Creates a timing source that sends ticks to a Timed Loop on rising or falling edges of a digital signal. NI-DAQmx uses the counter you specify to detect the edges of the digital signal. Use this VI to base a timing source on an external digital signal or on an internal digital signal not included in the instance of the DAQmx Create Timing Source VI.


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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.

  • cdaqmxscale.png counter —

    counter specifies the name of the counter to use for the timing source. The DAQmx physical channel constant lists all physical channels, including counters, for devices installed in the system.

    You also can wire a string that contains a name of a counter to this input.

  • cdaqmxscale.png source —

    source specifies the terminal to which you connect the digital signal you want to use for the timing source. A DAQmx terminal constant lists all terminals available on devices installed in the system. You also can specify a source terminal by wiring a string that contains a terminal name.

  • ci32.png edge —

    edge specifies on which edges of the digital signal you want to send ticks to the Timed Loop.

    Falling (10171)

    Send ticks on falling edges.

    Rising (10280)

    Send ticks on rising edges.

  • 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.

  • cu32.png edge count —

    edge count specifies the number of edges of the digital signal that must occur for the timing source to send a tick to the Timed Loop. For example, if you set this value to 3, the timing source sends a tick to the Timed Loop on every third edge of the digital signal.

  • 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.