Danfoss VLT AutomationDrive FC 361 Programming Guide

7-35 Process PID Dierentiation Time
Range: Function:
0 s* [0 - 10 s] Enter the PID dierentiation time.
The dierentiator does not react to
a constant error, but provides a
gain only when the error changes.
The shorter the PID dierentiation
time, the stronger the gain from
the dierentiator.
7-36 Process PID Di. Gain Limit
Range: Function:
5* [1 - 50] Enter a limit for the dierentiator
gain. If there is no limit, the dier-
entiator gain increases when there
are fast changes. To obtain a pure
dierentiator gain at slow changes
and a constant dierentiator gain
where fast changes occur, limit the
dierentiator gain.
7-38 Process PID Feed Forward Factor
Range: Function:
0 %* [0 - 200 %] Enter the PID feed forward factor.
The factor sends a constant fraction
of the reference signal to bypass
the PID control, so the PID control
only aects the remaining fraction
of the control signal. Any change to
this parameter aects the motor
speed. When the feed forward
factor is activated, it provides less
overshoot and high dynamics when
changing the setpoint.
Parameter 7-38 Process PID Feed
Forward Factor is active when
parameter 1-00 Conguration Mode
is set to [3] Process.
7-39 On Reference Bandwidth
Range: Function:
5 %* [0 - 200 %] Enter the on-reference bandwidth.
When the PID control error (the
dierence between the reference
and the feedback) is less than the
value of this parameter, the on-
reference status bit is 1.
4.8.4 7-4* Advanced Process PID Ctrl.
This parameter group is only used if parameter 1-00 Cong-
uration Mode is set to [7] Extended PID speed CL.
7-40 Process PID I-part Reset
Option: Function:
[0] * No
[1] Yes Select [1] Yes to reset the I-part of
the process PID controller. The
selection automatically returns to
[0] No. Resetting the I-part makes it
possible to start from a well-
dened point after changing
something in the process, for
example changing a textile roll.
7-41 Process PID Output Neg. Clamp
Range: Function:
-100 %* [ -100 - par.
7-42 %]
Enter a negative limit for the
process PID controller output.
7-42 Process PID Output Pos. Clamp
Range: Function:
100 %* [ par. 7-41 -
100 %]
Enter a positive limit for the process
PID controller output.
7-43 Process PID Gain Scale at Min. Ref.
Range: Function:
100 %* [0 - 100 %] Enter a scaling percentage to apply
to the process PID output when
operating at the minimum
reference. The scaling percentage is
adjusted linearly between the scale
at minimum reference
(parameter 7-43 Process PID Gain
Scale at Min. Ref.) and the scale at
maximum reference
(parameter 7-44 Process PID Gain
Scale at Max. Ref.).
7-44 Process PID Gain Scale at Max. Ref.
Range: Function:
100 %* [0 - 100 %] Enter a scaling percentage to apply
to the process PID output when
operating at the maximum
reference. The scaling percentage is
adjusted linearly between the scale
at minimum reference
(parameter 7-43 Process PID Gain
Scale at Min. Ref.) and the scale at
maximum reference
(parameter 7-44 Process PID Gain
Scale at Max. Ref.).
Parameter Descriptions Programming Guide
MG06J202 Danfoss A/S © 03/2019 All rights reserved. 91
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Danfoss VLT AutomationDrive FC 361 Specifications

General

Brand	Danfoss
Model	VLT AutomationDrive FC 361
Category	DC Drives
Language	English