Home > Support > NI Product Manuals > LabVIEW Communications System Design Suite 1.0 Manual
  1. On the VI tab, in the Editing group, select Create New SubVI to add an empty subVI node to an existing VI diagram. LabVIEW creates a new .gvi file and adds it to the project. This file corresponds to the subVI node that appears on the diagram.
  2. Double-click the subVI and switch to the Diagram to begin adding code to the subVI.
  3. Switch to the Icon view and add inputs and outputs to pass data in and out of the subVI. The inputs and outputs you add to the subVI icon must correspond to inputs and outputs on the diagram.

To add the new subVI as a node on other diagrams, locate the subVI in the Files pane and drag it to the diagram where you want to use it.

Note  

LabVIEW automatically updates all instances of the subVI with most changes you make to the subVI. However, if you remove or rearrange inputs and outputs on a subVI, wires attached to those inputs and outputs break in VIs that call the subVI. Fix the calling VIs by deleting the broken wires and rewiring the updated inputs and outputs.