TAILIEUCHUNG - PLC Programming Methods and Applications P1

Machine control design is a unique area of engineering that requires the knowledge of certain specific and unique diagramming techniques called ladder diagramming. Although there are similarities between control diagrams and electronic diagrams, many of the component symbols and layout formats are different. This chapter provides a study of the fundamentals of developing, drawing and understanding ladder diagrams. | Programmable Logic Controllers Programming Methods and Applications by John R. Hackworth and Frederick D. Hackworth Jr. Table of Contents 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 Preface 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. It seems to the authors that it would be more advantageous to approach the study of PLCs using a general language that provides a thorough knowledge of programming concepts that can be adapted to all controllers. This language would be based on a collection of different manufacturer types with generally the same programming technique and capability. Although it would be impossible to teach one programming language and technique that would be applicable to each and every programmable controller on the market the student can be given a thorough insight into programming methods with this general approach which will allow .

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