Consider an inspection and packaging station on a production line. Parts (heavy) are delivered onto the station one by one, where they are inspected by an operator. If the part quality is good, operator pushes the blue momentary push button which actuates a pneumatic cylinder that pushes the part into its location in the round box. If part quality is bad, he pushes the purple momentary push button which actuates a pneumatic cylinder that pushes the part into a scrap container.
The round packaging box holds 8 pieces, once full, a pneumatic cylinder pushes the box into a wrapping track and another pneumatic cylinder pushes a new empty round box into position.
Note that a safety requirement in your program is to inhibit pushing new parts into the container while replacing containers.
You are asked to assemble and program a similar station using the following components as illustrated in the figure:
1. 4 pneumatic cylinders.
2. 2 push buttons.
3. PLC.
Notes:
1. In the operation of the project, the parts and containers are just imaginary components; you are required to show the proper operation of the stations without them.
2. All parts should be controlled using PLC, where the used lab PLC has only four outputs and 8 inputs.
3. All cylinders full extension must be implemented without using limit switches.
