# IMAQdx Configure Grab (G Dataflow)

Configures and starts a grab acquisition.

A grab performs an acquisition that loops continually on a ring of buffers. Use the IMAQdx Grab node for high-speed image acquisition and to copy an image out of the buffer. If you call this node before calling the IMAQdx Initialize node, the IMAQdx Configure Grab node uses cam0 by default. Use the IMAQdx Unconfigure Acquisition node to unconfigure the acquisition.

## session in

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

## Number of Buffers

The number of buffers the driver uses internally for the continuous acquisition.

## 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

## session out

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

## 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