08

n-Monitoring

SEW Eurodrive · MOVIDRIVE compact System (MCF/MCV/MCS4_A)

What does 08 mean?

Immediate switch-off because the speed controller or current controller is operating at its setting limit. This can be due to mechanical overload, a phase failure in the power supply or motor, an incorrectly connected encoder, or exceeding the maximum speed (nmax) during torque control.

Common Causes

  • Motor speed (n) is not within the expected monitored range during operation.
  • Discrepancy between commanded speed and actual motor speed.
  • Faulty speed feedback mechanism or motor performance deviation.

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Reduce the mechanical load on the motor.

  2. 2

    Increase the deceleration time setting (P501 or P503) to allow for longer deceleration.

  3. 3

    Check the encoder connection; if necessary, swap A/A and B/B signal pairs to correct direction.

  4. 4

    Verify the encoder voltage supply is stable and within specifications.

  5. 5

    Check the current limitation settings (e.g., P303 for maximum current).

  6. 6

    Extend acceleration/deceleration ramps if current limits are being hit.

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Verified technical data. Last updated: March 2026

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Source: SEW Eurodrive MOVIDRIVE compact System (MCF/MCV/MCS4_A)