Rockwell Automation 1785 PLC-5 User Manual Page 69
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1 Publication 1785-UM012D-EN-P - July 2005
Chapter
5
Communicating with Controller-Resident I/O
Using This Chapter
This chapter explains how to configure the controller to communicate with
resident I/O:
1. Set the I/O chassis switch for the addressing mode.
2. Set the rack address.
The rack address defaults to 0. If you want to change the rack address
to 1, set bit S:26/2.
Introduction to PLC-5
Controller Scanning
The basic function of a programmable-controller system is to:
For Information About Go to Page
Introduction to PLC-5 controller scanning 5-1
Program scanning 5-2
Transferring data to controller-resident I/O 5-3
Configuring the system for controller-resident I/O 5-4
a.
b.
c.
make decisions via a control program
like ladder logic based on the status of
those devices
read the status of various input devices
(such as pushbuttons and limit switches)
set the status of output devices
(such as lights, motors, and
heating coils)
- Enhanced and 1
- Ethernet PLC-5 1
- Programmable 1
- Controllers 1
- Important User Information 2
- Summary of Changes 3
- Summary of Changes 2 4
- Table of Contents 5
- Table of Contents 2 6
- Table of Contents 3 7
- Table of Contents 4 8
- Chapter 12 9
- Chapter 13 9
- Chapter 14 10
- Preparing Power-Up Routines 10
- Chapter 15 10
- Preparing Fault Routines 10
- Table of Contents 7 11
- Appendix C 12
- Maximizing System Performance 12
- Appendix D 12
- Appendix E 13
- Switch Setting Reference 13
- Appendix F 13
- Troubleshooting 13
- Appendix G 14
- Cable Reference 14
- Using This Manual 15
- Terms Used in This Manual 16
- Manual Overview 17
- Preface 4 18
- Lay Out the System 19
- Identifying Controller 20
- Components 20
- PLC-5/11 Controller 21
- PLC-5/20 or -5/26 Controller 21
- PLC-5/20E 24
- Controller 24
- PLC-5/40E 25
- PROG (program) 27
- REM (remote) 27
- Programming Features 28
- Using a Controller Channel 29
- Using a PLC-5/40L, -5/60L 32
- Programmable Controller 32
- Selecting and Placing I/O 33
- Selecting I/O Module 34
- Placing I/O Modules in a 35
- Placing System Hardware 37
- Protecting Your Controller 39
- Preventing Electrostatic 39
- Discharge 39
- Laying Out Your Cable 40
- Laying Out Your 41
- Backpanel Spacing 41
- Grounding Your System 42
- I/O Addressing Concept 45
- I:014/12 46
- Choosing an Addressing 47
- 18-and 16-point Example 48
- 32-point Example 49
- Addressing 51
- Block-Transfer Modules 51
- Addressing Summary 51
- Assigning Racks 52
- Understanding PLC-5 54
- Controller Memory 54
- • data blocks within a file 56
- • modules in an I/O chassis 56
- Addressing File Types 57
- Specifying Logical Addresses 61
- Specifying Indirect Addresses 62
- Specifying Indexed Addresses 64
- Specifying Symbolic Addresses 65
- Effectively Using 68
- I/O Memory 68
- Program scanning 5-2 69
- Program Scanning 70
- Transferring Data to 71
- Controller-Resident I/O 71
- Configuring the System 72
- Communicating with Remote I/O 73
- Introduction to Remote I/O 75
- Designing a Remote I/O 76
- Cable Design Guidelines 77
- Configuring a Controller 78
- Channel as a Scanner 78
- Define an I/O Status File 79
- Specify the Scan List 81
- Communicating to a 83
- Remote I/O Node Adapter 83
- Block-Transfers of 87
- Remote I/O Data 87
- AdapterAdapter 88
- Block-Transfer Sequence 89
- Block-Transfer 91
- Programming 91
- Scanner Channels 93
- Monitoring messages 95
- Addressing the I/O 96
- Status File 96
- Not Used 97
- Fault BitsPresent Bits 97
- Communicating with a PLC-5 99
- Adapter Channel 99
- Communication to a 100
- PLC-5 Adapter Channel 100
- Configuring 100
- Address, and Rack Size 101
- IMPORTANT 104
- Data Monitor screen 110
- PLC-5 Supervisory Controller 112
- Monitoring Remote I/O 117
- Adapter Channels 117
- Using This Chapter 119
- Selecting Devices That You 119
- Can Connect 119
- Addressing and Placing I/O 120
- Remote I/O racks 121
- Transferring Data 122
- Discrete Data Transfer 123
- Transferring Block Data 124
- Configuring the Controller 127
- Monitoring Extended-Local 130
- I/O Status 130
- Selecting Devices That 133
- You Can Connect 133
- Link Design 134
- Configuring the Channel 135
- [Enter] 136
- Using the Global Status 137
- Flag File 137
- Monitoring DH+ 139
- Communication Channels 139
- Monitoring General Status 143
- Estimating DH+ Link 144
- Performance 144
- Size and Number of Messages 145
- Message Destination 146
- Internal Processing Time 147
- Application Guidelines 149
- Choosing Between 151
- RS-232C, RS-422A, and 151
