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 main parts of the sequence as follows:
1. Running motor 1
2. Counting the small red boxes passing in front of sensor 1
3. Turning on the "full" signal lamp, shutting down motor 1 and running motor 2 all at the same time
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...
As I said previously, I also have a reset switch for this machine. In this lesson, I'm going to add an open contact to the reset input of the counter so that when the reset switch is pressed the accumulated value for the counter is going to be reset to zero.
At the end, when the PLC program is c...
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