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    What would be a reason to adjust the analog input bias or analog input gain on an ATV212 drive?

    Issue:
    Adjustment to the bias and gain of the ATV212 drive.

    Product Line:
    ATV212

    Environment:
    All models and serial numbers

    Cause:
    None

    Resolution:
    One reason for changing the analog input bias and gain is that the speed reference signals may not be linear.  
    Example: If the drive is being sent a speed reference of 4mA signal with low speed (LL) at 0 hz but the drive runs above 0 hz. parameter F470 can be adjusted down so that the drive runs at 0 hz.  Or, on the upper end of the 4-20mA scale if the drive is being sent 20mA and the frequency only goes to 59 hz parameter F471 can be adjusted up to that the speed reaches 60 hz.
     

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