The symbol shown in the ladder diagram can be thought of as a contact that is...

Gracious ...




and it ALWAYS – ALWAYS – ALWAYS just tells the processor to "Go Look For A ONE" in the BIT/BOX with the specified address ...

if the processor finds a ONE – then it's happy – and the instruction will be evaluated as TRUE ... if the processor does NOT find a ONE – then it's unhappy – and the instruction will be evaluated as FALSE ...


party on ...
.

I can not agree more.:)

And yes: it is as simple as that.:geek:

But if you do not think like that in relation to ladder-logic: it will get very messy.
 

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