Causes

Possible Solutions

The stall prevention during deceleration setting is incorrect.

  • Examine the setting for L3-04 [Decel Stall Prevention Selection].

  • When the drive has a dynamic braking option installed, set L3-04 = 0 [Disabled].

  • If the drive detects ov [Overvoltage], set L3-04 = 3 [General Purpose w/ DB resistor].

The deceleration time setting is too long.

Set C1-02, C1-04, C1-06, or C1-08 [Deceleration Times] to applicable values.

The motor torque is not sufficient.

Use a larger motor.

Note:

If these items are correct, the demand on the motor is more than the motor capacity:

  • Parameter settings are correct.

  • The drive does not detect ov [Overvoltage].

The drive and motor system reached the torque limit.

  • Examine the values set in L7-01 to L7-04 [Torque Limit] and increase them if necessary.

    Note:

    If the torque limit is enabled, deceleration time can increase because the drive cannot output more torque than the limit.

  • If H3-02, H3-10 = 10, 11, 12, 15 [MFAI Function Select = Torque Limit], examine the settings for the MFAIs.

    • Examine the values set in H3-02 and H3-10.

    • Use U1-13, U1-14 [Terminal A1, A2 Input Voltage] to make sure that the analog input values set to terminals A1 and A2 are applicable.

The load is more than the internal torque limit as specified by the drive rated current.

Replace the drive with a larger capacity model.