National Instruments BridgeVIEW 用户手册
Chapter 4
Human Machine Interface
4-28
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Figure 4-4. Process View Display VI
How Do You Initialize and Shut Down Multiple-Loop Applications?
When you have a multiple-loop application, you can add initialization code
before executing the loops, and some cleanup or shutdown code after all the
loops finish executing. You can use the Sequence structure for this purpose.
Put the initialization code in the first frame of the Sequence structure, put
all your loops in the second frame of the Sequence structure, and put the
shutdown code in your final sequence. This guarantees that none of your
loops start execution until your initialization code is complete and that all
loops complete execution before you execute the shutdown code.
Figures 4-7 and 4-8 demonstrate this technique.
before executing the loops, and some cleanup or shutdown code after all the
loops finish executing. You can use the Sequence structure for this purpose.
Put the initialization code in the first frame of the Sequence structure, put
all your loops in the second frame of the Sequence structure, and put the
shutdown code in your final sequence. This guarantees that none of your
loops start execution until your initialization code is complete and that all
loops complete execution before you execute the shutdown code.
Figures 4-7 and 4-8 demonstrate this technique.
You also can use dataflow programming to enforce sequential operation. In
some cases, your diagram might be easier to read using this technique. It is
possible that you might have some data flow between the initialization code
and the loops anyway. There is no difference in performance using either
technique. It is purely a diagram documentation issue. Figure 4-6 illustrates
using this technique.
some cases, your diagram might be easier to read using this technique. It is
possible that you might have some data flow between the initialization code
and the loops anyway. There is no difference in performance using either
technique. It is purely a diagram documentation issue. Figure 4-6 illustrates
using this technique.