Programmable Logic Controllers : Hardware and Programming

by Rabiee, Max

• ISBN13: 9781566378758
• ISBN10: 1566378753
• Edition: 1st
• Copyright: 2002-01-01
• Publisher: GOODHEART WILCOX COMPANY

Table of Contents

Programmable Logic Controller (PLC) Overview	p. 11
Introduction	p. 11
PLC History and Development	p. 12
PLC Block Diagram	p. 12
Central Processing Unit	p. 13
Memory Devices	p. 16
Address Decoder Circuit	p. 18
Peripheral Chips	p. 18
Discrete Input Modules	p. 19
Discrete Output Modules	p. 19
Analog Input/Output Modules	p. 20
PLC Power Supply	p. 20
Summary	p. 20
Glossary of Terms	p. 21
Review Questions	p. 23
PLC and Control System Components	p. 25
Introduction	p. 25
PLC Communication Systems	p. 26
PLC Memory Maps	p. 29
PLC Terminology and Principles	p. 29
PLC Selection and Installation	p. 31
PLC Input/Output Connections	p. 32
Electromechanical Terms and Descriptions	p. 33
Electric Motors	p. 36
DC Motor Classification and Characteristics	p. 36
AC Motor Classification and Characteristics	p. 39
Summary	p. 41
Glossary of Terms	p. 41
Review Questions	p. 44
Number Systems and Codes	p. 45
Introduction	p. 46
Decimal Number System	p. 46
Binary Number System	p. 47
Binary-to-Decimal Conversion	p. 47
Decimal-to-Binary Conversion	p. 48
Binary Addition	p. 49
Binary Subtraction	p. 50
Binary Multiplication	p. 51
Binary Division	p. 51
Hexadecimal Number System	p. 52
Octal Number System	p. 53
Binary Coded Decimal System	p. 54
Gray Code	p. 55
Alphanumeric Code	p. 55
Summary	p. 57
Glossary of Terms	p. 57
Review Questions	p. 58
Creating Relay Logic Diagrams	p. 61
Introduction	p. 61
Relay Logic Diagrams	p. 61
Discrete Input Devices	p. 62
Normally Open and Normally Closed Input Devices	p. 63
Discrete Output Devices	p. 64
Relay Coils and Contacts	p. 66
Rules for Drawing Relay Logic Diagrams	p. 67
Creating Relay Logic Diagrams for Industrial Control Circuits	p. 73
Summary	p. 76
Glossary of Terms	p. 77
Review Questions	p. 78
PLC Programming	p. 81
Introduction	p. 81
Creating PLC Ladder Logic Diagrams from Relay Logic Diagrams	p. 82
Programming Ladder Logic Diagrams with Normally Open and Normally Closed Switches	p. 85
Programming Ladder Logic Diagrams with Normally Open and Normally Closed Contacts	p. 88
PLC Program Scan Time	p. 89
PLC Program and Data Files	p. 92
Programming Ladder Logic Diagrams with Latch/Unlatch	p. 94
Loading and Troubleshooting PLC Ladder Diagrams in Run Mode	p. 95
Using PLC Force Function for Troubleshooting	p. 98
Creating and Printing PLC Program Reports	p. 102
Using Utility Functions to Save and Retrieve PLC Programs	p. 105
Summary	p. 107
Glossary of Terms	p. 108
Review Questions	p. 109
Programming Logic Gate Functions in PLCs	p. 111
Introduction	p. 111
Combinational and Sequential Logic Gate Circuits	p. 112
Boolean Expressions, Truth Tables, and Logic Gate Circuits	p. 112
NOT Gates or Inverters	p. 114
AND Gates	p. 115
OR Gates	p. 115
NAND Gates	p. 117
NOR Gates	p. 119
XOR (Exclusive OR) Gates	p. 121
XNOR (Exclusive NOR) Gates	p. 122
Simplifying Boolean Expressions	p. 124
Creating PLC Ladder Logic Diagrams from Logic Gate Circuits	p. 127
Creating PLC Ladder Logic Diagrams from Boolean Expressions	p. 130
Creating Logic Circuits from PLC Ladder Logic Diagrams	p. 132
Summary	p. 136
Glossary of Terms	p. 136
Review Questions	p. 137
PLC Timer Functions	p. 141
Introduction	p. 141
Timer Functions	p. 142
PLC Timer Function Registers	p. 145
Fixed Preset Value Nonretentive Timer ON-Delay Functions	p. 146
Variable Preset Value Nonretentive Timer ON-Delay Functions	p. 147
Retentive Timer ON-Delay Functions	p. 149
Timer OFF-Delay Functions	p. 151
Interlocking Timers	p. 152
Cascading Timers to Increase the Timing Value	p. 153
Summary	p. 154
Glossary of Terms	p. 155
Review Questions	p. 156
PLC Counter Functions	p. 157
Introduction	p. 157
PLC Counter Functions	p. 157
PLC Counter Function Registers	p. 158
PLC Count Up Functions	p. 159
PLC Count Down Functions	p. 160
Connecting PLC Counter Functions	p. 162
Cascading Counters	p. 163
Creating PLC Ladder Logic Diagrams with Counters and Timers	p. 166
Summary	p. 166
Glossary of Terms	p. 166
Review Questions	p. 168
PLC Math Functions	p. 169
Introduction	p. 169
Addition	p. 169
Subtraction	p. 170
Multiplication	p. 173
Division	p. 175
Summary	p. 176
Glossary of Terms	p. 176
Review Questions	p. 178
PLC Logic Functions	p. 179
Introduction	p. 179
Logic Gate Functions	p. 180
Shift Left Function	p. 183
Shift Right Function	p. 186
Summary	p. 188
Glossary of Terms	p. 189
Review Questions	p. 189
PLC Compare, Jump, and MCR Functions	p. 191
Introduction	p. 191
Compare Functions	p. 192
Unconditional Jump	p. 196
Conditional Jump	p. 197
Master Control Reset (MCR)	p. 197
Summary	p. 199
Glossary of Terms	p. 199
Review Questions	p. 200
PLC Subroutine Functions	p. 201
Introduction	p. 201
Subroutine Concept	p. 202
Jump to Subroutine	p. 203
Return from Subroutine	p. 204
Subroutine Applications	p. 206
Summary	p. 207
Glossary of Terms	p. 209
Review Questions	p. 210
Sequencer Functions	p. 211
Introduction	p. 211
Sequencer Concept	p. 212
Sequencer Output Function	p. 214
Sequencer Compare Function	p. 219
Sequencer Load Function	p. 221
Cascading Sequencers	p. 221
Paralleling Sequencers	p. 223
Summary	p. 225
Glossary of Terms	p. 226
Review Questions	p. 227
PLC Networks in Manufacturing	p. 229
Introduction	p. 229
Local Area Networks in Industry	p. 230
Network Communication Channeling	p. 230
Transmission Media	p. 231
Network Connection Topologies	p. 232
Network Access Control Schemes	p. 233
PLC Network Hardware	p. 234
PLC Network Software	p. 235
Summary	p. 238
Glossary of Terms	p. 238
Review Questions	p. 239
Troubleshooting and Servicing the PLC System	p. 241
Introduction	p. 241
Routine Maintenance	p. 242
Hardware	p. 243
Wiring Connections	p. 246
Software Error Detection	p. 247
Summary	p. 249
Glossary of Terms	p. 252
Review Questions	p. 252
Appendices	p. 253
Appendix A	p. 253
Appendix B	p. 259
Appendix C	p. 260
Glossary	p. 261
Index	p. 275
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