Draft lesson — skeleton content pending the founder’s course outline (issue #32).
Ladder logic descends directly from relay wiring diagrams: power rails on the sides, contacts (conditions) in the middle, coils (results) on the right.
In the IDE
Create a new project from your course template in C:\Projects, open PLC_PRG, and
add a rung:
- a normally-open contact bound to
bStartButton - a coil bound to
bMotorRun
Download to the PLC and set the PLC to Run. Toggle bStartButton from the watch
list and watch bMotorRun follow it — you’ve written the automation equivalent of
“hello, world”.
Why this matters
Every interlock, latch and sequence you’ll ever write reduces to arrangements of these two primitives plus timers and memory. Next: making an output stay on — the seal-in.