Danfoss VLT AutomationDrive FC 300 Programming Manual page 112

Parameter Descriptions
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 will automatically revert to [0]
3 3
No. Resetting the I-part makes it possible to start from a
welldefined 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
[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
110
®
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
will be adjusted linearly between the scale
at min. ref. (7-43 Process PID Gain Scale at
Min. Ref.) and the scale at max. ref.
(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
will be adjusted linearly between the scale
at min. ref. (7-43 Process PID Gain Scale at
Min. Ref.) and the scale at max. ref.
(7-44 Process PID Gain Scale at Max. Ref.).
Function:
Select which drive 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.
MG33MG02 - VLT
AutomationDrive Programming Guide
7-45 Process PID Feed Fwd Resource
Option:
[29] Analog Input X48/2
[32] Bus PCD
7-46 Process PID Feed Fwd Normal/ Inv. Ctrl.
Option:
[0] Normal Select [0] Normal to set the feed forward factor to
treat the FF resource as a positive value.
[1] Inverse Select [1] Inverse to treat the FF resource as a
negative value.
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
the process PID controller as is.
[1] Inverse Select [1] Inverse to invert the resulting output from
the process PID controller. This operation is
performed after the feed forward factor is applied.
3.9.6 7-5* Ext. Process PID Ctrl.
This parameter group is only used if 1-00 Configuration
Mode is set to [7] Extended PID speed CL or [8] Extended PID
Speed OL.
7-50 Process PID Extended PID
Option:
[0] Disabled Disables the extended parts of the process PID
[1] Enabled Enables the extended parts of the PID controller.
7-51 Process PID Feed Fwd Gain
Range:
1 [0 -
*
100 ]
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is a registered Danfoss trademark
Function:
Selects a bus reference configured by
8-02 Control Word Source. Change
8-42 PCD Write Configuration for the
bus used in order to make the feed-
forward available in 7-48 PCD Feed
Forward. Use index 1 for feed-forward
[748] (and index 2 for reference
[1682]).
Function:
Function:
7-45 Process PID Feed Fwd Resource [32]) can
be read.
Function:
Function:
controller.
Function:
The feed forward is used to obtain the desired
level, based on a well-known signal available. The
PID controller then only takes care of the smaler
part of the control, necessary because of
unknown characters. The standard feed fwd factor