ABB ACQ810 - Soft Pipefill

60 Program features
Settings
Parameter group 77 Pump sleep (page 254).
Diagnostics
Parameters 04.26 Wake up level (page 124), 06.02 Status word2 (page 127), 06.20
Pump status word (page 130) and 08.21 Pump alarm word (page 134).
 Soft pipefill
Filling up an empty system using normal PID control would cause a sudden pressure
peak. To avoid this, a soft pipefill function is available. This involves running the pump
at a lower speed until a predefined threshold of process actual value (for example,
measured pressure) is achieved. If a specified increase in the actual value is not
achieved within a specified time, pump speed is stepped up. This is repeated until the
Wake-up level
(77.10)
t < t
sd
Signal selected by 77.02
(for example, motor speed)
Selected process
actual value
STOP
t
sd
= Sleep delay (77.04)
Sleep level
(77.03)
START
Wake-up delay
(77.11)
t
sd
Setpoint
Time
Sleep boost step (77.06)
Control panel:
SLEEPING
Sleep boost time (77.08)
Control panel:
BOOSTING
Time
Time