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This module method controls the data returned by the trigger digital input line. You use this module method by selecting it in an FPGA I/O Method Node that is configured for the appropriate device and/or channel. Details Examples
|Trigger Mode is an enumeration of the following trigger mode options:
|AI High Threshold defines the upper threshold for the analog trigger circuit.|
|AI Low Threshold defines the lower threshold for the analog trigger circuit.|
|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. This VI or function runs normally only if no error occurred before this VI or function runs. If an error occurs while this VI or function runs, it runs normally and sets its own error status in error out. 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.
|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, it 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.
Use the Set Triggers Method to configure the trigger circuit on the module. Once the trigger circuit is configured, use an FPGA I/O Node configured to access the Trig channel to monitor the output of the trigger circuit. The trigger circuit does not automatically initiate any conversions on the module. It is up to the FPGA VI to monitor the Trig line, and then initiate a conversion using an FPGA I/O Node or the IO Sample method when the appropriate trigger event occurs.
Perform the following steps to trigger an acquisition using the Set Triggers Method:
Refer to the NI 9205 Basic Triggering VI and the NI 9205 Advanced Triggering VI in the labview\examples\CompactRIO\Module Specific\NI 9205\NI 9205 Basic Triggering\NI 9205 Basic Triggering.lvproj and labview\examples\CompactRIO\Module Specific\NI 9205\NI 9205 Advanced Triggering\NI 9205 Advanced Triggering.lvproj for examples of the triggering concepts discussed above.