ABB ACQ580 - Page 59

Program features 55
1. The pump system meets the triggering conditions defined by parameter 83.10
Pump cleaning action. At this conditions, normal operation stops and the drive
uses the target time defined in parameter 83.26 Time to zero-speed to reach zero
speed.
2. Acceleration for cleaning is defined by parameter 83.25 Time to cleaning speed.
3. The pump runs at cleaning speed for the time defined by parameter 83.27
Cleaning on time.
4. The pump decelerates to zero-speed. Target time is defined by parameter 83.26
Time to zero-speed.
5. The pump is stopped until parameter 83.28 Cleaning off time is elapsed.
6. The pump accelerates the pump speed to positive direction. See parameter 83.25
Time to cleaning speed.
7. The pump runs at the positive cleaning speed. See parameter 83.27 Cleaning on
time.
8. The pump decreases the pump speed back to zero defined by parameter 83.26
Time to zero-speed.
9. The drive waits until the parameter 83.28 Cleaning off time is elapsed. A new
cleaning sequence starts or normal operation starts.
10. The pump starts following speed/frequency reference of the active control
location. During acceleration to speed/frequency, the drive follows pump cleaning
acceleration time 83.25 Time to cleaning speed.
The drive automatically determines the fastest ramp during the pump cleaning and
used to protect the pump. It is possible that the quick ramps are faster than the pump
cleaning ramps.
The cleaning sequence starts based on the selected triggering conditions. The
cleaning sequence follows the diagram on page 54. You can start the sequence in
these conditions:
• on every start and stop
• based on the monitoring pump condition (for example, supervision 1…3;
underload and overload curve, see group 37 User load curve on 210)
• based on time interval (for example, at every 10 hours)
• manually (for example, DI4 to DI6, defined by parameter 83.12 Manually force
cleaning)
• through fieldbus, using parameter 83.12 Manually force cleaning. Set the
parameter to a value of 1 (a 2 s pulse) from the fieldbus to start a cleaning cycle
from an overriding controller.