Delta ASDA-A3 Series User Manual page 368

ASDA-A3 Operation Mode
System open-loop gain with resonance:
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If you increase the value of P2.025 from 0, the bandwidth (BW) becomes smaller (shown as
follows). Although it solves the problem of the resonance frequency, it also reduces the
response bandwidth and phase margin, making the system unstable.
If knowing the resonance frequency, you can suppress the resonance by using the Notch filter.
The frequency range of the notch filter is 50 - 5000 Hz and the suppression strength is
0 - 40 dB. If the frequency does not meet the Notch filter conditions, then using the low-pass
filter to reduce the resonance is suggested.
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