@pauln: slide 15 is good as it stands to show the protocol layers, but to convey the increasing number of "onion layers" as one moves down the chart, it might work even better with the arrows starting close together and getting further apart as you move down the slide, and maybe even color coding to show the portion of the layer above that is wrapped with additional protocol in the next layer below.
For industrial control applications, or even a simple assembly line, that machine can go almost 24/7 without a break. But what happens when the task is a little more complex? That’s where the “smart” machine would come in. The smart machine is one that has some simple (or complex in some cases) processing capability to be able to adapt to changing conditions. Such machines are suited for a host of applications, including automotive, aerospace, defense, medical, computers and electronics, telecommunications, consumer goods, and so on. This discussion will examine what’s possible with smart machines, and what tradeoffs need to be made to implement such a solution.