VISA Unmap Trigger Function

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


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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.

  • ci16.png trigger source —

    trigger source is the source line used in the previous map.

    This input accepts the following values.

    0–7VXI/PXI TTL Line 0–VXI/PXI TTL Line 7—Unmap the specified trigger line.
    27Front Panel Input—Unmap the controller's front panel trigger input line.
    28Front Panel Output—Unmap the controller's front panel trigger output line.
    8VXI ECL Line 0—Unmap the specified VXI ECL trigger line.
    9VXI ECL Line 1—Unmap the specified VXI ECL trigger line.
  • ci16.png trigger destination (all) —

    trigger destination is the destination line used in the previous map.

    This input accepts the following values.

    –2All Connected Lines—Unmap all trigger lines to which the source is currently connected.
    0–7VXI/PXI TTL Line 0–VXI/PXI TTL Line 7—Unmap the specified VXI TTL trigger line.
    27Front Panel Input—Unmap the controller's front panel trigger input line.
    28Front Panel Output—Unmap the controller's front panel trigger output line.
    8VXI ECL Line 0—Unmap the specified VXI ECL trigger line.
    9VXI ECL Line 1—Unmap the specified VXI ECL trigger line.
  • cerrcodeclst.png error in (no error) —

    error in describes error conditions that occur before this node runs. This input provides standard error in functionality.

  • ivsrn.png VISA resource name out —

    VISA resource name out is a copy of the VISA resource name that VISA functions return.

  • ierrcodeclst.png error out —

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

    • 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.