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    Can the ATV312 be programmed for a fallback speed in the event of a loss of the 4-20mA speed reference signal?

    Issue:
    Can the ATV312 be programmed for a fallback speed in the event of a loss of the 4-20mA speed reference signal?

    Product Line:
    ATV31 and ATV312 drives

    Environment:
    All 

    Cause:
    NA

    Resolution:

    Yes.  In the FLt menu, program LFL to LFF and then set LFF to the desired fall back speed in Hz.

    Important note: The fallback speed will take precedence, regardless of whether you are currently using the 4-20mA signal for speed control.

    For example, if you are currently controlling speed with a potentiometer on AI1, and your 4-20mA signal drops on AI3, the drive will use the fallback speed even though you're currently not using the 4-20mA signal. Therefore, if you are not currently using the 4-20mA signal for speed control, you may want to set LFL to 'no', which will ignore 4-20mA signal loss.

    Details on these parameters are found in the ATV312 Programming Manual on page 96. 


    CTA-ID : 2061337

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