Danfoss VLT AQUA Drive FC 200 Programming Manual page 191

Parameter Description
Depending on the application and on the purpose of using
it, this feature can be used as preventative or reactive
measure and can be triggered/started in the following
different ways:
•
On each Start Command (29-11 Derag at Start/
Stop)
•
On each Stop Command (29-11 Derag at Start/
Stop)
•
On each Start/Stop Command (29-11 Derag at
Start/Stop)
•
On Digital Input (parameter group 5-1*)
•
On Drive Action with the Smart Logic Controller
(13-52 SL Controller Action)
•
As Timed Action (parameter group 23-**)
•
On High Power (parameter group 29-2*)
29-10 Derag Cycles
Range: Function:
Size related [0 - 10 ] The number of cycles the adjustable
*
frequency drive will derag.
29-11 Derag at Start/Stop
Option: Function:
Derag function when starting and stopping
the adjustable frequency drive.
[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 adjustable frequency drive
*
will remain at the derag speed.
29-13 Derag Speed [RPM]
Range:
Size related [ par. 4-11 - par.
*
4-13 RPM]
29-14 Derag Speed [Hz]
Range:
Size related [ par. 4-12 - par.
*
4-14 Hz]
®
VLT AQUA Drive Programming Guide
Function:
The speed at which the
adjustable frequency drive will
derag in RPM.
Function:
The speed at which the
adjustable frequency drive will
derag in Hertz.
®
MG20O622 - VLT is a registered Danfoss trademark
29-15 Derag Off Delay
Range: Function:
10 s [1 - 600 s] The time that the adjustable frequency drive
*
will remain off before starting another derag
pulse. Allows contents of the pump to settle.
3.24.4 29-2* Derag Power Tuning
The derag feature monitors drive power in a similar
fashion as no-flow. Based on two 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 Setup will also set 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
Figure 3.84 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
3-165
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