F8135

Velocity exceeded with trend monitoring

Bosch Rexroth · IndraDrive MPx02

What does F8135 mean?

This fatal error indicates that the motor velocity has exceeded a pre-defined threshold while trend monitoring was active on the IndraDrive MPx02. This suggests an uncontrolled acceleration or overspeed condition that violates safety or operational limits, triggering an immediate shutdown.

Common Causes

  • Incorrectly set velocity limit parameter (e.g., S-0-0091 'Maximum velocity') for the application.
  • Loss of control due to incorrect gain settings in the velocity controller.
  • External mechanical force driving the motor beyond its commanded speed.
  • Defective encoder or feedback system providing erroneous velocity readings.
  • Commanded velocity exceeding the configured limits or physical capabilities of the motor/load.

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Review and verify the velocity limit parameters (e.g., S-0-0091) in the IndraDrive MPx02, ensuring they are appropriate for the application and machine capabilities.

  2. 2

    Check the tuning of the velocity controller, especially proportional (Kp) and integral (Ki) gains, for stability.

  3. 3

    Inspect the mechanical system for any external forces or loads that could be driving the motor uncontrollably.

  4. 4

    Verify the motor encoder for accurate feedback. Check for loose connections, damage, or contamination affecting signal quality.

  5. 5

    Monitor the commanded and actual velocity values during operation to identify where and when the limit is exceeded.

Browse all codes in this manual (99)
Verified technical data. Last updated: March 2026

Related Faults

Source: Bosch Rexroth IndraDrive MPx02