Delta VFD300C43S-HS User Manual page 474

Chapter 12 Description of Parameter SettingsC2000-HS
7. Select auto-tuning gain (Pr.11-00 bit0=1), adjust ASR parameters according to the speed response.
Pr.11-00 bit0 =1, use auto-tuning for ASR
Pr.11-03 ASR1 low-speed bandwidth (When the acceleration of low-speed cannot follow the
acceleration command, increase the low-speed bandwidth)
Pr.11-04 ASR2 high-speed bandwidth (When the acceleration in high speed causes vibration or
cannot follow the acceleration command, increase high-speed bandwidth)
Pr.11-05 Zero-speed bandwidth (If the response of start-up is slow or incapable, increase
zero-speed bandwidth)
The bigger the setting value for ASR bandwidth, the faster the response.
The low-speed bandwidth cannot be set too high, or the observer will diverge.
8. Adjust the setting of FOC speed observer and per-unit value of inertia (common problems)

Pr.10-25: Set up FOC bandwidth of speed observer
Situation 1. Speed command changes rapidly, but speed response cannot follow.
Situation 2. The noise of the observer is too large, and causes the operation diverged.

Pr.11-01: Set up per unit of system inertia
Situation 1. The inrush current is too high at start-up, and causes an oc error.
Situation 2. An ocn error occurs during RUN or STOP, and the motor runs randomly.
a. Check Pr.11-01 whether the JM per-unit of system inertia is too large.
b. Decrease Pr.10-25 FOC bandwidth for speed observer or Pr.11-05 zero-speed
bandwidth.
9. Related parameters
Speed Control Mode
Settings
(Speed response is too slow→Increase the setting value)
(Speed noise is too large→Decrease)
0: IMVF (IM V/F control)
1: IMVFPG (IM V/F control+ Encoder)
2: IM/PM SVC(IM/PM space vector control)
3: IMFOCPG (IM FOC + Encoder)
4: PMFOCPG（PM FOC + Encoder）
12.2-00-4
Default: 0