While in V/f Control, do not use C3-01 [Slip Compensation Gain].

When you set the drive to CL-V/f Control, use the default settings for C5-01 to C5-05 [ASR Parameters]. If you make significant changes to the default settings, it can cause oscillation.

Table 1. Adjustment of Drive Control (V/f Control and Closed Loop V/f Control Methods)

Adjustment description

Parameter Number

Possible Solutions

Default

Recommended Setting

  • Prevent hunting and oscillation at middle speed range (10 Hz to 40 Hz)

n1-02 [Hunting Prevention Gain Setting]

  • If the torque is not sufficient with heavy loads, decrease the setting.

  • If there is hunting or oscillation with light loads, increase the setting.

1.00

0.50 - 2.00

  • Prevent hunting or oscillation at high speed range (120 Hz or more)

C4-25 [High-Speed Voltage Compensation]

Adjust the setting value.

1 [Enabled]

0 [Disabled]

  • Increasing motor excitation sound

  • Prevent hunting or oscillation at low speed range and middle speed range

C6-02 [Carrier Frequency Selection]

  • If there is a loud motor excitation sound, increase the setting value.

  • If there is hunting or oscillation at low speed range or middle speed range, decrease the setting value.

1

1 - F

  • Increase torque at low speed range (10 Hz or lower)

  • Prevent hunting and oscillation

C4-01 [Torque Compensation Gain]

  • If the torque is not sufficient at low speed range, increase the setting value.

  • If there is hunting or oscillation with light loads, decrease the setting value.

1.00

0.50 - 1.50

  • Increase torque at low speed range

  • Prevent shock during start up

E1-08 [Mid Point A Voltage]

  • If the torque is not sufficient at low speed range, increase the setting value.

  • If there is a large shock during start up, decrease the setting value.

15.0 V 2 3

13.0 V to 16.0 V 3

E1-10 [Minimum Output Voltage]

9.0 V 2 3

7.0 V to 10.0 V 3
 
1

The default setting changes when the settings for C6-01 [Normal / Heavy Duty Selection] and o2-04 [Drive Model (KVA) Selection] change.

2

The default setting changes when the settings for A1-02 [Control Method Selection] and E1-03 [V/f Pattern Selection] change.

3

This is the value for 200 V class drives. Multiply the voltage by 2 for 400 V class drives.