I was wondering if there is any difference between the two codes I have attached. They are simple codes, but, I would like to understand main and subvi better. I saw this type of coding in one of the examples.
Notice the second example has a 'while' loop but the STOP=TRUE. This means that it runs only once everytime. But, why should you specifically have a while loop with a STOP=TRUE? How is it different from the first one? Is it just good programming? THanks!
There is no point to the while loop in your 2nd jpeg. There are subVI's that have a True wired to the stop terminal with a purpose. They are called functional global variables or Action Engines Those have uninitialized shift registers that can store data between calls of the subVI.
Also note that there is no delay in the main while loops. This will cause a high CPU usage for no good reason.
Use a "Wait(ms)" or "Wait Until Next ms Multiple" function to give the CPU time for other tasks.
Yea, I always use delay in while loops, lest my CPU would max out. I put this example up in like a minute without giving so much thought into detail I guess.