Danfoss VLT AutomationDrive FC 300 Programming Manual page 113

Parameter Descriptions
7-51 Process PID Feed Fwd Gain
Range: Function:
in 7-38 Process PID Feed Forward Factor is always
related to the reference whereas 7-51 Process PID
Feed Fwd Gain has more choices. In winder
applications, the feed fwd factor will typically be
the line speed of the system.
7-52 Process PID Feed Fwd Ramp up
Range: Function:
0.01 s [0.01 - 10 s] Controls the dynamics of the feed forward
*
signal when ramping up.
7-53 Process PID Feed Fwd Ramp down
Range: Function:
0.01 s [0.01 - 10 s] Controls the dynamics of the feed forward
*
signal when ramping down.
7-56 Process PID Ref. Filter Time
Range: Function:
0.001 s [0.001 - 1 s] Set a time constant for the reference first
*
order low-pass filter. The low-pass filter
improves steady-state performance and
dampens oscillations on the reference/
feedback signals. However severe filtering
can be detrimental to dynamic
performance.
7-57 Process PID Fb. Filter Time
Range: Function:
0.001 s [0.001 - 1 s] Set a time constant for the feedback first
*
order low-pass filter. The low-pass filter
improves steady-state performance and
dampens oscillations on the reference/
feedback signals. However severe filtering
can be detrimental to dynamic
performance.
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VLT AutomationDrive Programming Guide
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