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Programmable Logic Controller (PLC) Questions and Answers – 20

Programmable Logic Controllers Questions and Answers

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

PLC Circuit Answers

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

  • Either switch A or switch B pressed
  • Switch C unpressed

Answer :

PLC Circuit ladder Answers

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Credits : by Tony R. Kuphaldt – under CC BY 1.0

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1 comment

Santosh April 13, 2020 at 8:29 am

The ladder u have shown .in answer is wrong …

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Programmable Logic Controller (PLC) Questions and Answers - 20

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