logic
The frequency (group 28 Frequency reference
(group 22 Speed reference
defined as PID for the PFC functionality to work properly.
SPFC enabled. For more information, see
Control (PFC) macro on
SPFC enabled. For more information, see
Control (SPFC) macro on
Total number of motors used in the application, including the
motor connected directly to the drive.
Number of motors.
Minimum number of motors running simultaneously.
Minimum number of motors.
Maximum number of motors running simultaneously.
Maximum number of motors.
Defines the start speed (Hz/rpm) for the first auxiliary pump.
As the motor speed or frequency exceeds the limit defined by
this parameter, a new auxiliary pump is started.
To avoid nuisance starts of the auxiliary pump, the speed of
the variable speed pump should be higher than the start
speed for the duration defined by parameter
delay. If the speed decreases below the start speed, the
auxiliary pump is not started.
To maintain the process conditions during the start of the
auxiliary pump, a speed hold on time can be defined with
parameter 76.57 PFC speed hold
not produce significant flow with low frequencies. The speed
hold on time can be used to compensate the time needed to
accelerate the auxiliary pump to a speed where it produces
flow.
Speed/frequency.
Defines the start speed (Hz/rpm) for the second auxiliary
motor. See parameter 76.31 Start point
Defines the start speed (Hz/rpm) for the third auxiliary motor.
See parameter 76.31 Start point
Defines the stop speed (Hz/rpm) for the first auxiliary motor.
When the speed of the motor connected directly to the drive
falls below this value and one auxiliary motor is running, the
stop delay defined by parameter
If the speed is still at the same level or lower when the stop
delay elapses, the first auxiliary motor stops.
The running speed of the drive is increased by
Stop point 1] after the auxiliary motor stops
Speed/frequency
chain) / speed
selection) reference must be
Pump and Fan
page.125
Soft Pump and Fan
page.134
76.55 Start
on. Certain pump types do
1.
1.
76.56 Stop delay
[Start point 1
Parameters 347
Def/FbEq16
2
3
1
1 = 1
1
1 = 1
1
1 = 1
Vector:
1300 rpm;
Scalar 48 Hz;
58 Hz
(95.20 b0)
1 = 1 unit
Vector:
1300 rpm;
Scalar 48 Hz;
58 Hz
(95.20 b0)
Vector:
1300 rpm;
Scalar 48 Hz;
58 Hz
(95.20 b0)
Vector:
800 rpm;
Scalar 25 Hz;
is started. 30 Hz
(95.20 b0)
-
1 = 1 unit