VISA Discard Events Function

Owning Palette: Event Handling VIs and Functions

Requires: Base Development System

Discards all pending occurrences of the specified event type and mechanism from the specified session.

This function discards information about all the event occurrences that have not yet been handled. This behavior is useful if you want to remove event occurrences that an operation no longer needs. Discarded event occurrences are not available to a session at a later time.

Example

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	VISA resource name specifies the resource to be opened. The VISA resource name control also specifies the session and class.
	event type is the logical event identifier. You can select from the following VISA event types. Service Request 0x3FFF200B Trigger 0xBFFF200A Clear 0x3FFF200D VXI Signal 0x3FFF2020 VXI/VME Interrupt 0xBFFF2021 VXI/VME Sysfail 0x3FFF201D VXI/VME Sysreset 0x3FFF201E GPIB CIC 0x3FFF2012 GPIB Talk 0x3FFF2013 GPIB Listen 0x3FFF2014 PXI Interrupt 0x3FFF2022 Serial Break 0x3FFF2023 Serial TermChar 0x3FFF2024 Serial CTS 0x3FFF2029 Serial DSR 0x3FFF202A Serial DCD 0x3FFF202C Serial RI 0x3FFF202E Serial Character 0x3FFF2035 USB Interrupt 0x3FFF2037 All Enabled (default) 0x3FFF7FFF Refer to the NI-VISA Help for more information about event types.
	mechanism specifies the event handling mechanism to be disabled. Currently only accepts VI_QUEUE (1).
	error in describes error conditions that occur before this node runs. This input provides standard error in functionality.
	VISA resource name out is a copy of the VISA resource name that VISA functions return.
	error out contains error information. This output provides standard error out functionality.

Example

Refer to the Detect Serial Break Event VI in the labview\examples\Instrument IO\Serial directory for an example of using the VISA Discard Events function.

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