Chapter 6 Control Modes of Operation
ASDA-A User Manual
4th Edition 2005/11/30, HE03
© DELTA ELECTRONICS, INC. ALL RIGHTS RESERVED
6-22
Manual Mode
When P2-32 is set to 0, users can define the proportional gain of speed loop (P2-04), integral gain (P2-06)
and feed forward gain (P2-07). Please refer to the following description:
Proportional gain: Adjust this gain can increase the response bandwidth of position loop.
Integral gain: Adjust this gain can enhance the low-frequency stiffness of speed loop and eliminate the
steady error. Also, reduce the value of phase margin. Over high integral gain will result in the unstable
servo system.
Feed forward gain: Adjust this gain, the phase delay time during operation is nearly zero when the
setting is close to 100%.
Relevant parameters:
P2 - 04
KVP
Proportional Speed Loop Gain
Communication Addr.: 0204H
Default: 500
Applicable Control Mode: P/S
Range: 2~100
Unit: msec
P2 - 06
KVI
Speed Integral Compensation
Communication Addr.: 0206H
Default: 100
Applicable Control Mode: P/S
Range: 0~4095
P2 - 07
KVF
Speed Feed Forward Gain
Communication Addr.: 0207H
Default: 0
Applicable Control Mode: S
Range: 0~20000
Unit: 0.0001
In theory, stepping response can be used to explain proportional gain (KVP), integral gain (KVI) and feed
forward gain (KVF). Now we use frequency area and time area respectively to explain the logic.