From the course: Learning PLC Ladder Logic: 2 Diving Deeper
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Example: Sequential process - Ladder Logic Tutorial
From the course: Learning PLC Ladder Logic: 2 Diving Deeper
Example: Sequential process
- [Instructor] Let's take this sequence example and create a state diagram for it, and then, programming it using the sequential method ladder logic. So, here we have a sequence process where we need to paint a part and load it into a box. The process goes this way. First, we put the part, and then press on the start pushbutton to start the conveyor. Then, a sensor detects a part in the middle, and the conveyor stops. A paint is turned on for three seconds. After three seconds are done, the conveyor is on again. A box sensor detects the part when it reaches the end, and finally, place it in a box. The sequence repeats until 10 parts are painted. These are the steps for the sequence. The first thing we need to do is to identify the inputs and outputs, which makes it easier when developing a state diagram. As for the inputs, we have a start pushbutton, sensor that detects the parts, and the box sensor. As for the outputs,…
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Contents
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Introduction to sequence logic59s
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Introduction to state diagrams2m
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Example: Develop a state diagram43s
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Solution: Develop a state diagram2m 26s
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Understand bottle style logic1m 20s
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Example: Sequential process1m 48s
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Solution 1: Develop the state diagram3m 24s
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Solution 2: Bottle logic for state 11m 50s
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Solution 3: Control section2m 53s
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Solution 4: Output section2m 28s
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Solution 5: Using the software5m 12s
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