Following error (tolerance exceeded)

What does P03 mean?

This fault indicates that the actual position or speed of the motor has deviated from the commanded set-point by more than an acceptable tolerance. This typically suggests a dynamic control issue, insufficient motor torque, or mechanical problem. By default, this condition is configured as a "Message without pulse inhibit", meaning it alerts the operator and is logged, but it does not stop the drive. However, persistent following errors can indicate a problem affecting process quality or system wear.

Additional Steps

Steps 1–2 are listed in Priority Fix.

1. 3

   Verify motor sizing and torque: Ensure the motor has sufficient torque capacity for the application's acceleration and load requirements.

2. 4

   Check feedback device: Verify the encoder or resolver is providing accurate and reliable feedback.

3. 5

   Increase following error limit: If the process can tolerate it, adjust parameter C255 (Following error limit) to a higher value, but only after ruling out other issues.