Delta VFD300C43S-HS User Manual page 449

 This parameter is only valid under PM sensorless speed mode (Pr.00-11=6).
 Increase the setting for this parameter to enhance the loading performance at START.
 The low-speed area includes motor's 1/5 rated rotor speed and below; the high-speed area
includes the motor's 1/5 rated rotor speed and above.

Magnetic Linkage Estimator High-speed Gain
Settings 10–1000%
 This parameter is only valid under PM sensorless speed mode (Pr.00-11=6).
 Increase the setting for this parameter to enhance the loading performance at high-speed area,
and improve the response of magnetic linkage estimator.
 When a speed vibration occurs in the week magnet area, decrease the setting for this
parameter.

Phase Locked Loop (PLL) Kp
Settings 10–1000%
 Increase the setting for this parameter to enhance the loading performance at high-speed area,
and improve the response of magnetic linkage estimator.
 When a high-frequency fluctuation occurs to the speed output frequency, decrease the setting
for this parameter.

Phase Locked Loop (PLL) Ki
Settings 10–1000%
 Increase this parameter to enhance the speed response during acceleration and deceleration.
Chapter 12 Description of Parameter SettingsC2000-HS
12.1-10-12
Default: 100%
Default: 100%
Default: 100%