Danfoss VLT Midi Drive FC-280P4K0 [97/136] Parameters 21 ext closed loop
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Danfoss VLT Midi Drive FC-280P4K0 [97/136] Parameters 21 ext closed loop

Danfoss VLT Midi Drive FC-280P18K [97/136] Parameters 21 ext closed loop
4.18 Parameters: 21-** Ext. Closed Loop
21-09 Extended PID Enable
Select the extended CL PID controller that is to be autotuned.
Option: Function:
[0] * Disabled
[1] Enabled Ext CL1 PID
21-11 Ext. 1 Minimum Reference
Range: Function:
0 ExtPID1Unit* [ -999999.999 -
999999.999
ExtPID1Unit]
This parameter sets the
minimum value that can be
obtained by the sum
setpoint and reference.
21-12 Ext. 1 Maximum Reference
Range: Function:
100
ExtPID1Unit
[ -999999.999 -
999999.999
ExtPID1Unit]
This parameter sets the
maximum value that can
be obtained by the sum of
the setpoint and reference.
21-13 Ext. 1 Reference Source
This parameter denes which input on the frequency converter
should be treated as the source of the reference signal.
Option: Function:
[0] * No function
[1] Analog Input 53
[2] Analog Input 54
[7] Frequency input 29
[8] Frequency input 33
21-14 Ext. 1 Feedback Source
This parameter denes which input on the frequency converter
should be treated as the source of the feedback signal.
Option: Function:
[0] * No function
[1] Analog Input 53
[2] Analog Input 54
[3] Frequency input 29
[4] Frequency input 33
21-15 Ext. 1 Setpoint
Range: Function:
0 ExtPID1Unit* [-999999.999 -
999999.999
ExtPID1Unit]
This parameter is used as the
reference for comparing
feedback values. The setpoint
can be oset with digital,
analog, or bus references.
21-17 Ext. 1 Reference [Unit]
Range: Function:
0 ExtPID1Unit* [-999999.999 -
999999.999 ExtPID1Unit]
Returns the resulting
reference value.
21-18 Ext. 1 Feedback [Unit]
Range: Function:
0 ExtPID1Unit* [-999999.999 -
999999.999 ExtPID1Unit]
Returns the feedback
value.
21-19 Ext. 1 Output [%]
Range: Function:
0 %* [0 - 100 %] Returns the extended closed loop 1 PID
controller output value.
21-20 Ext. 1 Normal/Inverse Control
Select [0] Normal if the controller output should be reduced
when the feedback is higher than the reference. Select [1] Inverse
if the output should be increased when the feedback is higher
than the reference.
Option: Function:
[0] * Normal
[1] Inverse
21-21 Ext. 1 Proportional Gain
Range: Function:
0.01* [0 - 10 ] The proportional gain indicates the number of
times the error between the setpoint and the
feedback signal is to be applied.
21-22 Ext. 1 Integral Time
Range: Function:
10000 s* [0.01 -
10000 s]
The integrator provides an increasing
gain at a constant error between the
setpoint and the feedback signal. The
integral time is the time needed by the
integrator to reach the same gain as the
proportional gain.
21-23 Ext. 1 Dierentation Time
Range: Function:
0 s* [0 - 10 s] The dierentiator does not react to a constant
error. It only provides a gain when the error
changes. The quicker the error changes, the
stronger the gain from the dierentiator.
21-24 Ext. 1 Dif. Gain Limit
Range: Function:
5* [1 - 50 ] Set a limit for the dierentiator gain (DG). The DG
increases if there are fast changes. Limit the DG to
obtain a pure dierentiator gain at slow changes
and a constant dierentiator gain where quick
changes occur.
Parameter Descriptions Programming Guide
MG07C202 Danfoss A/S © 03/2016 All rights reserved. 95
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