- Serial Port 152
- Using Channel 0 152
- Changing Modes 155
- Configuring Channel 0 156
- Monitoring Channel 0 172
- Media and Cabling 175
- Assigning Your IP Address 176
- Network Addressing 176
- Configuring Channel 2 for 176
- Ethernet Communication 176
- No. Enter further 177
- See page 11-12 179
- BOOTP Enable 180
- BOOTP response not 180
- 1 = 10MB Ethernet 182
- Using Advanced 183
- Ethernet Functions 183
- No Gateway 186
- Using Domain Name 189
- Using the Embedded Web 190
- HTML Pages 196
- Using Multihop Messaging 203
- Multihop Examples 204
- Communicating with 206
- ControlLogix Devices 206
- Interpreting Error Codes 207
- Interpreting Ethernet Status 208
- Monitoring Ethernet commands 210
- Monitoring Ethernet replies 210
- Considerations 211
- PLC-5 Controller 212
- Protecting Your Programs 213
- Privileges 214
- About Passwords and 214
- Defining Privilege Classes 215
- Assigning a Privilege Class 216
- Assigning Read/Write 217
- Privileges to a Program File 217
- Privileges to a Data File 217
- Programming Considerations 219
- Extended Forcing 220
- BTW instruction execution 221
- BTR instruction execution 221
- Increased Program Scan Time 222
- I/O Force Privileges 222
- Setting Up and Using 223
- Using Special 228
- Programming Routines 228
- Priority Scheduling for 229
- Interrupts and MCPs 229
- Program Execution States 230
- Rescheduling Operation 231
- Defining and Programming 233
- Interrupt Routines 233
- Allowing or Inhibiting 236
- Defining a Controller 236
- Power-Up Procedure 236
- Understanding 240
- Controller-Detected Major 240
- Fault in a Remote I/O Chassis 241
- Defining a Fault Routine 242
- Defining a Watchdog Timer 243
- Programming a Fault 244
- Setting an Alarm 245
- Clearing a Major Fault 245
- I/O rack fault 248
- Monitoring Faults 249
- Interpreting Major Faults 250
- Interpreting Minor Faults 250
- Monitoring Status Bits 251
- Using Main Control Programs 253
- Understanding How the 254
- Controller Interprets MCPs 254
- Configuring MCPs 255
- Monitoring MCPs 257
- Using a Selectable Timed 259
- Interrupt 259
- STI Application Example 260
- Defining a Selectable 261
- Timed Interrupt 261
- Monitoring Selectable 262
- Timed Interrupts 262
- Using a Processor Input 263
- Writing PII Ladder Logic 264
- PII Application Examples 264
- Design Considerations 266
- Input Interrupt 267
- Monitoring Controller 268
- Input Interrupts 268
- System Specifications 269
- Memory Backup Devices 272
- Processor Status File 275
- • S:7/8-15 unused 277
- S:13-S:24 283
- S:26-S:35 284
- S:36-S:78 285
- S:79-S:127 286
- Effects of Housekeeping Time 290
- Input and Output Modules 292
- I/O Backplane Transfer 292
- Remote I/O Scan Time 292
- Communication Rate 293
- Number of Rack Entries 293
- Block-Transfers 294
- BT BT BT 296
- Controller Time 297
- Example Calculation 298
- Performance Effects of 298
- Online Operations 298
- Effect of Inserting 299
- Ladder Rungs at the 299
- 56K-word Limit 299
- Using Program Control 300
- Instructions 300
- Appendix 301
- Relay Instructions 302
- Timer Instructions 303
- Counter Instructions 304
- Compare Instructions 305
- Compute Instructions 307
- Logical Instructions 314
- Conversion Instructions 315
- File Instructions 317
- Diagnostic Instructions 319
- Shift Register Instructions 320
- Sequencer Instructions 321
- Program Control Instructions 322
- Block Transfer Instructions 325
- ASCII Instructions 327
- Bit and Word Instructions 330
- L = number of FOR/NXT loops 334
- Controller Switches 340
- Switch 2 341
- I/O Chassis Backplane 342
- Extended-Local I/O Adapter 343
- ATTENTION 344
- Remote I/O Adapter Module 345
- Extended-Local I/O 347
- Adapter Module 347
- (1771-ALX) Configuration Plug 348
- Troubleshooting F-3 351
- Ethernet Status Indicator 353
- Remote I/O System 354
- Adapter Module (continued) 356
- ADAPTER 357
- I/O RACK 357
- Unexpected Operation 358
- Suggested Action 359
- F-12 Troubleshooting 360
- Serial Cable Pin 362
- Assignments 362
- Connecting Diagrams 363
- 25-Pin Serial Port 364
- Workstation 364
- Programming Cable 365
- Specifications 365
- Cable - 1784-CP6 366
- -CP5, or -PCM5 cable 366
- Cable - 1784-CP10 367
- Cable - 1784-CP11 368
- Cable - 1784-PCM5 368
- Ethernet Cable Connections 369
- G-10 Cable Reference 370
- Numerics 371
- 2 Index 372
- Index 3 373
- 4 Index 374
- Index 5 375
- 6 Index 376
- Index 7 377
- 8 Index 378
- Index 9 379
- 10 Index 380
- Index 11 381
- 12 Index 382
- How Are We Doing? 383
- BUSINESS REPLY MAIL 384
- Rockwell Automation 388
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