Configures the task to acquire samples on the rising and/or falling edges of the lines or ports you specify. To detect both rising and falling edges on a line or port, wire the name of that line or port to both rising edge physical channels and falling edge physical channels.


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Inputs/Outputs

  • ci32.png samples per channel —

    samples per channel specifies the number of samples to acquire from each channel in the task if sample mode is Finite Samples. This VI returns an error if the specified value is negative.

  • ci32.png sample mode —

    sample mode specifies if the task acquires samples continuously or if it acquires a finite number of samples.

    Continuous Samples (10123)

    Acquire samples until the DAQmx Stop Task VI runs.

    Finite Samples (10178)

    Acquire a finite number of samples.

    Hardware Timed Single Point (12522)

    Acquire samples continuously using hardware timing without a buffer. Hardware timed single point sample mode is supported only for the sample clock and change detection timing types.

  • cgenclassrntag.png task/channels in —

    task/channels in is the name of the task or a list of virtual channels to which the operation applies. If you provide a list of virtual channels, NI-DAQmx creates a task automatically.

  • cdaqmxscale.png rising edge physical channels —

    rising edge physical channels specifies the names of the digital lines or ports on which to detect rising edges. The DAQmx physical channel constant lists all lines and ports for devices installed in your system.

    You also can wire a string that contains a list or range of digital lines or ports to this input.

  • cdaqmxscale.png falling edge physical channels —

    falling edge physical channels specifies the names of the digital lines or ports on which to detect falling edges. The DAQmx physical channel constant lists all lines and ports for devices installed in your system.

    You also can wire a string that contains a list or range of digital lines or ports to this input.

  • cerrcodeclst.png error in —

    error in describes error conditions that occur before this VI or function runs.

    The default is no error. If an error occurred before this VI or function runs, the VI or function passes the error in value to error out. If an error occurs while this VI or function runs, the VI or function runs normally and sets its own error status in error out. Use the Simple Error Handler or General Error Handler VIs to display the description of the error code. Use error in and error out to check errors and to specify execution order by wiring error out from one node to error in of the next node.

  • igenclassrntag.png task out —

    task out is a reference to the task after this VI or function runs. If you wired a channel or list of channels to task/channels in, NI-DAQmx creates this task automatically.

  • ierrcodeclst.png error out —

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

    Right-click the error out indicator on the front panel and select Explain Error from the shortcut menu for more information about the error.