Table Of Contents

IMAQdx Wait for IO Signal Edge (G Dataflow)

Last Modified: August 19, 2019

Performs a synchronous wait for an edge on an IO signal.

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session in

Unique reference to the camera, which you can obtain with the IMAQdx Initialize node.

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signal type

The IO signal type to wait for.

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signal number

The line number of the IO signal type to wait for.

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signal edge

The signal edge to wait for.

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timeout

Time, in milliseconds, to wait for the requested buffer to become available. A value of -1 indicates to wait indefinitely. A value of -2 indicates to use the value of the Timeout attribute in place of this parameter.

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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

Unique reference to the camera. session out is the same as session in.

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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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