Closes a device session or event object specified by VISA resource name.


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Inputs/Outputs

  • cvsrn.png VISA resource name —

    VISA resource name specifies the resource to be opened. The VISA resource name control also specifies the session and class.

  • cerrcodeclst.png error in (no error) —

    error in describes error conditions that occur before this node runs. With the following exception, this input provides standard error in functionality.

    This node runs normally even if an error occurred before this node runs.

  • ierrcodeclst.png error out —

    error out contains error information. This output provides standard error out functionality.

    • Error I/O operates uniquely in this function. The function closes the device session regardless of whether an error occurred in a preceding operation. For each VISA session that you open, you should close the session when you are finished with it. This function accepts all available classes.

    You also can use the Open VISA Session Monitor VI in the labview\vi.lib\Utility\visa.llb to close all open VISA sessions. Alternatively, you could save work, exit, and re-enter LabVIEW. Exiting LabVIEW closes all open VISA sessions. You also can select the Automatically close VISA sessions option on the Environment page of the Options dialog box.

    Examples

    Refer to the following example files included with LabVIEW.

    • labview\examples\Instrument IO\Serial\Continuous Serial Write and Read.vi
    • labview\examples\Instrument IO\VISA\PXI\PXI - Route Trigger.vi
    • labview\examples\Instrument IO\GPIB\GPIB with VISA functions.vi
    • labview\examples\Instrument IO\VISA\USB\USB RAW - Interrupt.vi