| Error Code | Symptom | Likely Cause | Solution | | :--- | :--- | :--- | :--- | | | Drive powers off randomly | Undervoltage or loose DC bus | Check terminal torque; monitor supply for dips below 20V. | | E-204 | Motor vibrates at low speed | Autotune failed due to extreme backlash | Manually reduce P-gain by 30%; retune. | | E-307 | No communication with PLC | Incorrect node ID or baud rate | Set node ID via dip switches (see page 34 of manual). | | E-412 | Over-temperature warning | Airflow blocked or high ambient temp | Install external fan or derate current by 20%. | | E-589 | Feedback loss during jog | Broken encoder cable or bad connector | Inspect pins; replace cable with Belden 9773. |
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