F3135

Dynamization pulse width incorrect

Bosch Rexroth · IndraDrive MPx02

What does F3135 mean?

The pulse width used for dynamization of safety-related signals is incorrect. Dynamization pulses are short test signals applied to safety inputs/outputs to detect wiring faults. An incorrect pulse width means the diagnostic test may not be effective, potentially missing latent faults in the safety circuit and compromising safety integrity.

Common Causes

  • Incorrect dynamization pulse width parameter setting
  • Internal safety module output driver fault
  • External load affecting pulse characteristics
  • Software error in pulse generation logic
  • Mismatched pulse width settings between safety components

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Verify drive parameters related to safety I/O dynamization (e.g., pulse width, test interval) against application specifications and connected safety device requirements.

  2. 2

    Inspect all safety-related wiring for proper connection, shielding, insulation integrity, and compliance with installation guidelines.

  3. 3

    Measure the 24VDC supply voltage at the safety I/O terminals and external safety devices to ensure it is within specified tolerance.

  4. 4

    Check the specifications and operational status of any external safety devices connected to the affected safety I/O for compatibility with the drive's dynamization scheme.

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Verified technical data. Last updated: March 2026

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Source: Bosch Rexroth IndraDrive MPx02