Control Fault

What does CF mean?

This fault can stem from various issues including incorrect motor parameter settings, an excessively low torque limit, or an over-sized load inertia relative to the drive's deceleration capability. It also occurs if wiring errors exist between the motor and drive, if Line-to-line Resistance Tuning has not been performed, or if a Run command is issued while the motor is still coasting. Unresolved control faults can lead to poor motor performance, unexpected stops, or damage to the motor/drive due to improper control.

Additional Steps

Steps 1–2 are listed in Priority Fix.

1. 3

   If load inertia is large, adjust deceleration times (C1-02, C1-04, C1-06, C1-08) or ensure the drive stops deceleration before issuing new commands.

2. 4

   Verify motor and drive wiring for correctness and perform Stationary Auto-Tuning for Line-to-Line Resistance if not already done.

3. 5

   Examine the sequence and input the Run command only after the motor fully stops, or set b3-01 = 1 [Speed Search at Start Selection = Enabled]. Perform a Fault Reset.