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
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
Confirm the motor encoder resolution setting (e.g., P5-01, P5-02) accurately matches the encoder datasheet specifications.
- 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
Monitor the motor's actual speed via drive diagnostic screen (e.g., P0-03) during a test move after parameter adjustments.
- 5
Temporarily increase the acceleration/deceleration ramps (e.g., P3-01, P3-02) for the tuning process to smooth speed transitions.