F13.23

Internal fault

SEW Eurodrive · MOVIDRIVE system

What does F13.23 mean?

Encoder 1 is reporting an internal fault status, indicating a malfunction within the encoder hardware or software. This compromises the accuracy and reliability of position feedback, potentially causing drive control issues.

Common Causes

  • Minor hardware anomaly within Encoder 1, such as a failing internal diagnostic circuit or transient memory error.
  • Intermittent power supply instability to Encoder 1, causing its internal self-monitoring system to trigger a non-critical fault.
  • Degradation of internal optical or magnetic components within Encoder 1 over time, leading to reduced signal quality.
  • Firmware integrity issue within Encoder 1, potentially due to an interrupted update or corrupted memory segment.

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Measure the supply voltage to Encoder 1 at its input terminals (e.g., +10V to 0V or +24V to 0V) for stability and correct level.

  2. 2

    Cycle power to the drive and Encoder 1, then observe if the internal fault clears upon restart.

  3. 3

    Check for any documented firmware updates for Encoder 1 that address known internal fault conditions.

  4. 4

    Monitor the ambient temperature around Encoder 1 to ensure it is operating within its specified temperature range.

  5. 5

    If accessible, perform an internal diagnostic check on Encoder 1 using manufacturer-specific software or tools.

Browse all codes in this manual (60)
Verified technical data. Last updated: March 2026

Related Faults

Source: SEW Eurodrive MOVIDRIVE system
SEW Eurodrive F13.23 — How to resolve: Internal fault | ErrorLib