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Thread: Scaling values in Zenon 8.2

  1. #1
    Join Date
    15.04.2021
    Posts
    3

    Ausrufezeichen Scaling values in Zenon 8.2

    Hi all,

    I'm polling values from a PLC using DNP3_TG driver. The PLC provides analog values for Phase Currents, Voltages, Power....

    Some of the data needs to be linear scaled down/up by 10 to represent the correct measurement.

    Is there a way to do it in Zenon? I don't want to go through the route of creating a IEC-61131 Zenon Logic to do this.

    Is it possible to adjust the scaling using the linear value adjustment?

    Any leads would be of great help!


    Thanks
    VIKHASH

  2. #2
    Join Date
    01.07.2008
    Location
    Salzburg, AT
    Posts
    1,040

    Default Re: Scaling values in Zenon 8.2

    Variable properties node 'Value calculation':
    - in section 'Value range PLC' - value 1:1 like received from the PLC (so you can left like it is)
    - in section 'Value adjustment linear' - value range you want to scale to.
    - consider the use of property 'Decimal' for fractions.

    example: PLC delivers measured value (REAL/LREAL) of some Voltage in range of DINT
    - decimals = 1
    - value range PLC: min = -2147483648, max=2147483647
    - adjustment: min =-11000.0, max = +11000.0
    As result zenon displays value scaled to 11kV in 0.1V precision

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