PLC-FORTH-IDEA-SKELETON-DRAFT

\ See for introduction:
\ https://my.ece.utah.edu/~ece3510/Ladder%20Logic%20Fundamentals%20PLC%20tutorial.pdf

\ Draft    Skeleton only!!!
\ -------------------------
\ PINs etc set up here .................

: Ladder_Handler    \ A RUNG is just a step (program line) on the ladder

     Input1? Input2 AND      ( --------- comment xzxzxzxzx-----------) IF BuzzerON!  THEN \ RUNG1
     InputX? InputY OR       ( --------- comment lkjhlkhjlk ---------) IF AnyAction  THEN \ RUNG2
     I1 I2 AND I3 OR I4 AND  ( --------- comment lkjhlkhjlk ---------) IF ActionXYZ  THEN \ RUNG3
     XYZtoHOT?               ( --------- comment lkjhlkhjlk ---------) IF HotAlarm!  THEN \ RUNG3
\        ................etc....................
\        .......................................
\        .......................................
\        .......................................
\        .......................................
;

: My-PLC
     Repeat
        Scan_Input 	 \ All REAL inputs are read, On/Off/Value, and mapped before any action!
        Ladder_handler   \ Set outputs On/Off/Value in MAPPED output
        Activate_Output  \ Apply output map to REAL outputs
        Key? RUN-SWITCH? 0= OR
     Until
;