Programmable Logic Controllers, Fifth Edition

A programmable logic controllers (PLC) is a real-time system optimized for use in severe conditions such as high/low temperatures or an environment with excessive electrical noise. This control technology is designed to have multiple interfaces (I/Os) to connect and control multiple mechatronic devices such as sensors and actuators. Programmable Logic Controllers, Fifth Edition, continues to be a straight forward, easy-to-read book that presents the principles of PLCs while not tying itself to one vendor or another. Extensive examples and chapter ending problems utilize several popular PLCs currently on the market highlighting understanding of fundamentals that can be used no matter the specific technology. Ladder programming is highlighted throughout with detailed coverage of design characteristics, development of functional blocks, instruction lists, and structured text. Methods for fault diagnosis, testing and debugging are also discussed. This edition has been enhanced with new material on I/Os, logic, and protocols and networking. For the UK audience only: This book is fully aligned with BTEC Higher National requirements. \*New material on combinational logic, sequential logic, I/Os, and protocols and networking \*More worked examples throughout with more chapter-ending problems \*As always, the book is vendor agnostic allowing for general concepts and fundamentals to be taught and applied to several controllers Newnes Programmable Logic Controllers (09-2009) (ATTiCA) 2 Copyright 2 Preface 3 Preface 3 Prerequisite Knowledge Assumed 4 Changes from the Fourth Edition 4 Aims 4 Structure of the Book 4 Acknowledgments 6 Chapter 1 - Programmable Logic Controllers 7 Programmable Logic Controllers 7 Controllers 7 Microprocessor-Controlled Systems 8 The Programmable Logic Controller 9 Hardware 10 Internal Architecture 11 The CPU 12 The Buses 13 Memory 13 Input/Output Unit 14 Sourcing and Sinking 16 PLC Systems 17 Programs 19 The IEC Standard 21 Programming PLCs 21 Summary 22 Problems 23 Lookup Tasks 25 Chapter 2 - Input- Output Devices 26 Input/Output Devices 26 Input Devices 26 Mechanical Switches 29 Proximity Switches 31 Photoelectric Sensors and Switches 32 Encoders 33 Temperature Sensors 35 Position/Displacement Sensors 39 Strain Gauges 40 Pressure Sensors 42 Liquid-Level Detectors 43 Fluid Flow Measurement 199 Smart Sensors 44 Output Devices 44 Relay 45 Directional Control Valves 45 Motors 49 Stepper Motors 50 Examples of Applications 54 A Conveyor Belt 54 A Lift 54 A Robot Control System 55 Liquid-Level Monitoring 55 Packages on Conveyor Belt Systems 55 Summary 56 Problems 58 Lookup Tasks 62 Chapter 3 - Digital Systems 63 Digital Systems 63 The Binary System 64 Octal and Hexadecimal 64 Octal System 65 Hexadecimal System 66 Binary Coded Decimals 66 Numbers in the Binary, Octal, Hex, and BCD Systems 67 Binary Arithmetic 68 Signed Numbers 69 One's and Two's Complements 69 Floating Point Numbers 70 PLC Data 71 Combinational Logic Systems 72 Sequential Logic Systems 73 Latches 99 Flip-Flops 75 Summary 75 Problems 77 Lookup Tasks 78 Chapter 4 - I- O Processing 79 I/O Processing 79 Input/Output Units 79 Input Units 79 Output Units 82 Signal Conditioning 85 Changing Voltage Levels 86 Op-Amp Comparator 88 Output Protection 89 Remote Connections 89 Serial and Parallel Communications 367 Serial Standards 91 Parallel Standards 94 Protocols 169 ASCII Codes 98 Networks 99 Distributed Systems 100 Network Standards 101 Examples of Commercial Systems 103 MAP 103 Ethernet 104 ControlNet 105 DeviceNet 105 Allen-Bradley Data Highway 105 Profibus 105 Factory-Floor Network 105 Processing Inputs 106 I/O Addresses 107 Summary 108 Problems 109 Lookup Tasks 113 Chapter 5 - Ladder and Functional Block Programming 114 Ladder and Functional Block Programming 114 Ladder Diagrams 114 PLC Ladder Programming 116 Logic Functions 119 And 119 Or 120 Not 122 Nand 123 Nor 124 Exclusive OR (XOR) 125 Latching 126 Multiple Outputs 126 Entering Programs 128 Ladder Symbols 129 Function Blocks 129 Logic Gates 129 Boolean Algebra 134 Program Examples 137 Location of Stop Switches 139 Summary 140 Problems 141 Lookup Tasks 149 Chapter 6 - IL, SFC, and ST Programming Methods 150 IL, SFC, and ST Programming Methods 150 Instruction Lists 150 Ladder Programs and Instruction Lists 152 Branch Codes 154 More Than One Rung 157 Programming Examples 158 Sequential Function Charts 159 Branching and Convergence 161 Actions 163 Structured Text 163 Conditional Statements 166 Iteration Statements 168 Structured Text Programs 169 Comparison with Ladder Programs 171 Summary 171 Problems 172 Chapter 7 - Internal Relays 183 Internal Relays 183 Internal Relays 183 Ladder Programs 184 Programs with Multiple Input Conditions 184 Latching Programs 186 Response Time 187 Battery-Backed Relays 188 One-Shot Operation 189 Set and Reset 190 Program Examples 194 Master Control Relay 195 Examples of Programs 199 Summary 200 Problems 202 Chapter 8 - Jump and Call 211 Jump and Call 211 Jump 211 Jumps Within Jumps 212 Subroutines 213 Function Boxes 214 Summary 217 Problems 217 Lookup Tasks 220 Chapter 9 - Timers 221 Timers 221 Types of Timers 221 On-Delay Timers 222 Sequencing 224 Cascaded Timers 224 On/Off Cycle Timer 226 Off-Delay Timers 227 Pulse Timers 374 Retentive Timers 230 Programming Examples 231 Summary 232 Problems 234 Lookup Tasks 240 Chapter 10 - Counters 241 Counters 241 Forms of Counter 241 Programming 241 Counter Application 245 Up- and Down-Counting 247 Timers with Counters 248 Sequencer 250 Summary 253 Problems 254 Lookup Tasks 261 Chapter 11 - Shift Registers 262 Shift Registers 262 Shift Registers 262 Ladder Programs 263 A Sequencing Application 265 Keeping Track of Items 265 Summary 267 Problems 343 Lookup Tasks 272 Chapter 12 - Data Handling 273 Data Handling 273 Registers and Bits 273 Data Handling 274 Data Movement 274 Data Comparison 276 Data Selection 277 Arithmetic Functions 278 Arithmetic Operations 278 Closed Loop Control 279 Modes of Control 280 Control with a PLC 282 Summary 283 Problems 283 Lookup Tasks 287 Chapter 13 - Designing Systems 288 Designing Systems 288 Program Development 288 Flowcharts and Pseudocode 64 Safe Systems 291 PLC Systems and Safety 293 Emergency Stop Relays 295 Safety Functions 296 Safety PLCs 297 Commissioning 297 Testing Inputs and Outputs 298 Testing Software 298 Simulation 299 Fault Finding 299 Fault Detection Techniques 301 Program Storage 305 System Documentation 306 Example of an Industrial Program 306 Summary 328 Problems 328 Lookup Tasks 331 Chapter 14 - Programs 332 Programs 332 Temperature Control 332 Valve Sequencing 184 Cyclic Movement 338 Sequencing 339 Sequencing Using a Sequential Function Chart 343 Car Park Barrier Operation Using Valves 343 Controlled Reset of Cylinders 347 Conveyor Belt Control 348 Bottle Packing 349 Control of a Process 355 Problems 357 Lookup Tasks 361 Appendix - Symbols 362 Appendix: Symbols 362 Ladder Programs 362 Function Blocks 363 Commonly Encountered Blocks 363 Logic Gates 364 Sequential Function Charts 365 Instruction List (IEC 1131-3 Symbols) 366 Structured Text 366 Operators 366 Conditional and Iteration Statements 367 Answers 368 Answers 368 Chapter 1 368 Chapter 2 368 Chapter 3 369 Chapter 4 370 Chapter 5 371 Chapter 6 372 Chapter 7 374 Chapter 8 375 Chapter 9 375 Chapter 10 376 Chapter 11 377 Chapter 12 378 Chapter 13 379 Chapter 14 382 Index 387 Index 387 A 387 B 388 C 388 D 389 E 390 F 390 G 390 H 390 I 390 J 391 L 391 M 392 N 393 O 393 P 394 Q 394 R 394 S 395 T 397 U 397 V 397 W 398 X 398 Z 398 A programmable logic controllers (PLC) is a real-time system optimized for use in severe conditions such as high/low temperatures or an environment with excessive electrical noise. This control technology is designed to have multiple interfaces (I/Os) to connect and control multiple mechatronic devices such as sensors and actuators.

