Danfoss VLT AQUA Drive FC 202 Programming Manual page 239

Parameter Description
•
On each start command (parameter 29-11 Derag
at Start/Stop).
•
On each stop command (parameter 29-11 Derag
at Start/Stop).
•
On each start/stop command
(parameter 29-11 Derag at Start/Stop).
•
On digital input (parameter group 5-1* Digital
Inputs).
•
On frequency converter action with the smart
logic controller (parameter 13-52 SL Controller
Action).
•
As timed action (parameter group 23-** Time-
based Functions).
•
On high power (parameter group 29-2* Derag
Power Tuning).
29-10 Derag Cycles
Range: Function:
Size related [0 - 10 ] The number of cycles the frequency
*
converter derags.
29-11 Derag at Start/Stop
Option: Function:
Derag function when starting and stopping
the frequency converter.
[0] Off
*
[1] Start
[2] Stop
[3] Start and stop
29-12 Deragging Run Time
Range: Function:
0 s [0 - 3600 s] The time that the frequency converter dwells
*
at the derag speed.
29-13 Derag Speed [RPM]
Range:
Size related [ 0 - par. 4-13
*
RPM]
29-14 Derag Speed [Hz]
Range:
Size related [ 0.0 - par. 4-14
*
Hz]
29-15 Derag Off Delay
Range: Function:
10 s [1 - 600 s] The time that the frequency converter
*
remains off before starting another derag
pulse. Allows contents of the pump to settle.
MG20OB02
Programming Guide
Function:
The speed at which the
frequency converter derags in
RPM.
Function:
The speed at which the
frequency converter derags in
Hz.
Danfoss A/S © 05/2018 All rights reserved.
29-16 Derag Counter
Range: Function:
0 [0 - 2147483647 ] Shows the number of deragging events.
*
29-17 Reset Derag Counter
Option: Function:
[0] Do not reset
*
[1] Reset counter Select option [1] Reset counter to reset the
deragging counter.
3.25.3 29-2* Derag Power Tuning
The derag feature monitors frequency converter power in a
similar fashion as no-flow. Based on 2 user-defined points
and an offset value, the monitor calculates a derag power
curve. It uses the exact same calculations as no-flow with
the difference being that derag monitors for high power
and not low power.
Commissioning the no-flow user points via the no-flow
auto set-up also sets the points of the derag curve to the
same value.
Power [kW/HP]
High Speed
power
Par. 29-30,
Par. 29-31
Activate Derag
Low Speed
power
Par. 29-26,
Par. 29-27
Low Speed
Par. 29-24, Par. 29-25
Illustration 3.113 Derag Power Tuning
29-20 Derag Power[kW]
Range: Function:
0 kW [0 - 0 kW] Readout of calculated derag power at actual
*
speed.
The calculated power
+ the power factor (readout)
Par. 29-20, Par. 29-21
Derag power factor
Par. 29-22
Speed [Hz/RPM]
High Speed
Par. 29-28, Par. 29-29
237
3 3