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

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Rung operation case study, part 2

Rung operation case study, part 2 - Ladder Logic Tutorial

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

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Rung operation case study, part 2

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- [Instructor] Here is part two of the Conveyor Belt example. We are going to use the same previous example and add in some features to it. The new features are when the conveyor starts, when the conveyor is on, there are two green lights to indicate that the conveyor is working. When the conveyor stops, when the conveyor is not working, there is a red light indicating that the conveyor is off. So the inputs are start pushbutton and stop pushbutton. The outputs in this case are the conveyor, stop light, and the two green lights. In the previous section, we programmed how to start and stop the conveyor. So this is the ladder logic for the first part of the problem. Next we need to program that when the conveyor starts, when the conveyor is on, two green lights indicating that the conveyor is working. So we have one input and two outputs. The input in this case is the conveyor memory bit. Remember that inputs and outputs can be in internal bits. So now using the memory as its location…

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