From the course: Introduction to PLC and Industrial Automation
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Introduction to PLC Ladder Logic programming - Ladder Logic Tutorial
From the course: Introduction to PLC and Industrial Automation
Introduction to PLC Ladder Logic programming
- Ladder logic is one of the languages used for programmable logic controllers, or PLCs. The name ladder logic programming came from the fact that the program at the end looks similar to a ladder with different instructions and rungs. In PLC ladder logic programming inputs are written on the left-hand side of the ladder logic, and outputs are written on the right-hand side. The same applies for each line. The inputs are on the left-hand side, the outputs are on the right-hand side. The left and right rails indicate the positive and ground of a power supply. If you are taking notes, write this down. This is how to properly read a ladder logic program. The logic is read from left to right as following. When the switch is on, the light is on, from left to right. Each line is called a rung. The rungs represents how the program is designed. If we have multiple rungs, the way we read the program is from left to right, top to…
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