Lite-On Technology Corp.
Industrial Automation
171
Data size
16bit
Data format
Dec
The speed response is increased when the gain of the speed control is increased. Vibration and
noise occurs easily if the gain is set to an excessive value.
PB-26
KVI
Integral compensation for the speed
control
Communication
address:
0134H
0135H
Initial value
50
Control mode
ALL
Unit
rad/s
Configuration range
0 ~ 1023
Data size
16bit
Data format
Dec
When the integral value of the speed control is increased, the position response is increased and
the error magnitude of the speed control is reduced. Vibration and noise occurs easily if the gain is
set to an excessive value.
PB-27
KVF
Feed-forward gain for the speed control
Communication
address:
0136H
0137H
Initial value
0
Control mode
ALL
Unit
%
Configuration range
0 ~ 100
Data size
16bit
Data format
Dec
For smooth change of the speed control command, the increase in gain improves the magnitude of
the following error for the speed. For unsmooth change of the speed control command, the
decrease in gain mitigates the vibration of the mechanism during operation.
For academic principles, the step response can be used to interpret the proportional gain (KVP),
integral gain (KVI) and feed-forward gain (KVF).
We explain the basic principles based on frequency and time domain.
Principle of frequency domain
1.
STEP 1: KVI =KVF=0. Make an adjustment so that KVP3>KVP2>KVP1. The higher the KVP
the wider the bandwidth and the lower the phase margin.
