ABB ACS560 Firmware Manual page 127

PFC enabled pump control timing diagram
Expected
(Demand - represented by the process
Flow Rate/
PID reference)
Pressure
Speed
(pump 1 with
drive)
Speed
(auxiliary
pump)
(1) 76.30 Start point 1
(2) 76.55 Start delay
started only when speed of pump 1 is higher or equal to the start speed
(76.30) for the duration mentioned in this parameter.
(3) 76.57 PFC speed hold on
momentum. This time is used to compensate the time needed to accelerate
the auxiliary pump to a speed where it produces the flow.
(4) 76.41 Stop point 1
(5) 76.56 Stop delay
pump 1 is lower or equal to stop speed (76.41) for the duration mentioned in
this parameter.
(6) 76.58 PFC speed hold off
acceleration to the speed that produces flow.
(1)
(2)
(3)
RO3
On
- Start speed for the auxiliary motor.
- Delay time to start the auxiliary pump. The pump is
- Duration for pump 1 to maintain the speed
- Stop speed for the auxiliary motor.
- Delay time to turn off the auxiliary pump when speed of
- Time needed to compensate the pump 1
Control macros 127
(4)
(6)
(5)
RO3
Off
Time
Time
Time
Relay output