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RT code example

Global variable (RT)

Use a global variable to communicate between two parallel process loops contained within different VIs under the same target, and use a global variable to stop parallel loops with one "stop" button.

LabVIEW RT block diagrams: VI #1 writes a global variable, VI #2 reads the same global variable

Use cases


Keep in mind

LabVIEW block diagram elements

Locate these elements with "Quick Drop" (press Ctrl+Space and start typing the name); click on an icon to see more sample code that uses that element:

Global Variable
Flat Sequence Structure
Feedback Node

Example code

Expected results

https://youtu.be/G-kH06h3_Ck (1:15)

Developer walk-through

https://youtu.be/-r7Q8HCxpas (4:37)


For more information

  1. Stopping Parallel While Loops in LabVIEW with One Stop Button (http://digital.ni.com/public.nsf/allkb/267704CDE91156D186256F6D00711AAE)
    Stop multiple process loops with channel wires, local variables, property nodes, notifiers, and queues.