Version 1.0, August 31, 2001, Copyright, Hugh Jack 1993-2001
· Assuming that the PLC is much faster than the fastest event (i.e. no aliasing), then we can approximate the timing diagram above with a simpler form.
· As an example consider the ladder logic for a SLC-150,
· In most PLCs these will keep their last state even when the PLC is turned off, and back on.
· Write a short ladder logic program that will,
