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Boolean Logic

AND, OR, XOR and the seal-in circuit

The starting point for every PLC program: combine inputs with AND, OR and XOR, then build the seal-in circuit that lets a motor keep running after you release the start button.

  1. 0

    Turns on a lamp while a push button is pressed and off when released.

    Lamp Follow

    EXERCISE
    Difficultyeasy
    Statusunknown
  2. 1

    Controls a lamp to be the logical inverse of a push button.

    Lamp Inverted

    EXERCISE
    Difficultyeasy
    Statusunknown
  3. 2

    Turns on a lamp only when both push buttons are pressed simultaneously.

    Two-Button Lamp

    EXERCISE
    Difficultyeasy
    Statusunknown
  4. 3

    Turns on a lamp when either of two push buttons is pressed.

    Either-Button Lamp

    EXERCISE
    Difficultyeasy
    Statusunknown
  5. 4

    Turns on a lamp when exactly one of two push buttons is pressed.

    Xor Gate

    EXERCISE
    Difficultyeasy
    Statusunknown
  6. 5

    2-of-3 majority voting for a lamp output.

    Voting Lamp

    EXERCISE
    Difficultyeasy
    Statusunknown
  7. 6

    Selects and routes one of two REAL inputs to the output based on a boolean selector switch.

    Select Between

    EXERCISE
    Difficultyeasy
    Statusunknown
  8. 7

    Start/Stop motor controller with seal-in latch and stop priority.

    Start/Stop Motor

    EXERCISE
    Difficultyeasy
    Statusunknown
  9. End