User manual

Chapter 5 Trial Run and Tuning Procedure ASDA-A User Manual

5-26

 NLP, Parameter P2-25 Low-pass Filter Time Constant of Resonance Suppression

When the value of (J_load / J_motor) is high, the responsiveness of speed loop may decrease. At

this time, the user 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 on the value gotten through P2-32 AutoMode (PDFF) (setting value is

5, mode 5) automatically (The setting value of P2-26 will change to the value that measured in mode

5 (AutoMode (PDFF)) when switching mode 5 ((AutoMode (PDFF)) to mode 0 (Manual 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.