Table 1. Parameters for Fine Tuning the Drive (AOLV)

Issue

Parameter Number

Possible Solutions

Default

Recommended Setting

  • oS [Overspeed] occurs.

  • Hunting or oscillation.

T1-01 [Auto-Tuning Mode Selection]

  • Make sure that the output of the drive and the motor are connected correctly.

  • Do Rotational Auto-Tuning for a single motor.

-

0

Hunting or oscillation in the high speed range (120 Hz or more)

C4-25 [High-Speed Voltage Compensation]

Adjust the setting value.

1 [Enabled]

0 [Disabled]

The volume of the motor excitation sound is too high.

C6-02 [Carrier Frequency Selection]

If the volume of the motor excitation sound is too high, increase the carrier frequency.

1 (2 kHz) 1

1 to upper limit value

Speed precision is unsatisfactory

E2-02 [Motor Rated Slip]

  • Decouple the motor and machine and do Rotational Auto-Tuning.

  • If the motor speed is slow, increase the value of E2-02 in small increments (approximately 0.1% of the default setting value).

  • If the motor speed is fast, decrease the value of E2-02 in small increments (approximately 0.1% of the default setting value).

2

Set to a value that is ±5% of the current value.

  • Unsatisfactory motor torque and speed response

  • Hunting or oscillation

  • High speed

    C5-01 [ASR Proportional Gain 1]

  • Low speed

    C5-03 [ASR Proportional Gain 2 (P)] 3

  • If torque or speed response are slow, increase the setting value in increments of 5.00.

  • If hunting or oscillation occur, decrease the setting value.

  • C5-01 = 10.00

  • C5-03 = 20.00

10.00 - 50.00

  • High speed

    C5-02 [ASR Integral Time 1]

  • Low speed

    C5-04 [ASR Proportional Gain 2 (P)] 3

  • If torque or speed response are slow, decrease the setting value.

  • If hunting or oscillation occur, increase the setting value.

0.500 s

0.300 s to 1.000 s

The drive cannot find speed response for low speed or high speed.

  • C5-07 [ASR Gain Switchover Frequency] 4

  • High speed

    C5-01 [ASR Proportional Gain 1]

    C5-02 [ASR Integral Time 1]

  • Low speed

    C5-03 [ASR Proportional Gain 2 (P)] 3

    C5-04 [ASR Integral Time 2]

Change the ASR proportional gain and ASR integral time to conform to the output frequency.

  • C5-07 = 0.0 Hz

  • C5-01 = 10.00

  • C5-02 = 0.500 s

  • C5-03 = 20.00

  • C5-04 = 0.500 s

C5-07: 0.0 to maximum output frequency

Hunting or oscillation

C5-06 [ASR Delay Time] 4

  • If torque or speed response are slow, decrease the setting value in increments of 0.010.

  • If the rigidity of the machine is unsatisfactory and vibration is possible, increase the setting value.

0.004 s

0.004 s to 0.020 s

When you operate the drive at a frequency close to zero speed, the motor rotates at a frequency slightly higher than the frequency reference.

  • E1-09 [Minimum Output Frequency]

  • n4-70 [Speed Command Comp @ Low Freq]

  • Set E1-09 > 0.

    Note:

    When frequency reference E1-09 < 0, the drive output will turn OFF.

  • Decrease the setting value of n4-70 in 0.1 Hz increments.

    Note:

    If you set the value too low, the motor can rotate in reverse.

  • E1-09 = 0.0 Hz

  • n4-70 = 1.00 Hz

  • E1-09 = 0.5 Hz

  • n4-70 = 0.50 Hz
 
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 setting for o2-04 [Drive Model Selection] changes.

3

Refer to the section on C5-xx parameters for more information about speed control (ASR).

4

The best values for a no-load operation are different than the best values for actual loading operation.