Reads live data from shared variables and displays the data in a waveform chart. You must wire a VI Server reference of this waveform chart to the Trend Reference input to use this Express VI.


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Dialog Box Options

Inputs/Outputs

  • cbool.png Scale To (%) —

    Specifies the mode to chart the data. Set this input to TRUE to use engineering units. Set this input to FALSE to use a percentage of the full scale.

  • cwcrn.png Trend Reference —

    Specifies the control reference to a waveform chart.

  • cdbl.png Time Between Updates (s) —

    Specifies the time to wait before attempting to read data from the network.

  • c1dgenclassrntag.png Shared Variable List —

    Lists the shared variables to display in the waveform chart.

  • ibool.png Shutdown —

    Returns whether the shared variables are live. If this parameter is FALSE, the data that appears on the waveform chart is live shared variable data. If this parameter is TRUE, the shared variable has no value and the waveform chart displays a flat line.

  • ierrcodeclst.png error —

    Returns any error or warning condition from the Express VI.

  • i2ddbl.png Trend Data —

    Returns the real-time data points to display. Wire this output to a waveform chart.