Creates a timing source that uses a combination of the sample clock and the specified sleep time to determine when to send ticks to a Timed Loop. You must create an analog input task that uses sample clock timing and wire that task to the task/channels in input of this VI. Do not use the DAQmx Start Task VI to start the task. The Timed Loop starts the task automatically. National Instruments recommends that you use this instance instead of the instance for best performance with Timed Loops.


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Inputs/Outputs

  • cstr.png timing source name —

    timing source name is the name to assign to the timing source this VI creates.

  • 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.

  • cdbl.png sleep time (us) —

    sleep time (us) specifies in microseconds the amount of time the Timed Loop sleeps after each sample clock pulse. The default sleep time is 0. This input is ignored if you are not using a real-time OS.

  • 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 completes execution.

  • istr.png timing source out —

    timing source out is the name of the timing source this VI creates. Wire this output to the source input of the Input Node of a Timed Loop.

    If you specified a name for the timing source in the timing source name input, this output contains the same name. If you did not specify a name for the timing source, NI-DAQmx creates a name and sets this output to that name.

  • 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.