ABB ACQ80, Руководство по прошивке

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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