Sketch a Ladder Diagram for PLC to Energize the Lamp

Sketch a Ladder Diagram program for this PLC to energize the lamp if the following input conditions are met.

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Programmable Logic Controller Questions and Answers

Suppose we have a PLC connected to three pushbutton switches as shown in this illustration:

PLC Questions - 1

Sketch a Ladder Diagram program for this PLC to energize the lamp if the following input conditions are met:

  • Switch A pressed
  • Switch B pressed
  • Switch C unpressed

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Credits : by Tony R. Kuphaldt

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