Delta Electronics ASDA-A2 Series User Manual page 142

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When the value of P1-37 (no matter it is the measured load inertia value or the set
load inertia value) is equal to the actual load inertia value, the actual speed loop
frequency response will be:
K VP
=
KVI, Parameter P2-06 Speed Integral Compensation

If the setting value of KVI is higher, the capability of decreasing the speed control
deviation is better. However, if the setting value is over high, it may easily result in
the vibration of machinery system. The recommended setting value is as follows:
NLP, Parameter P2-25 Low-pass Filter Time Constant of Resonance Suppression

When the value of (J_load / J_motor) is high, the frequency response of speed loop
may decrease. At this time, the users can increase the setting value of KVP (P2-04) to
keep the frequency response 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:
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 on the value gotten
through P2-32 Auto Mode.
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.
Revision January 2011
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Chapter 5 Trial Run and Tuning Procedure
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