Delta ASD-A2 Series User Manual page 154

ASDA-A2
 Low-pass filter of resonance suppression (NLP, parameter P2-25)
The high value of inertia ratio will reduce the frequency response of speed loop. Therefore, the
KVP value must be increased to maintain the response frequency. During the process of
increasing KVP value, it might cause machinary resonance. Please use this parameter to
elimiate the noise of resonance. The bigger the value is, the better the capability of improving
high-frequency noise will be. However, if the value is set too big, it would cause the unstability
of speed loop and overshoot. It is suggested to set the value as the following:
NLP P2 25
 Anti-interference gain (DST, parameter P2-26)
This parameter is used to strengthen the ability of resisting external force and gradually
eliminate overshoot during acceleration / deceleration. Its default value is 0. It is suggested not
to adjust the value in manual mode, unless it is for fine-tuning.
 Position feed forward gain (PFG, parameter P2-02)
It can reduce the position error and shorten the settling time. However, if the value is set too
big, it might cause overshoot. If the setting of e-gear ratio is bigger than 10, it might cause the
noise as well.
Revision February, 2017
Chapter 5 Trial operation and Tuning
5-21