| Fault Code | Description | Common Cause | Immediate Action | | :--- | :--- | :--- | :--- | | | Output Overcurrent (Instantaneous) | Short circuit in motor cables; defective motor winding. | Disconnect power. Megger test motor insulation. | | F102 | Ground Fault | Phase-to-ground short inside motor or cable. | Check all cable glands and terminals for moisture or chafing. | | F103 | Overload (I²t) | Mechanical jam; extended stall condition. | Manually rotate driven load. Check gearbox bearings. | | F110 | Dynamic Braking Overload | Regenerative power exceeds braking resistor capacity. | Increase deceleration time; check resistor for open circuit. | | F112 | Short Circuit on Output Phase U | Power transistor (IGBT) failure in U-leg. | Replace PPCR221 power module. Do not reset without repair. |
A: Likely a shared 24V power supply dropping voltage due to a cleaning robot or other automated system starting up. Install a dedicated 24V, 10A PSU for the PPCR221 alone. Last updated: October 2025. This guide is based on Rexroth firmware version V4.23 and higher for the PPCR221 series. rexroth ppcr221 fault codes full
A: Yes. Send a control word bit (typically bit 7 of STW) via Profisafe or Modbus. But local reset is safer. | Fault Code | Description | Common Cause
This is common in high-vibration environments. Use a syringe of electronic contact cleaner on the hall sensor connector. If the fault returns weekly, replace the motor feedback board. Category 4: Communication & Fieldbus Faults (Profibus, Profinet, EtherCAT) The PPCR221 often acts as a slave on a factory network. A communication fault will not stop the motor instantly, but it will cause a controlled stop. | | F102 | Ground Fault | Phase-to-ground
| 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. |