Question 3

Design ladder logic for 3 way-traffic light control system

The traffic light is one of the classic examples in PLC ladder logic. We can take three directions (North, South, west, and east) with three outputs (Green, Red, and Yellow) lamp as output. You can build your own concept for making logic for this example.

3 way traffic light control ladder logic

Following tabular column is the sample logic for the three-way traffic light,

Traffic light control Sequence

Write the ladder logic for this 3-way traffic light control using the above sequence.

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