Danfoss VLT AutomationDrive FC 302 Programming Manual page 114

Parameter Descriptions
3.9.5 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.
3 3
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 reverts to [0]
No. Resetting the I-part makes it possible to start from
a well-defined point after changing something in the
process, e.g. changing a textile roll.
7-41 Process PID Output Neg. Clamp
Range:
-100 % [ -100 - par. 7-42 %] Enter a negative limit for the
*
7-42 Process PID Output Pos. Clamp
Range:
100 % [ par. 7-41 - 100 %] Enter a positive limit for the
*
7-43 Process PID Gain Scale at Min. Ref.
Range:
100 % [0 -
*
100 %]
7-44 Process PID Gain Scale at Max. Ref.
Range:
100 % [0 -
*
100 %]
7-45 Process PID Feed Fwd Resource
Option:
[0] No function
*
[1] Analog Input 53
112
VLT
Function:
process PID controller output.
Function:
process PID controller output.
Function:
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 min. ref.
(parameter 7-43 Process PID Gain Scale at Min.
Ref.) and the scale at max. ref.
(parameter 7-44 Process PID Gain Scale at Max.
Ref.).
Function:
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 min. ref.
(parameter 7-43 Process PID Gain Scale at Min.
Ref.) and the scale at max. ref.
(parameter 7-44 Process PID Gain Scale at Max.
Ref.).
Function:
Select which frequency converter input
should be used as the feed forward
factor. The FF factor is added directly to
the output of the PID controller. This
increases dynamic performance.
®
AutomationDrive FC 301/302 Programming Guide
7-45 Process PID Feed Fwd Resource
Option:
[2] Analog Input 54
[7] Frequency input
29
[8] Frequency input
33
[11] Local bus
reference
[20] Digital pot.meter
[21] Analog input
X30-11
[22] Analog input
X30-12
[29] Analog Input
X48/2
[32] Bus PCD
[36] MCO
7-46 Process PID Feed Fwd Normal/ Inv. Ctrl.
Option:
[0] Normal Select [0] Normal to set the feed forward factor to
*
[1] Inverse Select [1] Inverse to treat the FF resource as a
7-48 PCD Feed Forward
Range:
0 [0 - 65535 ] Read-out parameter where the bus
*
7-49 Process PID Output Normal/ Inv. Ctrl.
Option:
[0] Normal Select [0] Normal to use the resulting output from
*
[1] Inverse Select [1] Inverse to invert the resulting output
3.9.6 7-5* Ext. 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.
MG33MI02 - Rev. 2013-11-20
Function:
Selects a bus 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:
treat the FF resource as a positive value.
negative value.
Function:
parameter 7-45 Process PID Feed Fwd Resource
[32]) can be read.
Function:
the process PID controller as is.
from the process PID controller. This operation is
performed after the feed forward factor is applied.