•
On each start command (
•
On each stop command (
•
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 (
•
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:
Function:
Size related
*
[ 0 - par. 4-13
RPM]
The speed at which the
frequency converter derags in
RPM.
29-14 Derag Speed [Hz]
Range:
Function:
Size related
*
[ 0.0 - par. 4-14
Hz]
The speed at which the
frequency converter derags in
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.
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
Low Speed
power
Par. 29-26,
Par. 29-27
Activate Derag
Low Speed
Par. 29-24, Par. 29-25
Speed [Hz/RPM]
High Speed
Par. 29-28, Par. 29-29
The calculated power
+ the power factor (readout)
Par. 29-20, Par. 29-21
Derag power factor
Par. 29-22
130BC370.10
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.
Parameter Description
Programming Guide
MG20OB02
Danfoss A/S © 05/2018 All rights reserved.
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