Technician’s Guide to Programmable Controllers
, by Cox, Richard A.- ISBN: 9781401890070 | 1401890075
- Cover: Paperback
- Copyright: 5/16/2006
Preface | p. x |
What is a Programmable Logic Controller (PLC)? | p. 1 |
Chapter Summary | p. 9 |
Review Questions | p. 9 |
Understanding the Input/Output (I/O) Section | p. 10 |
I/O Section | p. 10 |
Fixed I/O | p. 11 |
Modular I/O | p. 12 |
Discrete I/O Modules | p. 15 |
Discrete Input Module | p. 15 |
AC Discrete Input Module | p. 16 |
DC Discrete Input Module | p. 20 |
Fast-Responding DC Input Modules | p. 21 |
Discrete Output Modules | p. 22 |
AC Output Module | p. 23 |
Output Fuses | p. 25 |
Status Lights | p. 26 |
Module Keying | p. 27 |
DC Output Modules | p. 28 |
Sourcing and Sinking | p. 29 |
Contact Output Modules | p. 31 |
Interposing Relay | p. 31 |
Reed Relay Output Module | p. 31 |
Transistor-Transistor Logic (TTL) I/O Modules | p. 31 |
Analog I/O Modules | p. 32 |
Safety Circuit | p. 34 |
Rack Installation | p. 35 |
Electrical Noise (Surge Suppression) | p. 37 |
Grounding | p. 39 |
I/O Shielding | p. 40 |
Chapter Summary | p. 42 |
Review Questions | p. 43 |
Processor Unit | p. 45 |
The Processor | p. 46 |
Memory Types | p. 50 |
Memory Size | p. 53 |
Guarding Against Electrostatic Discharge (ESD) | p. 53 |
Memory Structure | p. 55 |
Peripherals | p. 56 |
Chapter Summary | p. 57 |
Review Questions | p. 57 |
Programming Devices (Programmers) | p. 59 |
Programming Devices | p. 59 |
Hand-Held Programmers | p. 60 |
Computer Programmers | p. 60 |
Hand-Held Programmers | p. 64 |
Advantages | p. 64 |
Disadvantages | p. 64 |
Personal Computer Programmers | p. 64 |
Advantages | p. 64 |
Disadvantages | p. 64 |
Chapter Summary | p. 64 |
Review Questions | p. 65 |
Memory Organization | p. 66 |
Memory Words and Word Locations | p. 66 |
SLC 500 and MicroLogix 1000 and 1500 Addressing Scheme | p. 72 |
Modicon 984 Addressing Scheme | p. 80 |
Memory Organization | p. 81 |
Storage Memory | p. 81 |
User Memory | p. 82 |
Allen-Bradley PLC-5 File Structure | p. 83 |
SLC 500 and MicroLogix File Structure | p. 85 |
Chapter Summary | p. 90 |
Review Questions | p. 90 |
Numbering Systems | p. 91 |
Decimal System | p. 91 |
Binary System | p. 93 |
2s Complement | p. 94 |
Octal System | p. 103 |
Hexadecimal System | p. 105 |
BCD System | p. 108 |
Using Numbering Systems | p. 109 |
Chapter Summary | p. 111 |
Review Questions | p. 112 |
Understanding and Using Ladder Diagrams | p. 114 |
Wiring Diagrams | p. 114 |
Ladder Diagrams | p. 115 |
Ladder Diagram Rules | p. 116 |
Basic STOP/START Circuit | p. 118 |
Sequenced Motor Starting | p. 120 |
Digital Logic Gates | p. 121 |
Chapter Summary | p. 129 |
Review Questions | p. 129 |
Relay Type Instructions | p. 132 |
Programming Contacts | p. 133 |
Examine On | p. 136 |
Examine Off | p. 137 |
Clarifying Examine On and Examine Off | p. 143 |
Chapter Summary | p. 147 |
Review Questions | p. 147 |
Programming a PLC | p. 149 |
Programming with a Computer | p. 150 |
Programming Using Mnemonic Strings | p. 170 |
Peripherals | p. 174 |
Chapter Summary | p. 175 |
Review Questions | p. 175 |
Programming Considerations | p. 176 |
Network Limitations | p. 176 |
Programming Restrictions | p. 179 |
Program Scanning | p. 182 |
Programming Stop Buttons | p. 186 |
Logical Holding Instructions | p. 187 |
Discrete Holding Contacts | p. 187 |
Overload Contacts | p. 187 |
Chapter Summary | p. 191 |
Review Questions | p. 191 |
Program Control Instructions | p. 193 |
Master Control Relay Instructions | p. 193 |
Allen-Bradley PLC-5, SLC 500, and MicroLogix MCR Instruction | p. 194 |
Latching Relay Instructions | p. 195 |
Safety Circuit | p. 198 |
Immediate Input Instruction | p. 199 |
Immediate Output Instruction | p. 200 |
Jump and Label Instructions | p. 201 |
Jump to Subroutine, Subroutine, and Return Instructions | p. 202 |
Temporary End Instruction | p. 202 |
Always False Instruction | p. 203 |
One-Shot Instruction | p. 203 |
Chapter Summary | p. 204 |
Review Questions | p. 204 |
Programming Timers | p. 206 |
Pneumatic Timers (General) | p. 206 |
Allen-Bradley PLC-5, SLC 500, and MicroLogix Timers | p. 212 |
Modicon Inc. Timers | p. 218 |
Cascading Timers | p. 221 |
