Delta ASDA-A3 Series User Manual page 186

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. Although it
solves the problem of the resonance frequency, it also reduces the response bandwidth and
phase margin.
If you know the resonance frequency, the Notch filter can eliminate the resonance directly.
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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