Chapter 12 Description of Parameter SettingsC2000
12.2-00-4
The low-speed bandwidth cannot be set too high, or the observer will diverge.
7. 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.
(Speed response is too slow→ Increase the setting value)
Situation 2. The noise of the observer is too large, and causes the operation diverged.
(Speed noise is too large→Decrease)
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.
Check Pr. 11-01 whether the JM per-unit of system inertia is too large.
Decrease Pr. 10-25 FOC bandwidth for speed observer, or Pr. 11-05 zero-speed
bandwidth.
8. Related parameters
Speed Control Mode
Default: 0
Settings 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）
5: IMFOC Sensorless (IM FOC sensorless)
6: PM Sensorless (PM FOC sensorless)
7: IPM Sensorless (Interior PM FOC sensorless)
Output Frequency of Motor 1 (Base Frequency and Motor Rated Frequency)
Default: 60.00 / 50.00
Settings 0.00–599.00Hz
Set this value according to the motor’s rated frequency from the motor’s nameplate. If the
motor’s rated frequency is 60Hz, set the value to 60Hz. If the motor’s rated frequency is 50Hz,
set the value to 50Hz.
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