BeginnerInput Map~12 min

Input Map

Field wiring gives you awkward signal polarities: an NC-wired stop, a sensor that's TRUE when there's NO part. Map raw inputs to clean internal tags first, so the rest of the program reads like plain English.

New here? How to use it

Your goal

  • Map StopNC (TRUE = healthy, NC-wired) to internal StopOK.
  • Map PartNC (TRUE = no part present) to internal PartPresent, inverted.
  • Motor runs only when Run is ON, StopOK is ON, and PartPresent is ON.
Stuck? Show hints (3)
  1. Rung 1: NO StopNC → OTE StopOK (a straight copy the mapping documents intent).
  2. Rung 2: NC PartNC → OTE PartPresent (the inversion happens HERE, once, instead of all over the program).
  3. Rung 3: NO Run, NO StopOK, NO PartPresent in series → OTE Motor. Notice how readable that rung is.

Pattern from Contact & Coil's classic ladder logic series.

I/O for this exercise6 tags · show
Inputs
StopNCStop circuit, NC-wired (TRUE = not pressed)
PartNCPart sensor (TRUE = NO part)
RunRun command switch
Outputs
MotorMotor contactor
Internal coils
StopOKMapped: stop circuit healthy
PartPresentMapped: part present
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