In a section of a factory there are two conveyor belts that are used to move pieces from one sector to another. Next to each conveyor belt, there is a photo eye sensor installed to keep track of the boxes and also commanding the electrical motors to start and stop.
In this and the next lesson, I'm going to walk you through a step by step process to write a PLC program that can control this machine.
In the previous lesson you learned how the machine works and what the input and output components are. In this lesson, I'm going to start writing a PLC program that would be able to control the machine in the best possible way.
The PLC program that I'm going to write is going to address three...
In part 3 of the material handling PLC program I'm going to test the program in the online mode and then continue writing the program based on what I want the PLC program to do for me.
The first problem that this PLC program has is that when the full blue box is transferred to another section...
In the previous lesson I added the address of the start switch in the reset input of the signal lamp flip-flop and now I'm able to run motor 1 by pressing the start switch but the problem is that as soon as I take my hand off the switch the motor is going to stop again!
The other problem that t...
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