7-49 Process PID Output Normal/ Inv. Ctrl.
Option: Function:
[0] * Normal Select Normal [0] to use the resulting output from the process PID controller as is.
[1] Inverse Select Inverse [1] to invert the resulting output from the process PID controller. This operation is
performed after the feed forward factor is applied.
3.9.7 7-5* Process PID Ctrl.
7-50 Process PID Extended PID
Option: Function:
[0] Disabled Disables the extended parts of the process PID controller.
[1] * Enabled Enables the extended parts of the PID controller.
7-51 Process PID Feed Fwd Gain
Range: Function:
1.00* [0.00 - 100.00 ] 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 in par. 7-38 is always related to the reference whereas
7-51 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 - 10.00 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 - 10.00 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 - 1.000 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 - 1.000 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.
3 Parameter descriptions FC 300 Programming Guide
134
MG.33.M8.02 - VLT
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