Danfoss VLT AutomationDrive FC 301 Programming Manual page 182

Parameter Descriptions
7-38 Process PID Feed Forward Factor
Range:
3 3
7-39 On Reference Bandwidth
Range:
5 %
*
3.8.7 7-4* Advanced Process PID Ctrl.
This parameter group is only used if parameter 1-00 Config-
uration Mode is set to [7] Extended PID speed CL or [8]
Extended PID Speed OL.
7-40 Process PID I-part Reset
Option:
[0] No
*
[1] Yes
7-41 Process PID Output Neg. Clamp
Range:
-100 %
*
7-42 %]
7-42 Process PID Output Pos. Clamp
Range:
100 %
*
100 %]
7-43 Process PID Gain Scale at Min. Ref.
Range:
100 %
*
180
Function:
parameter 1-00 Configuration Mode
is set to [3] Process.
Function:
[0 - 200 %] Enter the on-reference bandwidth.
When the PID control error (the
difference between the reference
and the feedback) is less than the
value of this parameter, the on-
reference status bit is 1.
Function:
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-
defined point after changing
something in the process, for
example changing a textile roll.
Function:
[ -100 - par. Enter a negative limit for the
process PID controller output.
Function:
[ par. 7-41 - Enter a positive limit for the process
PID controller output.
Function:
[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.).
Danfoss A/S © 10/2019 All rights reserved.
®
VLT AutomationDrive FC 301/302
7-44 Process PID Gain Scale at Max. Ref.
Range:
100 %
*
7-45 Process PID Feed Fwd Resource
Option:
[0]
*
[1]
[2]
[7]
[8]
[11]
[20]
[21]
[22]
[29]
[32]
7-46 Process PID Feed Fwd Normal/ Inv. Ctrl.
Option:
[0]
*
Function:
[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.).
Function:
No function Select which frequency converter
input should be used as the feed-
forward factor. The factor is added
to the output of the PID controller.
This increases dynamic
performance.
Analog Input
53
Analog Input
54
Frequency
input 29
Frequency
input 33
Local bus
reference
Digital
pot.meter
Analog input
X30/11
Analog input
X30/12
Analog Input
X48/2
Bus PCD Selects a fieldbus reference
configured by
parameter 8-02 Control Word Source.
Change parameter 8-42 PCD Write
Configuration for the bus used to
make the feed forward available in
parameter 7-48 PCD Feed Forward.
Use index 1 for feed forward [748]
(and index 2 for reference [1682]).
Function:
Normal Select [0] Normal to set the feed-
forward factor to treat the FF
resource as a positive value.
M0013101