DAQmx Start Trigger (Analog Edge) VI

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.

source is the name of a virtual channel or terminal where there is an analog signal to use as the source of the trigger.

For E Series devices, if you use a channel name, the channel must be the first channel in the task. The only terminal you can use for E Series devices is PFI0.

slope specifies on which slope of the signal to start acquiring or generating samples when the signal crosses level.

level specifies at what threshold to start acquiring or generating samples. Specify this value in the units of the measurement or generation. Use slope to specify on which slope to trigger at this threshold.

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.

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.

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.