Danfoss VLT AutomationDrive FC 300 Programming Manual page 134

FC 300 Programming Guide
3.9.6 7-4* Advanced Process PID Ctrl.
7-40 Process PID I-part Reset
Option:
[0] * No
[1] Yes
7-41 Process PID Output Neg. Clamp
Range:
-100 %* [Application dependant]
7-42 Process PID Output Pos. Clamp
Range:
100 %* [Application dependant]
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
7-46 Process PID Feed Fwd Normal/ Inv. Ctrl.
Option:
[0] * Normal
[1] Inverse
Function:
Select Yes [1] to reset the I-part of the process PID controller. The selection will automatically revert
to No [0]. 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.
Function:
Enter a negative limit for the process PID controller output.
Function:
Enter a positive limit for the 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.
Process PID Gain Scale at Min. Ref.
(par. 7-43
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.
Process PID Gain Scale at Min. Ref.
(par. 7-43
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.
Function:
Select Normal [0] to set the feed forward factor to treat the FF resource as a positive value.
Select Inverse [1] to treat the FF resource as a negative value.
®
MG.33.M8.02 - VLT is a registered Danfoss trademark
3 Parameter descriptions
) and the scale at max. ref. (par. 7-44
) and the scale at max. ref. (par. 7-44
3
Process PID
Process PID
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