How does the ATV630 Process drives stall function work?

The Motor Stall Protection function helps prevent motor overload by monitoring both motor current and speed.A Motor Stall Error (StF) is triggered only when all three of the following conditions are met simultaneously:

1. The output frequency is below the configured [Stall Frequency] (StP3).
2. The output current is above the configured [Stall Current] (StP2).
3. These conditions persist for longer than the configured [Stall Max Time] (StP1).

Example

Configuration:

• StP3 (Stall Frequency) = 10 Hz
• StP2 (Stall Current) = 100% (motor rated current)
• StP1 (Stall Max Time) = 5 seconds

Results:

• If the drive operates at 9.9 Hz and the motor current exceeds the rated current, an StF (Motor Stall Error) is triggered after 5 seconds.
• If the drive operates at 10.1 Hz, the stall condition is not met and no StF error is triggered, even if the motor current exceeds the configured threshold.

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