ASDA-A2  Chapter 6  Control Mode of Operation 
Revision February, 2017  6-37 
used to adjust PI controller. The abilities of PI controller to deal with the resistance of torque load 
and the following command are the same. 
That is to say, the following command and resistance of torque load have the same performance in 
frequency domain and time domain. Users can reduce the bandwidth by setting the low-pass filter 
in command end. 
 
Auto Mode 
Auto mode adopts adaptive principle. The servo drive automatically adjusts the parameters 
according to the external load. Since the adaptive principle takes longer time, it will be unsuitable if 
the load changes too fast. It would be better to wait until the load inertia is steady or changes 
slowly. Depending on the speed of signal input, the adaptive time will be different from one another. 
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Motor Speed
Inertia Measurement
 
Inertia Estimation