Add-on LabVIEW Toolkit GRAFCET

Integrate Sequential Function Charts
               in your LabVIEW^TM diagrams

The following VI is an animated example of a VI using Grafcet Designer Add-on.
In Visu mode (or Debug mode) you can visualize actives steps through their red blinking. Grafcet Designer uses breakpoints of LabVIEW to "blink" actives steps and let you follow the evolution of your SFC.

Of course in this debug mode, execution time is slow down in order to let you see what happens (as does LabVIEW debug mode). In normal execution state, your VI execute much more quickly.