Control Fault

What does CF mean?

This fault indicates issues stemming from incorrectly set motor parameters, excessive load inertia, an inappropriate stopping method, or incorrect motor/drive wiring. It can also be triggered if a Run command is received while the motor is coasting or if line-to-line resistance tuning has not been completed. The drive detects this fault if the torque reference exceeds the torque limit for 3 seconds or longer during deceleration, posing a risk of uncontrolled stopping or motor damage.

Additional Steps

Steps 1–2 are listed in Priority Fix.

1. 3

   Verify all motor and drive connections for wiring errors, and ensure Stationary Auto-Tuning for Line-to-Line Resistance is performed.

2. 4

   Review the control sequence to ensure Run commands are only issued after the motor has fully stopped; alternatively, enable Speed Search at Start (b3-01 = 1).

3. 5

   Confirm that the stopping method (b1-03) is correctly configured to match the machine's capabilities and operational requirements.