Chapter Summary | p. 222 |
Review Questions | p. 222 |
Programming Counters | p. 224 |
Allen-Bradley PLC-5, SLC 500, and MicroLogix Counters | p. 224 |
Modicon 984 Counters | p. 230 |
Combining Timers and Counters | p. 232 |
Chapter Summary | p. 233 |
Review Questions | p. 234 |
Data Manipulation | p. 236 |
Data Transfer | p. 236 |
Allen-Bradley PLC-5, SLC 500, and MicroLogix Data Transfer Instructions | p. 237 |
Modicon PLC | p. 241 |
Data Compare | p. 241 |
Allen-Bradley PLC-5, SLC 500, and MicroLogix Data Compare Instructions | p. 242 |
Chapter Summary | p. 251 |
Review Questions | p. 252 |
Math Functions | p. 253 |
Using Math Functions | p. 253 |
Allen-Bradley PLC-5, SLC 500, and MicroLogix Math Instructions | p. 253 |
Combining Math Functions | p. 258 |
Gould 984 Arithmetic (Math) Instruction | p. 260 |
Chapter Summary | p. 264 |
Review Questions | p. 264 |
Word and File Moves | p. 265 |
Words | p. 265 |
Synchronous Shift Register | p. 265 |
Allen-Bradley PLC-5, SLC 500, and MicroLogix Bit Shift Instructions | p. 267 |
File Moves | p. 272 |
Word-to-File Instruction | p. 272 |
File-to-Word Instruction | p. 273 |
File-to-File Instruction | p. 274 |
Allen-Bradley PLC-5, SLC 500, and MicroLogix File Copy Instruction | p. 275 |
Gould Data Transfer Instructions | p. 276 |
Asynchronous Shift Register (FIFO) | p. 280 |
Allen-Bradley PLC-5, SLC 500, and MicroLogix FIFO Instruction | p. 281 |
Last-In First-Out (LIFO) Instructions | p. 283 |
Gould First In Function Block | p. 284 |
Chapter Summary | p. 286 |
Review Questions | p. 286 |
Sequencers | p. 288 |
Masks | p. 291 |
Allen-Bradley PLC-5, SLC 500, and MicroLogix 1000 Sequencer Instruction | p. 292 |
Chapter Summary | p. 297 |
Review Questions | p. 297 |
Process Control Signals, Scaling, and PID Instructions | p. 299 |
Process Control Signals and Scaling | p. 299 |
Allen-Bradley SLC 500 Scale (SCL) Instruction | p. 308 |
Allen-Bradley SLC 500 Scale with Parameters (SCP) Instruction | p. 310 |
Allen-Bradley SLC 500 PID Instruction | p. 312 |
PID Tuning Parameters | p. 318 |
PID Input Parameters | p. 321 |
PID Output Parameters | p. 321 |
PID Status & Control Flags | p. 322 |
PID Program Example | p. 323 |
PID Loop Tuning | p. 331 |
Loop Tuning Techniques | p. 332 |
Chapter Summary | p. 339 |
Review Questions | p. 339 |
Programming with Boolean | p. 341 |
Boolean Algebra | p. 341 |
Programming in Boolean | p. 345 |
Terms | p. 354 |
Chapter Summary | p. 355 |
Review Questions | p. 355 |
Understanding Communication Networks | p. 358 |
History | p. 358 |
Networking Principles | p. 359 |
Network Categories | p. 360 |
Network Configurations | p. 362 |
Network Media | p. 364 |
Twisted-Pair Cable | p. 365 |
Coaxial Cable | p. 367 |
Fiber Optic Cable | p. 369 |
Reducing Electromagnetic Interference | p. 371 |
Network Addressing | p. 372 |
Network Access Methods (Access Protocols) | p. 374 |
Network Protocols | p. 375 |
Network Messages | p. 376 |
Network Communication Instructions | p. 379 |
Industrial Communication Networks | p. 380 |
I/O and Device Networks | p. 380 |
Control Networks | p. 382 |
Information Networks | p. 383 |
Industrial Protocols | p. 383 |
DeviceNet | p. 383 |
Foundation Fieldbus | p. 383 |
Profibus | p. 386 |
Modbus Plus | p. 386 |
Data Highway Plus | p. 386 |
ControlNet | p. 386 |
Ethernet | p. 387 |
Chapter Summary | p. 391 |
Review Questions | p. 392 |
Start Up and Troubleshooting | p. 393 |
Start Up | p. 393 |
Testing Inputs | p. 395 |
Testing Outputs | p. 396 |
Final System Checkout | p. 398 |
Troubleshooting | p. 399 |
Chapter Summary | p. 404 |
Review Questions | p. 404 |
PLC Programming Examples | p. 405 |
Push ON/Push OFF Circuit | p. 406 |
1/2 Second Pilot Light Flasher Circuit | p. 407 |
Motor Starter Fault Monitoring Logic | p. 408 |
Three-Wire Motor Control Logic with Fault Monitoring, Pilot Light, and Flasher Circuit | p. 410 |
Time-Based Events | p. 410 |
Analog Signal Filter Algorithm | p. 413 |
Parts Conveyor Tracking Logic | p. 416 |
Tracking Example One | p. 416 |
Tracking Example Two | p. 420 |
Chapter Summary | p. 423 |
Review Questions | p. 423 |
Glossary | p. 425 |
Index | p. 441 |
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