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Chapter 5 Trial Run and Tuning Procedure|ASDA-B Series
Revision February 2008, Doc. Name: 2006PDD23000009 5-21
NLP, Parameter P2-25 Low-pass Filter Time Constant (Resonance Suppression)
When the value of (J_load / J_motor) is high, the responsiveness of speed loop may decrease. At
this time, the users can increase the setting value of KVP (P2-04) to keep the responsiveness of
speed loop. However, when increasing the setting value of KVP (P2-04), it may easily result in the
vibration of machinery system. Please use this parameter to suppress or eliminate the noise of
resonance. If the setting value of NLP is higher, the capability of improving the noise of resonance
is better. However, if the setting value is over high, it may easily lead to the instability of speed
loop and overshoot of machinery system.
The recommended setting value is as follows:
1000
NLP (Parameter P2-25)
4 x Speed Loop Responsiveness (Hz)
DST, Parameter P2-26 External Anti-Interference Gain
This parameter is used to enhance the anti-interference capability and reduce the occurrence of
overshoot. The default setting is 0 (Disabled). It is not recommended to use it in manual mode
only when performing a few tuning in AutoMode (Please refer to P2-32).
PFG, Parameter P2-02 Position Feed Forward Gain
This parameter is used to reduce position error and shorten the positioning settling time. However,
if the setting value is over high, it may easily lead to the overshoot of machinery system. If the
value of electronic gear ratio (1-44 /1-45) is over than 10, the machinery system may also easily
generate vibration or noise.