Timeout of communication
Timeout of communication (RS-485)
SEW Eurodrive · MOVIMOT Field Distributor
What does Timeout of communication mean?
Communication timeout occurred between the MOVIMOT unit and the RS-485 master, causing the motor to stop without generating a specific error code. This indicates a disruption in the data link.
Common Causes
- Missing physical connection (ground, RS+, RS-) between MOVIMOT and RS-485 master.
- Electromagnetic interference (EMC) affecting the data cables.
- Incorrect protocol type (cyclical) where the time between individual telegrams exceeds 1 second.
Repair Steps & Checklist
Click steps to track your progress.
- 1
Check the physical connection, especially the ground, RS+, and RS- terminals, between the MOVIMOT and the RS-485 master and repair any identified issues.
- 2
Inspect the shielding of the data cables and improve it if necessary to mitigate EM interference.
- 3
Shorten the telegram cycle time or select the "acyclical" protocol type if using a cyclical protocol with a cycle time exceeding 1 second.
Verified technical data. Last updated: March 2026
Related Faults
Source: SEW Eurodrive MOVIMOT Field Distributor