Table Of Contents

IviCounter Read (G Dataflow)

Version:
    Last Modified: October 24, 2017

    Initiates and fetches a measurement based on the preset configuration. Notes: You must configure measurement type and inputs before calling this node.

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    instrument handle

    The instrument handle that you obtain from IviACPwr Initialize or IviACPwr Initialize With Options. The handle identifies a particular instrument session.

    Default: None

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    error in

    Error conditions that occur before this node runs.

    The node responds to this input according to standard error behavior.

    Standard Error Behavior

    Many nodes provide an error in input and an error out output so that the node can respond to and communicate errors that occur while code is running. The value of error in specifies whether an error occurred before the node runs. Most nodes respond to values of error in in a standard, predictable way.

    error in does not contain an error error in contains an error
    If no error occurred before the node runs, the node begins execution normally.

    If no error occurs while the node runs, it returns no error. If an error does occur while the node runs, it returns that error information as error out.

    If an error occurred before the node runs, the node does not execute. Instead, it returns the error in value as error out.

    Default: No error

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    maximum time

    Pass the maximum length of time in which to allow the read operation to complete.

    Express this value in milliseconds. If the operation does not complete within this time interval, the node returns the IVICOUNTER_ERROR_MAX_TIME_EXCEEDED (0xBFFA2003) error code. When this occurs, you can call IviCounter Abort to cancel the read operation and return the instrument to the Idle state.

    Defined Values:

    • IVICOUNTER_VAL_MAX_TIME_INFINITE (-1) - Wait indefinitely for a timeout.
    • IVICOUNTER_VAL_MAX_TIME_IMMEDIATE (0) - Do not wait for a timeout.

    Default Value: 5000 ms

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    Note  

    The Maximum Time parameter affects only this node. It has no effect on other timeout parameters or properties.

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    instrument handle out

    The instrument handle that you obtain from IviACPwr Initialize or IviACPwr Initialize With Options.

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    error out

    Error information.

    The node produces this output according to standard error behavior.

    Standard Error Behavior

    Many nodes provide an error in input and an error out output so that the node can respond to and communicate errors that occur while code is running. The value of error in specifies whether an error occurred before the node runs. Most nodes respond to values of error in in a standard, predictable way.

    error in does not contain an error error in contains an error
    If no error occurred before the node runs, the node begins execution normally.

    If no error occurs while the node runs, it returns no error. If an error does occur while the node runs, it returns that error information as error out.

    If an error occurred before the node runs, the node does not execute. Instead, it returns the error in value as error out.
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    measurement

    Returns the measured value.

    The units depend on the Measurement Function you select as shown below.

    Measurement Function Units
    Rise Time seconds
    Fall Time seconds
    Frequency hertz
    Frequency Ratio units
    PRF hertz
    Period seconds
    Phase degrees
    Negative seconds
    Width Positive seconds
    Cycle Negative percent
    Duty Cycle Positive percent
    Time Interval seconds
    Totalize occurrences

    Where This Node Can Run:

    Desktop OS: Windows

    FPGA: Not supported

    Web Server: Not supported in VIs that run in a web application


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