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ErrorLib — Industrial Fault Code Library

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F109-66

Plausibility fault SSI encoder connection (slave mode)

SEW Eurodrive · MOVIDRIVE MDX60B/61B Variable Speed Drive

What does F109-66 mean?

The connected encoder type does not correspond to the configuration for an SSI encoder operating in slave mode. This indicates a mismatch in setup.

Common Causes

  • SSI encoder communication fault when configured as slave.
  • Master device not sending valid SSI commands.
  • Data transfer error over the SSI interface in slave mode.
  • Faulty SSI interface on the slave encoder.

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Check configuration.

  2. 2

    Check connected encoder.

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

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F108-101Internal processing fault PROFIsafeF108-103Internal processing fault PROFIsafeF108-105Internal processing fault PROFIsafe
Source: SEW Eurodrive MOVIDRIVE MDX60B/61B Variable Speed Drive
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