Rexroth IndraDrive Error Code F8012

Rexroth PLC & VFD Major Drive

Model: IndraDrive | Code: F8012

Applicable Systems
EFC FEX FEI HNC

Symptoms

The drive reports F8012 during auto compensation. The travel range during the auto-tuning procedure exceeded the maximum allowed limit, indicating a possible mechanical issue or incorrect motor parameters.

Possible Causes

  • Encoder cable shielding damage causing signal interference
  • Encoder internal component failure (optical disc contamination, photosensor aging, chip damage)
  • Drive power module IGBT aging causing false current detection
  • Incorrect encoder type or parameter settings in the drive configuration
  • Insufficient cooling or blocked airflow causing thermal trip

Troubleshooting Steps

  1. Step 1: Inspect encoder cable for physical damage, check shielding continuity and grounding
    Cable intact, shielding properly grounded at both ends
  2. Step 2: Use oscilloscope to measure encoder feedback signal waveforms (A/B phases should be clean square waves with 90 degree phase offset)
    Clean square wave signals with correct phase relationship
  3. Step 3: Check drive encoder type setting matches actual encoder (incremental vs absolute)
    Encoder type parameter matches the physical encoder
  4. Step 4: For thermal faults (E2074): clean heatsink, check fan operation, measure three-phase current balance
    Fan operational, heatsink clean, current balance within 5%
  5. Step 5: If signal issues persist after cable and parameter checks, replace encoder or drive module
    Fault clears after component replacement

How to Reset

To reset: 1) Fix the root cause (encoder cable, signal interference, cooling, or parameter error). 2) Clear the fault via HMI or parameter interface. 3) Restart the drive. For auto-compensation faults (F8010-F8016), re-run the auto-tuning procedure after fixing the issue. Caution: Repeated trips without fixing the root cause will permanently damage drive components.

Frequently Asked Questions

  • Q: What causes Rexroth drive fault F8012?

    Auto Compensation: Maximum Travel Range. The drive reports F8012 during auto compensation. The travel range during the auto-tuning procedure exceeded the maximum allowed limit, indicating a possible mechanical issue or incorrect motor parameters.

  • Q: How do I test the encoder signal on a Rexroth drive?

    Use an oscilloscope to measure the encoder feedback signals. For incremental encoders, A and B phases should show clean square waves with 90 degree phase offset, and frequency should vary with motor speed. For absolute encoders, check the battery voltage and serial communication signal.

Related Rexroth Fault Codes

Source: Bosch Rexroth IndraDrive Manual; baijiahao.baidu.com (Rexroth servo drive fault codes); szsfwx.com; 11467.com; chem17.com; oil-gift.com

Category: PLC & VFD