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. 1

    Check and establish the communication link between the RS-485 master and MOVIMOT® inverter

  2. 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. 3

    Reset the error by switching off the DC 24 V supply voltage

  4. 4

    Reset the error via the control system or dedicated reset function

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Verified technical data. Last updated: March 2026

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Source: SEW Eurodrive MOVIMOT MM..D With AC Motor DRS