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Configure Trigger (Immediate) (G Dataflow)

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Last Modified: August 1, 2019

Configures common properties for immediate triggering. Immediate triggering means the digitizer triggers itself.

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session in

Handle that identifies the NI-SCOPE instrument session as previously allocated by Initialize With Options.

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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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session out

Reference to the NI-SCOPE instrument session to pass to the next node in the program.

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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.

Trigger System Operation

When you initiate an acquisition, the trigger system operates in the following manner:

  • The digitizer waits for the start trigger, which is configured through the Start Trigger Source property. The default value is immediate.
  • Upon receiving the start trigger, the digitizer begins sampling pretrigger points.
  • After the digitizer finishes sampling pretrigger points, the digitizer waits for a reference (stop) trigger that you specify with an instance of Configure Trigger.
  • Upon receiving the reference trigger and then after completing posttrigger sampling, the digitizer finishes the acquisition.

You specify configuration parameters such as the trigger source and trigger delay with each Configure Trigger instance. Additionally, you can adjust the amount of pretrigger and posttrigger samples using reference position in Configure Horizontal Timing. The default is half the record length.

For multirecord acquisitions, all records after the first record are started based on the setting of the Advance Trigger Source property. The default value is immediate.

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Note  

Some features are not supported by all digitizers.

Where This Node Can Run:

Desktop OS: Windows

FPGA: Not supported

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

Hardware Support:

This node does not support the following hardware: PXIe-5622

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