F108-56
Faulty watchdog test
SEW Eurodrive · MOVIDRIVE MDX60B/61B Variable Speed Drive
What does F108-56 mean?
The watchdog test within the DCS..B option failed, indicating faulty feedback from the internal shutdown channel of the digital outputs. This implies a safety-critical monitoring failure.
Source: SEW Eurodrive MOVIDRIVE MDX60B/61B Variable Speed Drive
Open Manual (Page 208)