VISA Unmap Trigger Function

Owning Palette: Bus/Interface Specific Functions

Requires: Base Development System

Unmaps a previous map from the specified trigger source line to the specified trigger destination line. This function unmaps one trigger mapping per call.

Details  

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	VISA resource name specifies the resource to be opened. The VISA resource name control also specifies the session and class.
	trigger source is the source line used in the previous map. This input accepts the following values. 0–7 VXI/PXI TTL Line 0–VXI/PXI TTL Line 7—Unmap the specified trigger line. 8 VXI ECL Line 0—Unmap the specified VXI ECL trigger line. 9 VXI ECL Line 1—Unmap the specified VXI ECL trigger line. 27 Front Panel Input—Unmap the controller's front panel trigger input line. 28 Front Panel Output—Unmap the controller's front panel trigger output line.
	trigger destination is the destination line used in the previous map. This input accepts the following values. –2 All Connected Lines—Unmap all trigger lines to which the source is currently connected. 0–7 VXI/PXI TTL Line 0–VXI/PXI TTL Line 7—Unmap the specified VXI TTL trigger line. 8 VXI ECL Line 0—Unmap the specified VXI ECL trigger line. 9 VXI ECL Line 1—Unmap the specified VXI ECL trigger line. 27 Front Panel Input—Unmap the controller's front panel trigger input line. 28 Front Panel Output—Unmap the controller's front panel trigger output line.
	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.

VISA Unmap Trigger Details

If VISA Map Trigger was previously called multiple times on the same backplane resource and created multiple mappings for either trigger source or trigger destination, trigger mappings that you do not specify in trigger source or trigger destination in this function remain in effect when the unmap operation completes.

Note  This function does not accept VISA sessions of class Instr. The VISA session must be of class PXI Backplane or VXI/GPIB-VXI Backplane.