ABB ACQ80, Firmware Manual

Page: 48 / 390

48 Program features
The pump cleaning sequence can have several positive direction speed steps in
one cleaning sequence.
When the negative speed is not allowed, the drive ignores phases 1…4.
Note: Cleaning in a negative direction requires negative minimum
speed/frequency in parameter
30.11 Minimum speed
/
30.13 Minimum frequency
.
Cleaning sequence steps
1. The pump system meets the triggering conditions as per the operating
mode (
83.12
) selected. At this condition, normal operation stops and the
drive uses the target time defined in parameter
83.26 Time to zero-speed
to
reach zero speed.
2. Cleaning speed is defined by parameter
83.20 Cleaning speed step
.
3. Initially, the pump runs in negative direction. The pump runs at cleaning
speed for the time defined by parameter
83.27 Cleaning on time
.
4. The pump decelerates to zero-speed. Time to zero speed 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
.
Normal operation
Time
1
2 3 4
5
6
7
8
9
10
Normal operation
2 3 4
5
6
7
8
9
83.20
Sequence Parameter Sequence Parameter
1
83.26 Time to zero-speed
6
83.25 Time to cleaning speed
2
83.25 Time to cleaning speed
7
83.27 Cleaning on time
3
83.27 Cleaning on time
8
83.26 Time to zero-speed
4
83.26 Time to zero-speed
9
83.28 Cleaning off time
5
83.28 Cleaning off time
10
83.25 Time to cleaning speed
83.20