The nodes on the NI-5640R Asynchronous Programming palette have several features that differ from traditional LabVIEW or LabVIEW FPGA nodes or VIs.

  • Many nodes are configurable as to the number and types of their terminals. These configurations are achieved by adding and removing terminals by right-clicking the nodes and selecting from the shortcut menu options. These options are described in more detail in the topics for the individual nodes.
  • Several nodes include selectable control elements. These control elements are represented by small graphics, or glyphs, on the nodes. These glyph controls provide an easy way to configure some behaviors of the nodes and their associated asynchronous wires. The glyph controls are described in more detail in the topics for the individual nodes.
  • All the nodes on the palette, except the read and write accessors, are free-running actors. Free-running actors can start executing as soon as the VI begins its execution. Free-running actors cannot be placed inside structures or sub VIs that are inside structures or are expected to return to their calling VI. You can connect dataflow wires to some free-running actors, but the node does not become free-running until that dataflow dependency is satisfied.