F3115

Error, brake check time interval exceeded

Bosch Rexroth · IndraDrive MPx02

What does F3115 mean?

This fault indicates that the programmed time interval for performing a safety-related brake check has been exceeded on the IndraDrive MPx02. This is a safety monitoring function to ensure the holding brake's integrity, and exceeding the interval implies the brake's reliability has not been recently verified.

Common Causes

  • Brake check not initiated or completed within the configured time interval (e.g., P-0-0536, 'Sercos brake check time').
  • Machine or application conditions preventing the execution of the brake check within the timeframe.
  • Faulty holding brake, brake control, or brake monitoring feedback.
  • Incorrectly set time interval for the brake check, making it too short for the application.

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Initiate a manual brake check and ensure it completes successfully.

  2. 2

    Verify the configured brake check time interval (e.g., P-0-0536) in the IndraDrive MPx02 to ensure it is appropriate for the application's duty cycle.

  3. 3

    Check the holding brake's wiring, power supply, and mechanical function. Ensure it releases and engages correctly.

  4. 4

    Inspect the feedback signals from the brake (if applicable) for correct operation, indicating brake status.

  5. 5

    Review the machine's operational sequence to identify if a condition is preventing the timely execution of the brake check.

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Verified technical data. Last updated: March 2026

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Source: Bosch Rexroth IndraDrive MPx02