Hardware watchdog failure; typically requires unit replacement. System Fault Codes (F-Codes) F-codes represent failures that usually stop operation. 🌐 Optical & Communication Faults
| Fault Code | Description | Common Cause | Immediate Action | | :--- | :--- | :--- | :--- | | | Encoder Communication Error (EnDat) | Broken shield; faulty ribbon cable; noise interference. | Reseat encoder connector X8. Check for 5V supply between pins. | | F503 | Hall Sensor Invalid State | Three hall sensors giving an impossible pattern (e.g., 111 or 000). | Inspect hall sensor PCB inside motor. Replace if magnetized debris present. | | F510 | Resolver Mismatch | Motor feedback and drive resolver settings differ. | Compare P-0-0114 (Resolver poles) with actual motor. | | F512 | Speed Deviation Too High | Commanded speed vs. actual speed difference > threshold. | Mechanical binding; encoder coupling slipped. | rexroth ppcr221 fault codes full