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Configure Trigger (Configure Digital Edge Reference Trigger) (G Dataflow)

Last Modified: September 27, 2017

Configures the Reference trigger for digital edge triggering.

If the Reference trigger is asserted before the required number of pretrigger samples are acquired, it is ignored. This node is valid only for acquisition sessions.

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session in

Instrument session obtained from the Initialize Acquisition Session node, the Initialize Generation Session node, or the Initialize External Calibration node.

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error in

Error conditions that occur before this node runs.

The node responds to this input according to standard error behavior.

Standard Error Behavior

Many nodes provide an error in input and an error out output so that the node can respond to and communicate errors that occur while code is running. The value of error in specifies whether an error occurred before the node runs. Most nodes respond to values of error in in a standard, predictable way.

error in does not contain an error error in contains an error
If no error occurred before the node runs, the node begins execution normally.

If no error occurs while the node runs, it returns no error. If an error does occur while the node runs, it returns that error information as error out.

If an error occurred before the node runs, the node does not execute. Instead, it returns the error in value as error out.

Default: No error

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source

The specified trigger source.

You can choose PFI <0..3>, PFI <24..31>, PXI Trigger Line/RTSI <0..7>, PXI STAR Line, or PXIe DStarB.

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Note  

Only the PXIe-6555/6556 devices support PFI <24..31> and PXIe DStarB.

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edge

The specified edge to detect.

Name Value Description
Rising edge 12 The trigger asserts on the rising edge of the digital signal.
Falling edge 13 The trigger asserts on the falling edge of the digital signal.

Default: Rising edge

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pretrigger samples

The number of pretrigger samples the device must receive before the Reference trigger is acknowledged.

Default: 500

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session out

Handle that identifies the session in all subsequent node calls.

The session out parameter is obtained from the Initialize Acquisition Session node or the Initialize Generation Session node.

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error out

Error information.

The node produces this output according to standard error behavior.

Standard Error Behavior

Many nodes provide an error in input and an error out output so that the node can respond to and communicate errors that occur while code is running. The value of error in specifies whether an error occurred before the node runs. Most nodes respond to values of error in in a standard, predictable way.

error in does not contain an error error in contains an error
If no error occurred before the node runs, the node begins execution normally.

If no error occurs while the node runs, it returns no error. If an error does occur while the node runs, it returns that error information as error out.

If an error occurred before the node runs, the node does not execute. Instead, it returns the error in value as error out.

Where This Node Can Run:

Desktop OS: Windows

FPGA: Not supported

Web Server: Not supported in VIs that run in a web application


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