AUTO TUNING FAULT

What does tnF mean?

This fault indicates that the auto-tuning procedure, which measures motor parameters, was unsuccessful. This can happen if motor parameters are incorrectly configured prior to auto-tuning, or if the procedure is interrupted.

• Incorrect configuration of motor parameters ([Rated motor volt.] (UnS), [Rated motor freq.] (FrS), [Rated mot. current] (nCr), [Rated motor speed] (nSP), [Motor 1 Cosinus Phi.] (COS)) before performing auto-tuning.
• Auto-tuning procedure was interrupted or did not complete successfully.
• The [Auto-tuning state] (tUS) parameter on page 43 or 103 reports [Failed] (FAIL).

Click steps to track your progress.

1. 1

   Verify that parameters [Rated motor volt.] (UnS), [Rated motor freq.] (FrS), [Rated mot. current] (nCr), [Rated motor speed] (nSP), and [Motor 1 Cosinus Phi.] (COS) are correctly configured (page 43).

2. 2

   Repeat the [Auto tuning] (tUn) operation (page 43).

3. 3

   Ensure no command has been activated and no "freewheel stop" or "fast stop" function is assigned to a logic input during auto-tuning.