GE Industrial Solutions AF-650 GP General Purpose Drive Programming Guide - Manual (Page 137)

PI-20 Process CL Feedback 1 Resource
Option: Function:
of the first of these signals. The
second input signal is defined in
PI-22 Process CL Feedback 2 Resource.
[0] * No function
[1] Analog Input 53
[2] Analog Input 54
[3] Frequency input 29
[4] Frequency input 33
[7] Analog Input X30/11 (OPCGPIO)
[8] Analog Input X30/12 (OPCGPIO)
PI-22 Process CL Feedback 2 Resource
Option: Function:
The effective feedback signal is made
up of the sum of up to two different
input signals. Select which frequency
converter input should be treated as
the source of the second of these
signals. The first input signal is
defined in PI-20 Process CL Feedback 1
Resource.
[0] * No function
[1] Analog Input 53
[2] Analog Input 54
[3] Frequency input 29
[4] Frequency input 33
[7] Analog Input X30/11 (OPCGPIO)
[8] Analog Input X30/12 (OPCGPIO)
3.21.4 PI-3# Process PID Control
Parameters to configure the Process PID Controls.
PI-30 Process PID Normal/ Inverse Control
Option: Function:
Normal and inverse control are implemented by
introducing a difference between the reference
signal and the feedback signal.
[0] * Normal Sets process control to increase the output
frequency.
[1] Inverse Sets process control to reduce the output
frequency.
PI-31 Process PID Anti Windup
Option: Function:
[0] Off Continues regulation of an error even when the
output frequency cannot be increased or decreased.
[1] * On Ceases regulation of an error when the output
frequency can no longer be adjusted.
PI-32 Process PID Start Speed
Range: Function:
0 RPM * [0 -
6000
RPM]
Enter the motor speed to be attained as a
start signal for commencement of PID
control. When the power is switched on, the
frequency converter will commence ramping
and then operate under speed open loop
control. Thereafter, when the Process PID
start speed is reached, the frequency
converter will change over to Process PID
control.
PI-33 Process PID Proportional Gain
Range: Function:
0.01 * [0 - 10] Enter the PID proportional gain. The proportional
gain multiplies the error between the set point
and the feedback signal.
PI-34 Process PID Integral Time
Range: Function:
10000 s * [0.01 -
10000 s]
Enter the PID integral time. The
integrator provides an increasing gain at
a constant error between the set point
and the feedback signal. The integral
time is the time needed by the
integrator to reach the same gain as the
proportional gain.
PI-35 Process PID Differentiation Time
Range: Function:
0 s * [0 - 10 s] Enter the PID differentiation time. The differen-
tiator does not react to a constant error, but
provides a gain only when the error changes.
The shorter the PID differentiation time, the
stronger the gain from the differentiator.
PI-36 Process PID Diff. Gain Limit
Range: Function:
5 * [1 - 50] Enter a limit for the differentiator gain (DG). If there
is no limit, the DG will increase when there are fast
changes. Limit the DG to obtain a pure differen-
tiator gain at slow changes and a constant
differentiator gain where fast changes occur.
PI-38 Process PID Feed Forward Factor
Range: Function:
0 % * [0 -
200 %]
Enter the PID feed forward (FF) factor. The FF
factor sends a constant fraction of the reference
signal to bypass the PID control, so the PID
control only affects the remaining fraction of the
control signal. Any change to this parameter will
thus affect the motor speed. When the FF factor
is activated it provides less overshoot, and high
dynamics when changing the set point.
Parameter Descriptions AF-650 GP Programming Guide
136 DET-618C
3 3