Summary

Congratulations! You have successfully completed another chapter of this book. Good job! PLC is the brain behind most modern automated machines and programming is key when automating a machine with PLC. You should now understand latching and unlatching, know how to use an output address as input, and be familiar with timer, counter, move, and compare instructions. You should also be able to write programs using the techniques and instructions explained in the chapter. Simulation, which is key, was also discussed. You should be able to simulate your program after writing to know whether it will work. The final two sections of this chapter were the most interesting, where we looked into some real-life applications of some of the techniques learned in the chapter (that is, level control using PLC and an automated filling, capping, and wrapping system using PLC). Try to get your hands dirty with them.

In the next chapter, we will learn about the Human Machine Interface (HMI...