F109-152

Difference level RS485 driver. Fault Faulty "A" or "DATA" signal

SEW Eurodrive · MOVIDRIVE MDX60B/61B Variable Speed Drive

What does F109-152 mean?

A fault is detected in the RS485 driver, specifically with the 'A' or 'DATA' signal. This is usually caused by no encoder connection or an incorrect encoder type being connected.

Common Causes

  • RS485 communication line issue between driver and controller.
  • Faulty 'A' or 'DATA' signal wire integrity.
  • Incorrect RS485 configuration or addressing.
  • Intermittent connection on the RS485 bus.

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Check encoder connection.

  2. 2

    Check encoder cabling.

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

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Source: SEW Eurodrive MOVIDRIVE MDX60B/61B Variable Speed Drive