GE AF-650 GP Programming Manual page 138

Parameter Descriptions
PI-38 Process PID Feed Forward Factor
Range: Function:
PI-38 Process PID Feed Forward Factor is active
when H-40 Configuration Mode is set to [3]
Process.
PI-39 On Reference Bandwidth
Range: Function:
5 % [0 - 200 Enter the On Reference bandwidth. When the
*
%] PID Control Error (the difference between the
reference and the feedback) is less than the
set value of this parameter the On Reference
status bit is high, i.e. =1.
PI-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]
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.
PI-41 Process PID Output Neg. Clamp
Range:
-100 % [-100 - par. PI-42 %] Enter a negative limit for the
*
PI-42 Process PID Output Pos. Clamp
Range:
100 % [par. PI-41 - 100 %] Enter a positive limit for the
*
process PID controller output.
PI-43 Process PID Gain Scale at Min. Ref.
Range: Function:
100 % [0 - 100 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. (PI-43 Process PID Gain Scale at
Min. Ref.) and the scale at max. ref.
(PI-44 Process PID Gain Scale at Max. Ref.).
PI-44 Process PID Gain Scale at Max. Ref.
Range: Function:
100 % [0 - 100 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. (PI-43 Process PID Gain Scale at
Min. Ref.) and the scale at max. ref.
(PI-44 Process PID Gain Scale at Max. Ref.).
AF-650 GP Programming Guide
Function:
process PID controller output.
Function:
DET-618C
PI-45 Process PID Feed Fwd Resource
Option: Function:
[0] No 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.
[1] Analog Input 53
[2] Analog Input 54
[7] Frequency input 29
[8] Frequency input 33
[11] Local bus reference
[20] Digital Potenti-
ometer
[21] Analog input X30-11
[22] Analog input X30-12
[32] Bus PCD Selects a bus reference configured by
O-02 Control Word Source. Change
O-42 PCD Write Configuration for the
bus used in order to make the feed-
forward available in B-48 PCD Feed
Forward. Use index 1 for feed-
forward [748] (and index 2 for
reference [1682]).
PI-46 Process PID Feed Fwd Normal/ Inv. Ctrl.
Option: Function:
[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.
PI-49 Process PID Output Normal/ Inv. Ctrl.
Option: Function:
[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.
3.21.5 PI-5# Ext. Process PID Ctrl.
This parameter group is only used if H-40 Configuration
Mode is set to [7] Extended PID speed CL or [8] Extended PID
Speed OL.
PI-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.
*
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