Programmable Logic Controllers, Fifth Edition, continues to be a straight forward, easy-to-read book that presents the principles of PLCs while not tying itself to one vendor or another. Extensive examples and chapter ending problems utilize several popular PLCs currently on the market highlighting understanding of fundamentals that can be used no matter the specific technology. Ladder programming is highlighted throughout with detailed coverage of design characteristics, development of functional blocks, instruction lists, and structured text. Methods for fault diagnosis, testing and debugging are also discussed. This edition has been enhanced with new material on I/Os, logic, and protocols and networking.

For the UK audience only: This book is fully aligned with BTEC Higher National requirements.


*New material on combinational logic, sequential logic, I/Os, and protocols and networking
*More worked examples throughout with more chapter-ending problems
*As always, the book is vendor agnostic allowing for general concepts and fundamentals to be taught and applied to several controllers
Programmable Logic Controllers. Fifth Edition КНИГИ ; ПРОГРАММИНГ Название: Programmable Logic Controllers Автор: W.BoltonИздательство: Newnes Год: 2009 Страниц: 398 ISBN: 978-1-85617-751-1 Формат: PDF Размер: 10.4 Mб Язык: английскийA programmable logic controllers (PLC) is a real-time system optimized for use in severe conditions such as high/low temperatures or an environment with excessive electrical noise. This control technology is designed to have multiple interfaces (I/Os) to connect and control multiple mechatronic devices such as sensors and actuators. Programmable Logic Controllers, Fifth Edition, continues to be a straight forward, easy-to-read book that presents the principles of PLCs while not tying itself to one vendor or another. Extensive examples and chapter ending problems utilize several popular PLCs currently on the market highlighting understanding of fundamentals that can be used no matter the specific technology. Ladder programming is highlighted throughout with detailed coverage of design characteristics, development of functional blocks, instruction lists, and structured text. Methods for fault diagnosis, testing and debugging are also discussed. This edition has been enhanced with new material onturbobit.net uploading.com sharingmatrix.com.com 0 1 2 3 4 5 Rapid technological advances have made the PLC (programmable logic controller) an important part of many industries, from petrochemicals to food production. This fourth edition provides students with an accessible introduction to the subject