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.