GE AF-650 GP Programming Manual page 157

Parameter Descriptions
PI-46 Process PID Feed Fwd Normal/ Inv. Ctrl.
Option:
[1] Inverse Select [1] Inverse to treat the feed forward resource
3 3
PI-48 PCD Feed Forward
Range:
0 [0 - 65535] This parameter contains the value of
*
PI-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
3.22.5 PI-5# Ext. Process PID Ctrl.
This parameter group is only used if parameter H-40 Config-
uration Mode is set to [7] Extended PID speed CL or [8]
Extended PID Speed OL.
PI-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.
*
PI-51 Process PID Feed Fwd Gain
Range: Function:
1 [0 - The feed forward is used to obtain the required
*
100] level, based on a well-known signal available. The
PID controller then only takes care of the smaller
part of the control, necessary because of unknown
characters. The standard feed forward factor in
parameter PI-38 Process PID Feed Forward Factor is
always related to the reference, whereas
parameter PI-51 Process PID Feed Fwd Gain has more
options. In winder applications, the feed forward
factor is typically the line speed of the system.
PI-52 Process PID Feed Fwd Ramp up
Range:
0.01 s [0.01 - 10 s] Controls the dynamics of the feed-forward
*
PI-53 Process PID Feed Fwd Ramp down
Range:
0.01 s [0.01 - 10 s] Controls the dynamics of the feed-forward
*
156
Function:
as a negative value.
Function:
parameter PI-45 Process PID Feed Fwd Resource
[32] Bus PCD.
Function:
the process PID controller as is.
from the process PID controller. This operation is
performed after the feed forward factor is applied.
Function:
controller.
Function:
signal when ramping up.
Function:
signal when ramping down.
PI-56 Process PID Ref. Filter Time
Range:
0.001 s [0.001 - 1
*
s]
PI-57 Process PID Fb. Filter Time
Range:
0.001 s [0.001 - 1
*
s]
PI-60 Process PID Error
Range:
0 % [-200 - 200 %] Gives the present error value used by the
*
PI-61 Process PID Output
Range:
0 % [-200 - 200 %] Gives the present raw output value from
*
PI-62 Process PID Clamped Output
Range:
0 % [-200 - 200 %] Gives the present output value from the
*
PI-63 Process PID Gain Scaled Output
Range:
0 % [-200 -
*
200 %]
02/2016 All rights reserved.
Function:
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.
Function:
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.
Function:
process PID controller.
Function:
the process PID controller.
Function:
process PID controller after the clamp
limits have been observed.
Function:
Gives the present output value from the
process PID controller after the clamp
limits have been observed and the
resulting value has been gain scaled.
DET-618D