In an industrial process, there may be a conveyor belt with an electric motor that moves the manufactured products from the factory floor to the warehouse.
I’m going to write a simple PLC program for this system with the following conditions:
1) The motor is going to turn on when the start switch is pressed and it’s going to turn off when the stop switch is pressed.
2) The manufactured products are going to be counted based on the received incoming signal of the photo eye sensor to the PLC input.
Let’s assume that there are already 100 products in the warehouse and I need the counter to start counting from this preset value.
I have two conveyor belts, two sensors and a temporary product storage area. The products are passing in front of sensor number one on the conveyor belt and entering the storage area.
The products will then be put on the second conveyor belt, pass in front of the sensor number two, and transferr...
There is a bottle filling machine that fills the empty bottles on a conveyor belt with liquid from this tank. In this and the next lessons you’re going to learn how this machine works and how to write a professional PLC program that fully controls this machine.
This filling machine has three op...
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