Your VI is doing (surprise!) exactly what you are telling it to do. You've forgotten how Data Flow programming works -- everything "inside" a Structure (like a Case Statement!) needs to finish before any of the outputs of the Case Statement become available.
What takes place inside the Case Statement? You use your Ring structure (please substitute an Enum, call the three values "Fill", "Hold", and "Drain" -- you'll see when you wire the Enum to the Case Selector and tell the Case Statement to create a Case for Every Value you will have three Cases named "Fill", "Hold", and "Drain" -- makes understanding the code so much simpler than remembering that 1 means Drain, 2 means Fill, and 3 means Stop the Program) to choose which action you want to do, then you fill the whole tank (which takes 100 * 100 ms = 10 seconds, then "Presto", the tank is full.
Do you see the fix? (Sometimes the solution to a programming problem is not adding more code ...)
Bob Schor
P.S. -- for this assignment, I recommend using I32 instead of Dbl quantities -- the dark blue is much more restful on the eyes ...
