PLCs & Scada: Theory and Practice

PLCs & Scada: Theory and Practice

Pages: 1047

Contents:

SECTION 1INTRODUCTORY CONCEPTS

Chapter 1 Introduction to Programmable Controllers

1-1 Definition ……………………………………………………………………………………. 4

1-2 A Historical Background ……………………………………………………………….. 5

1-3 Principles of Operation………………………………………………………………… 10

1-4 PLCs Versus Other Types of Controls …………………………………………… 13

1-5 PLC Product Application Ranges …………………………………………………. 22

1-6 Ladder Diagrams and the PLC ……………………………………………………… 24

1-7 Advantages of PLCs ……………………………………………………………………. 26

Chapter 2 Number Systems and Codes

2-1 Number Systems ………………………………………………………………………… 34

2-2 Number Conversions …………………………………………………………………… 41

2-3 One’s and Two’s Complement ……………………………………………………… 43

2-4 Binary Codes ……………………………………………………………………………… 46

2-5 Register Word Formats ……………………………………………………………….. 50

Chapter 3 Logic Concepts

3-1 The Binary Concept ……………………………………………………………………. 56

3-2 Logic Functions ………………………………………………………………………….. 57

3-3 Principles of Boolean Algebra and Logic ………………………………………. 64

3-4 PLC Circuits and Logic Contact Symbology ………………………………….. 68

SECTION 2COMPONENTS AND SYSTEMS

Chapter 4 Processors, the Power Supply, and Programming Devices

4-1 Introduction ……………………………………………………………………………….. 82

4-2 Processors ………………………………………………………………………………….. 84

4-3 Processor Scan……………………………………………………………………………. 86

4-4 Error Checking and Diagnostics …………………………………………………… 92

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