There is this very crazy idea just popping to my head... My very first hands on PLC is very much transistors, relay coils, timers, counters and a few light bulbs and a motor. I simply write down the ladder logic on paper and set course to wirings. At that time, I think it's the cheapest way to simulate how a PLC runs. lolis
regards
Sherine T.
ps. ignore me, I'm falling a little crazy these few days.