43
Communication timeout (RS-485)
SEW Eurodrive · MOVIMOT MM..D With AC Motor DRS
What does 43 mean?
A communication timeout occurred during cyclical communication via the RS-485 interface. Upon this error, the drive will decelerate and stop along its set ramp. Communication must be re-established to re-enable the drive.
Common Causes
- Interrupted or faulty communication link between the RS-485 master and MOVIMOT® inverter
- Exceeded the maximum number of slaves (8 MOVIMOT® inverters) connected to the RS-485 master for cyclical communication when the timeout interval is set to 1 second
Repair Steps & Checklist
Click steps to track your progress.
- 1
Check and establish the communication link between the RS-485 master and MOVIMOT® inverter
- 2
Verify the number of slaves connected to the RS-485 master, ensuring it does not exceed 8 MOVIMOT® inverters for cyclical communication with a 1-second timeout interval
- 3
Reset the error by switching off the DC 24 V supply voltage
- 4
Reset the error via the control system or dedicated reset function
Verified technical data. Last updated: March 2026
Related Faults
Source: SEW Eurodrive MOVIMOT MM..D With AC Motor DRS