Week 15: Ladder Logic Diagrams, Switching Logics,

Ladder Logic(LAD)- An ON-OFF switch and a relay coil are the basic components of these method. These symbols emulates the real life components used in an actual control system and thus LAD logic can be understood by person having little or no specific knowledge of programming. The switches used can be normally open type or normally closed type depending on their use. The entire program can be written using these symbols in separate lines. The complete program structure looks like a ladder hence the name
 

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