Process Ctrl. Feedb.; Process Pid Ctrl.; Process Pid Normal/Inverse Control; Process Pid Anti Windup - Danfoss VLT AutomationDrive Programming Manual

Parameter Descriptions
7-12 Torque PI Proportional Gain
Range: Function:
100 % [0 - 500 %] Enter the proportional gain value for the
*
torque controller. Selection of a high value
makes the controller react faster. Too high
a setting leads to controller instability.
7-13 Torque PI Integration Time
Range: Function:
0.020 s [0.002 - 2.000 Enter the integration time for the
*
s] torque controller. Selecting a low value
causes the controller to react faster.
Too low a setting leads to control
instability.

3.9.3 7-2* Process Ctrl. Feedb.

Select the feedback sources for the process PID control,
and the way in which this feedback should be handled.
7-20 Process CL Feedback 1 Resource
Option:
[0] No function
*
[1] Analog input 53
[2] Analog input 54
[3] Frequency input 29
[4] Frequency input 33
[7] Analog input X30/11
[8] Analog input X30/12
[15] Analog Input X48/2
7-22 Process CL Feedback 2 Resource
Option:
[0] No function
*
[1] Analog input 53
[2] Analog input 54
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FC 300 Programming Guide
Function:
The effective feedback signal is made
up of the sum of up to two different
input signals.
Select which Adjustable frequency
drive input should be treated as the
source of the first of these signals.
The second input signal is defined in
7-22 Process CL Feedback 2 Resource.
Function:
The effective feedback signal is made
up of the sum of up to two different
input signals. Select which Adjustable
frequency drive input should be
treated as the source of the second
of these signals. The first input signal
is defined in 7-20 Process CL Feedback
1 Resource.
®
MG33MD22 - VLT is a registered Danfoss trademark
7-22 Process CL Feedback 2 Resource
Option: Function:
[3] Frequency input 29
[4] Frequency input 33
[7] Analog input X30/11
[8] Analog input X30/12
[15] Analog Input X48/2

3.9.4 7-3* Process PID Ctrl.

7-30 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 in order to increase the
*
output frequency.
[1] Inverse Sets process control in order to reduce the output
frequency.

7-31 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.
7-32 Process PID Start Speed
Range: Function:
0 RPM [0 - Enter the motor speed to be attained as a
*
6000 start signal for commencement of PID
RPM] control. When the power is switched on, the
Adjustable frequency drive will commence
ramping and then operate under speed
open-loop control. Thereafter, when the
process PID start speed is reached, the
Adjustable frequency drive will change over
to process PID control.
7-33 Process PID Proportional Gain
Range: Function:
0.01 [0.00 - 10.00 ] Enter the PID proportional gain. The
*
proportional gain multiplies the error
between the setpoint and the feedback
signal.
7-34 Process PID Integral Time
Range: Function:
10000.00 s [0.01 - Enter the PID integral time. The
*
10000.00 s] integrator provides an increasing
gain at a constant error between
3 3
3-81