Page 8 - Programmable Logic Controllers, Fifth Edition Mobile 2
P. 8

Chapter 13  PLC Installation Practices,
                                Editing, and Troubleshooting     281            Routines ............................ 337
                                                                                Tags................................ 337
                                                                                Structures ........................... 340
                   13.1   PLC Enclosures....................... 282             Creating Tags ........................ 341
                   13.2   Electrical Noise....................... 284           Monitoring and Editing Tags ............ 342
                   13.3   Leaky Inputs and Outputs............... 285           Array............................... 342
                   13.4   Grounding........................... 285              Review Questions ..................... 344
                   13.5   Voltage Variations and Surges............ 287  Part 2  Bit-Level Programming ............... 345
                   13.6   Program Editing and Commissioning...... 288           Program Scan ........................ 345
                   13.7   Programming and Monitoring ........... 289            Creating Ladder Logic ................. 346
                   13.8   Preventive Maintenance ................ 291           Tag-Based Addressing ................. 347
                   13.9   Troubleshooting ...................... 292            Adding Ladder Logic to the Main Routine.. 348
                          Processor Module ..................... 292            Internal Relay Instructions .............. 350
                          Input Malfunctions .................... 292           Latch and Unlatch Instructions........... 352
                          Output Malfunctions ................... 294           One-Shot Instruction................... 353
                          Ladder Logic Program ................. 294            Review Questions ..................... 356
                   13.10  PLC Programming Software............. 299             Problems ............................ 356
                   Review Questions............................ 302      Part 3  Programming Timers ................. 358
                   Problems .................................. 302
                                                                                Timer Predefined Structure.............. 358
                                                                                On-Delay Timer (TON) ................ 359
                   Chapter 14  Process Control, Network
                                Systems, and SCADA               305            Off-Delay Timer (TOF) ................ 362
                                                                                Retentive Timer On (RTO) .............. 364
                   14.1   Types of Processes .................... 306           Cascading of Timers ................... 365
                   14.2   Structure of Control Systems ............ 308         Review Questions ..................... 367
                   14.3   On/Off Control ....................... 310            Problems ............................ 367
                   14.4   PID Control.......................... 311      Part 4  Programming Counters ............... 368
                   14.5   Motion Control ....................... 315            Counters ............................ 368
                   14.6   Data Communications.................. 316             Count-Up (CTU) Counter............... 369
                          Data Highway........................ 322              Count-Down (CTD) Counter ............ 371
                          Serial Communication ................. 322            Combining Counter and Timer Functions .. 372
                          DeviceNet ........................... 322             Review Questions ..................... 373
                          ControlNet........................... 325             Problems ............................ 373
                          EtherNet/IP.......................... 325      Part 5  Math, Comparison,
                          Modbus ............................. 326              and Move Instructions ................ 374
                          Fieldbus............................. 326             Math Instructions ..................... 374
                          PROFIBUS-DP....................... 326                Comparison Instructions................ 376
                   14.7   Supervisory Control                                   Move Instructions ..................... 379
                          and Data Acquisition (SCADA) .......... 328           Combining Math, Comparison,
                   Review Questions............................ 331             and Move Instructions.................. 380
                   Problems .................................. 332              Review Questions ..................... 383
                                                                                Problems ............................ 383
                   Chapter 15  ControlLogix Controllers          333     Part 6  Function Block Programming .......... 384
                                                                                Function Block Diagram (FBD) .......... 384
                   Part 1  Memory and Project Organization ...... 334           FBD Programming .................... 388
                          Memory Layout ...................... 334              Review Questions ..................... 394
                          Configuration ........................ 334            Problems ............................ 394
                          Project.............................. 335
                          Tasks ............................... 336      Glossary ................................... 395
                          Programs............................ 336       Index ..................................... 407









                                                                                                          Contents        vii







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