Er.602 Angle auto-tuning failure fault in inovance IS650 servo drive the automatic tuning process for the angle control loop has failed. This could be due to various reasons, including mechanical issues, electrical noise, or incorrect parameter settings.

1. Modify the mechanical system to reduce resonance or adjust the drive's parameters to compensate.
2. Use a high-quality power supply and consider using a power filter.
3. Use shielded cables and proper grounding techniques to reduce noise.