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    How does the ATV630 Process drives stall function work?

    Issue:
    How does the ATV630 Process drives stall function work?

    Product Line:
    Altivar 630, Process drive

    Environment:
    All

    Cause:
    Stall function

    Resolution:
    This function helps to prevent a motor overload by monitoring the motor current and the speed rise time. 
    A stalling condition is when: 
    An output frequency is smaller than the stalling frequency [Stall Frequency] StP3 
    And an output current is higher than the stalling current [Stall Current] StP2 
    During a time longer than the stalling time [Stall Max Time] StP1 
    That means that you must meet three conditions, then a stalling condition occurs, an [Motor Stall Error] StF error is triggered. 

    For example,
    Set StP3=10HZ, StP2=100% (meaning rated motor current)
    StP1=5s 
    When the drive is running at 9.9HZ, motor current is above rated motor current, then after 5S, an [Motor Stall Error] StF error is triggered. 
    If the drive is running at 10.1HZ, an StF error is not triggered. 

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