Reads a Tag Reader instance and returns a summary of the shared variables that this Tag Reader instance contains. This summary contains a URL list of these shared variables and the corresponding quality, status, and timestamp values of these shared variables.


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Inputs/Outputs

  • cTag_Readerlvclass.png —

    Tag Reader in specifies the data of a group of tags that the Open Tag Reader VI opens.

  • cerrcodeclst.png error in (no error) —

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

  • iTag_Readerlvclass.png —

    Tag Reader out returns the value of the Tag Reader instance.

  • i1dgenclassrntag.png shared variables —

    shared variables returns the URLs of the shared variables that the specified Tag Reader instance contains.

  • i1dcclst.png cached meta data —

    cached meta data returns the meta data of the shared variables that the specified Tag Reader instance contains.

  • iu32.png status —

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

  • iu64.png quality —

    quality returns the data quality of the tags. A value of zero indicates good quality. Refer to the quality output of the DataSocket Read function for detailed descriptions of the quality values. Use the Shared Variable Error from Quality VI to convert this code to an error I/O cluster.

  • iatrn.png timestamp —

    timestamp returns the timestamp data for shared variables and NI Publish-Subscribe Protocol (NI-PSP) data items.

  • ierrcodeclst.png error out —

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