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    Why the nvoDrvPwr readings are fluctuating below zero on ATV61 drive using Lonworks?

    Issue:
    In ATV61 drive with Lonworks, the nvoDrvPwr parameter readings are sometimes fluctuating below zero into negative power (i.e. -1kW). The range of the SNVT is from 0 to -1. Because when power is negative, the SNVT shows the highest power value i.e. 6553.4 kW. How can the the range of Drive Power be adjusted into a negative number? It works on Modbus and BACnet protocols but Lonworks does not allow.

    Product Line:
    ATV61

    Environment:
    All

    Cause:
    None

    Resolution:
    The scale is defined on a standard (LONMARK® Functional Profile: Variable Speed Motor Drive).
    The solution is to use Scanner Input 1 (set the address of OPr on this register and read using the Lonworks variable nvoScannerIn1).

    For more information, please see the file attached.

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