[QUOTE=Docbradd;38514]May I have a brief explanation of Statement Logic vs. Ladder Logic? I am assuming you are talking about computer programming - I’ve done considerable real-time programming, but not with oil rig systems.
Thanks,[/QUOTE]
From my old ivory tower https://engineering.purdue.edu/ME576/manual/lab_9/siemensTutorialManualSm.pdf that i think you will relate to since it gets into the stack level programming. Basically: Statement Lists (or blocks) is a bunch of AND’s OR’s NOT’s and a bunch of other almost assembly level commands. Ladder is a visual display with AND as switches/contacts in series and OR as them in parallel with NC contacts NOT’ed. It’s like the difference between C (and assembly) and VB (or Java) with everything having to do with the compiler as usual; some code can’t be compiled into Ladder.