Danfoss VLT Midi Drive FC 280 Programming Manual page 69

Parameter Descriptions
7-06 Speed PID Lowpass Filter Time
Range: Function:
Feedback
Disturbed feedback signal
Feedback
Filtered feedback signal
Illustration 4.15 Feedback Signal
7-07 Speed PID Feedback Gear Ratio
Range: Function:
1 [0.0001 -
*
32 ]
Illustration 4.16 Speed PID Feedback Gear
Ratio
The frequency converter multiplies the speed
feedback by this ratio.
7-08 Speed PID Feed Forward Factor
Range: Function:
0 % [0 - 500 %] The reference signal bypasses the speed
*
controller by the amount specified. This
feature increases the dynamic performance
of the speed control loop.
7-12 Torque PID 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.
MG07C302
Programming Guide
0.6 t (Sec.)
Lowpass lter
f = 10 Hz
g
0.6 t (Sec.)
n1 n2
Motor
Par 7-07=1.00 Par 7-07=n1/n2
Danfoss A/S © 07/2016 All rights reserved.
7-13 Torque PID Integration Time
Range: Function:
0.020 s [0.002 - 2 s] Enter the integration time for the torque
*
controller. The lower the integration time,
the faster the controller reacts. However,
too low a setting leads to controller
instability.
7-20 Process CL Feedback 1 Resource
Option: Function:
The effective feedback signal is made up
of the sum of up to 2 different input
signals. Select which input is treated as
the source of the first of these signals.
nd
The 2
parameter 7-22 Process CL Feedback 2
Resource.
[0] No function
*
[1] Analog Input 53
[2] Analog Input 54
[3] Frequency input
29
[4] Frequency input
33
7-22 Process CL Feedback 2 Resource
Option: Function:
The effective feedback signal is made up
of the sum of up to 2 different input
signals. Select which input is treated as
the source of the 2
st
The 1 input signal is defined in
parameter 7-20 Process CL Feedback 1
Resource.
[0] No function
*
[1] Analog Input 53
[2] Analog Input 54
[3] Frequency input
29
[4] Frequency input
33
7-30 Process PID Normal/ Inverse Control
Option: Function:
Normal and inverse controls are implemented by
introducing a difference between the reference
signal and the feedback signal.
[0] Normal Set process control to increase the output
*
frequency.
[1] Inverse Set process control to decrease the output
frequency.
input signal is defined in
nd of these signals.
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