Most textbooks related to programmable controllers start with the basics of ladder logic, Boolean algebra, contacts, coils and all the other aspects of learning to program PLCs. However, once they get more deeply into the subject, they generally narrow the field of view to one particular manufacturer’s unit (usually one of the more popular brands and models), and concentrate on programming that device with it’s capabilities and peculiarities. This is worthwhile if the desire is to learn to program that unit. However, after finishing the PLC course, the student will most likely be employed in a position designing, programming, and maintaining systems using PLCs of another brand or model, or even more likely, many machines with many different brands and models of PLC.
Chapter 1 - Ladder Diagram Fundamentals, Chapter 2 - The Programmable Logic Controller, Chapter 3 - Fundamental PLC Programming, Chapter 4 - Advanced Programming Techniques, Chapter 5 - Mnemonic Programming Code, Chapter 6 - Wiring Techniques, Chapter 7 - Analog I/O, Chapter 8 - Discrete Position Sensors, Chapter 9 - Encoders, Transducers, and Advanced Sensors, Chapter 10 - Closed Loop and PID Control, Chapter 11 - Motor Controls, Chapter 12 - System Integrity and Safety.
identify the parts of an electrical machine control diagram including rungs, branches, rails, contacts, and loads. recognize the diagramming symbols for common components such as switches, control transformers, relays, fuses, and time delay relays. We shall begin with a study of the fundamental components used in electrical machine controls and their ladder diagram symbols. It is important to understand that the material covered in this chapter is by no means a comprehensive coverage of all types of machine control components. Instead, we will discuss only the most commonly used ones. Some of the more exotic components will be covered in later chapters.
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