Delta C2000 Series User Manual page 599

Chapter 12 Description of Parameter SettingsC2000
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.
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.
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
Settings
Output Frequency of Motor 1 (Base Frequency and Motor Rated Frequency)
Settings
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.
(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）
5: IMFOC Sensorless (IM FOC sensorless)
6: PM Sensorless (PM FOC sensorless)
7: IPM Sensorless (Interior PM FOC sensorless)
0.00–599.00Hz
12.2-00-4
Default: 0
Default: 60.00 / 50.00