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DAQmx Configure Watchdog Expiration States (Digital Output) (G Dataflow)

Version:
    Last Modified: February 6, 2017

    Configures the expiration states for a digital watchdog timer task.

    The DAQmx Watchdog properties contain additional watchdog timer configuration options.

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    task in

    task in is the name of the task to clear. Unlike the task/channels in input on some nodes, you cannot wire a virtual channel to this input.

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    expiration states

    expiration states contains the states to which to set digital physical channels when the watchdog timer expires. Each element of the array contains a digital physical channel name and the corresponding state for that digital physical channel.

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    physical channels

    physical channels is the digital line or port to modify. You cannot modify dedicated digital input lines. The DAQmx physical channel constant lists all lines and ports for devices installed in the system.

    You also can wire a string that contains a list or range of digital lines or ports to this input. If you have an array of lines or ports, use DAQmx Flatten Channel String to convert the array to a list.

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    expiration state

    expiration state specifies the state to which to set the digital physical channel when the watchdog timer expires.

    Name Description
    High

    High logic.

    Low

    Low logic.

    No Change

    Expiration does not affect the port. Do not change the state of any lines in the port, and do not lock the port. For example, if a line is high when the timer expires, that line stays high, and you can write new values to the line. You can select this value only for entire ports.

    Tristate

    High-impedance state. You can select this state only on devices with bidirectional ports, and you can select it only for entire ports. You cannot select this state for dedicated digital output lines.

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    error in

    error in describes error conditions that occur before this node runs. This input provides standard 'error in' functionality.

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    task out

    task out is a reference to the task after this node or function completes execution.

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    error out

    error out contains error information. If error in indicates that an error occurred before this node ran, error out contains the same error information. Otherwise, error out describes the error status that this node produces.

    Where This Node Can Run:

    Desktop OS: Windows

    FPGA: LabVIEW NXG does not support FPGA devices


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