Causes

Possible Solutions

The frequency reference is in the Jump frequency range.

Adjust d3-01 to d3-03 [Jump Frequency 1 to 3] and d3-04 [Jump Frequency Width].

Note:

Enabling the Jump frequency prevents the drive from outputting the frequencies specified in the Jump range.

The upper limit for the frequency reference has been exceeded.

Set E1-04 [Maximum Output Frequency] and d2-01 [Frequency Reference Upper Limit] to the best values for the application.

Note:

This calculation supplies the upper value for the output frequency:

E1-04 × d2-01 / 100

A large load triggered Stall Prevention function during acceleration.

  • Decrease the load.

  • Adjust L3-02 [Stall Prevent Level during Accel].

L3-01 = 3 [Stall Prevent Select duringAccel = ILim Mode] has been set.

  1. Check whether the V/f pattern and motor parameter settings are appropriate, and set them correctly.

  2. If this does not solve the problem, and it is not necessary to limit the current level of stall during acceleration, adjust L3-02.

  3. If this does not solve the problem, set L3-01 = 1 [Enabled].

The motor is rotating at this speed:

b2-01 [DC Injection/Zero SpeedThreshold] ≤ Motor Speed < E1-09 [Minimum Output Frequency]

Set E1-09 < b2-01.