GE Industrial Solutions 6KCV300WPD - Manual (Page 175)

Ant
Feedback
Reset PID
IntGain
Description
It performs a PID controller with anti wind-up function. User has to specify the Reference [x] of the con-
trolled variable, the Feedback [x] from the controlled variable, the proportional gain
output
limit [y] and the Reset input to set the output and the integral part to 0.
Here [x] is the measure unit of the controlled variable and [y] is the measure unit of the control variable (input
to the controlled system).
The PID has also an integral and derivative part.
The integral part consists of enable input integral gain (IntGain) and integral part limit
The derivative part consists of enable input derivative gain [y/x filter time
constant of a low pass filter and derivative part limit For more details see
Time Derivative compound.
L e t
e = reference feedback [x]
The compound block performs the following formula:
Out =
l
e + IntGain + Time-Derivative(e) [y]
At the end the output Out is limited at OutLim value, and if the limit is reached the Time-Lim-Int is
disabled avoiding the wind-up condition of the integrator.
Input variables
None
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