F109-60
Plausibility fault in the incremental encoder connection
SEW Eurodrive · MOVIDRIVE MDX60B/61B Variable Speed Drive
What does F109-60 mean?
A phase fault has occurred in the incremental or SIN/COS encoder connection. This indicates an issue with the signal integrity from the encoder.
Source: SEW Eurodrive MOVIDRIVE MDX60B/61B Variable Speed Drive
Open Manual (Page 214)