From the course: Learning PLC Ladder Logic: 1 The Basics

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Branching operation and examples

Branching operation and examples - Ladder Logic Tutorial

From the course: Learning PLC Ladder Logic: 1 The Basics

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Branching operation and examples

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- [Announcer] Branching simply means adding more rungs that are associated with the same output, or having multiple outputs for the same inputs. We can also have a combination of both, like having multiple inputs and multiple outputs for each rung, all depending on the logic and how to solve the program. So let's take two examples to show how to do Branching. Let's say that we have a cooling fan that's turned on when two switches are turned on, or when a pushbutton is pressed. So, the two options to turn on the cooling fan are: two switches, both need to be on, or pressing the pushbutton. The way to programming is adding the two switches as an ADD, adding them in serious. Then, since the pushbutton is an OR, then I can just add it in the OR rung. Now the cooling fan is turned on, is activated by either the two switches or the pushbutton. So now let's use the simulation software to see how this program works. So notice here that switch one and switch two are added in serious, and the…

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