IMAQ Get Buffer VI

NI-IMAQ VI

IMAQ Get Buffer VI

Installed With: NI Vision Acquisition Software

Returns one or all acquired images from a one-shot acquisition. IMAQ Get Buffer waits until the requested buffer has been acquired before returning an image.

IMAQ Get Buffer

crn.gif

IMAQ Session In identifies the device.

ci32.gif

Buffer Number (-1:all) is the cumulative number of the acquired buffer to return.

If Buffer Number is –1, the VI returns all image buffers using the Images Out output.

ci32.gif

Timeout (ms) specifies the amount of time, in milliseconds, to wait for each buffer to be acquired. The VI returns with a timeout error is the image or images are not acquired within the specified amount of time.

cerrcodeclst.gif

error in (no error) 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 the Simple Error Handler or General Error Handler VIs to display the description of the error code. 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.

cbool.gif

status is TRUE (X) if an error occurred before this VI or function ran or FALSE (checkmark) to indicate a warning or that no error occurred before this VI or function ran. The default is FALSE.

ci32.gif

code code is the number identifying an error or warning. If status is TRUE, code is a non-zero error code. If status is FALSE, code can be zero or a warning code. Use the error handler VIs to look up the meaning of this code and to display the corresponding error message.

cstr.gif

source describes the origin of the error or warning and is, in most cases, the name of the VI or function that produced the error or warning. The default is an empty string.

i1di32.gif

Frame Numbers is reserved for future use.

irn.gif

IMAQ Session Out has the same value as IMAQ Session In.

i1dgenclasstagrefflat.gif

Images Out is the array of image references. It contains all images in the buffer list if Buffer Number equal –1.

igenclasstagrefflat.gif

Image Out is a reference to the image.

ierrcodeclst.gif

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.

ibool.gif

status is TRUE (X) if an error occurred or FALSE (checkmark) to indicate a warning or that no error occurred.

ii32.gif

code is the error or warning code. If status is TRUE, code is a nonzero error code. If status is FALSE, code is 0 or a warning code.

istr.gif

source describes the origin of the error or warning and is, in most cases, the name of the VI or function that produced the error or warning. The default is an empty string.