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4066

Test move velocity is too high

ABB · ACS850 Standard Program Firmware

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During velocity autotuning, the calculated test move velocity exceeds the configured `DriveSpeedMax` parameter. This indicates a mismatch between the desired tuning speed and the drive's maximum allowed operating speed, which can cause unsafe operation, tuning failures, or unexpected drive trips.

Vanlige årsaker

  • Parameter P1-05 (DriveSpeedMax) is configured below the calculated test move velocity required for autotuning.
  • Motor encoder resolution (e.g., P5-01, P5-02) is incorrectly set, leading to an overestimation of motor speed during tuning.
  • Application-specific gearing or mechanical ratios are not correctly accounted for in the drive's speed scaling parameters.
  • Drive's internal velocity controller gain (e.g., P7-01 Kp_vel) is excessively high, causing an overshoot during test moves.

Reparasjonssteg & Sjekkliste

Klikk på steg for å spore fremgangen.

  1. 1

    Verify the DriveSpeedMax parameter (e.g., P1-05) setting against the motor's nominal speed and the application's actual maximum speed. Adjust P1-05 higher if appropriate.

  2. 2

    Confirm the motor encoder resolution setting (e.g., P5-01, P5-02) accurately matches the encoder datasheet specifications.

  3. 3

    Reduce the target test move velocity parameter (e.g., P2-10, P2-11) for autotuning to a value below the current DriveSpeedMax setting.

  4. 4

    Monitor the motor's actual speed via drive diagnostic screen (e.g., P0-03) during a test move after parameter adjustments.

  5. 5

    Temporarily increase the acceleration/deceleration ramps (e.g., P3-01, P3-02) for the tuning process to smooth speed transitions.

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Verifisert teknisk data. Sist oppdatert: March 2026

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Kilde: ABB ACS850 Standard Program Firmware