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    How does the Ramp Divider (DCF) affect the deceleration time when the Fast Stop function is used on the ATV61 and ATV71 drives?

    Issue:
    How does the Ramp Divider (DCF) affect the deceleration time when the Fast Stop function is used on the ATV61 and ATV71 drives?

    Product Line:
    Altivar 61 and 71

    Environment:
    All models

    Cause:
    How to figure the resulting ramp time.

    Resolution:
    When using the Fast stop assignment to a logic input (FST = LIx) or as the Type of Stop (STT = FST), the Ramp divider (DCF) affects the normal DEC setting:

    Fast stop ramp time = DEC / DCF

    If DEC = 20sec and DCF = 2, then the fast stop ramp is 20 / 2 = 10sec
    If DEC = 20sec and DCF = 4, then the fast stop ramp is 20 / 4 = 5sec

    Note that DCF = 0 produces an abrupt stop.

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