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1 Publication 1785-UM012D-EN-P - July 2005

Chapter

Communicating with Extended-Local I/O

Using This Chapter

This chapter explains how to configure the controller to communicate with

extended-local I/O:

1. Configure channel 2 for extended-local I/O.

2. Define a diagnostic file.

3. Use a unique, unused integer file.

4. Define the scan list.

Selecting Devices That You

Can Connect

The only products that can form the extended-local I/O link are the

PLC-5/40L and -5/60L controllers and the extended-local I/O

adapter module.

For Information About Go to Page

Selecting devices that you can connect 8-1

Cabling 8-2

Addressing and placing I/O 8-2

Transferring data 8-4

Configuring the controller as an extended-local I/O

scanner

8-9

Monitoring extended-local I/O status 8-12

1771-ALX, extended-local I/O adapter modulePLC-5/40L and -5/60L processor

Extended-local I/O link

The extended-local I/O processor cannot

be an extended-local I/O adapter.

Default Chapter3
- Summary of Changes3
- Table of Contents5
- Purpose of this Manual15
- Related PLC-5 Documentation15
- Terms Used in this Manual16
- Manual Overview17
Chapter 119
- Using this Chapter19
- Lay out the System19
- Identifying Controller Components20
  - PLC-5/11, -5/20, and -5/26 Controller Front Panels21
  - Controller Front Panel22
- Programming Features28
- Using a Controller Channel as a Remote I/O Scanner29
Appendix C Program Scan29
- Using a Controller Channel as a Remote I/O Adapter30
- Using a PLC-5/40L, -5/60L Programmable Controller as an Extended-Local I/O Scanner32
Chapter 2 Using this Chapter33
- Selecting I/O Modules33
  - Guidelines for Selecting I/O Modules34
- Selecting I/O Module Density34
- Placing I/O Modules in a Chassis35
- Using this Chapter37
Chapter 337
- Determining the Proper Environment37
- Protecting Your Controller39
- Preventing Electrostatic Discharge39
- Laying out Your Cable Raceway40
  - Categorize Conductors40
  - Route Conductors40
- Laying out Your Backpanel Spacing41
  - Chassis Dimensions (Series B)41
  - I/O Chassis and External Power Supply Dimensions42
- Grounding Your System42
- Using this Chapter45
Chapter 445
- I/O Addressing Concept45
- Choosing an Addressing Mode47
- Addressing Block-Transfer Modules51
- Addressing Summary51
- Assigning Racks52
- Understanding PLC-5 Controller Memory54
- Addressing60
- Effectively Using I/O Memory68
Chapter 569
- Using this Chapter69
- Introduction to PLC-5 Controller Scanning69
- Program Scanning70
- Transferring Data to Controller-Resident I/O71
- Configuring the System for Controller-Resident I/O72
- Using this Chapter73
Chapter 674
- Selecting Devices that You Can Connect74
- Introduction to Remote I/O75
- Designing a Remote I/O Link76
- Configuring a Controller Channel as a Scanner78
- Communicating to a Remote I/O Node Adapter83
  - Troubleshooting Remote I/O Communication Difficulties84
- Transferring Block Data85
- Block-Transfers of Remote I/O Data87
- Block-Transfer Sequence with Status Bits89
- Block-Transfer Programming Considerations91
  - General Considerations91
  - For Controller-Resident Local Racks92
- Monitoring Remote I/O Scanner Channels93
  - Monitoring Transmission Retries93
- Addressing the I/O Status File96
Chapter 7 Using this Chapter99
- Configuring Communication to a PLC-5 Adapter Channel99
- Programming Discrete Transfers in Adapter Mode108
- Programming Block-Transfers of Data to an Adapter Channel108
- Monitoring Remote I/O Adapter Channels117
Chapter 8 Using this Chapter119
- Selecting Devices that You Can Connect119
- Cabling120
- Addressing and Placing I/O120
- Transferring Data122
- Configuring the Controller as an Extended-Local I/O Scanner127
- Monitoring Extended-Local I/O Status130
Chapter 9 Using this Chapter133
- Selecting Devices that You Can Connect133
- Link Design134
- Configuring the Channel for DH+ Communication135
- Using the Global Status Flag File137
- Monitoring DH+ Communication Channels139
- Estimating DH+ Link Performance144
- Application Guidelines149
- Using this Chapter151
Chapter 10152
- Configuring the Controller152
- Serial Port152
- Using Channel 0152
- Cabling155
- Configuring Channel 0156
- Monitoring Channel 0 Status172
  - Using the System Mode Status Display172
  - Using the User Mode (ASCII) Status Display174
- Using this Chapter175
Chapter 11175
- Media and Cabling175
- Assigning Your IP Address176
- Network Addressing176
- Configuring Channel 2 for Ethernet Communication176
- Using Advanced Ethernet Functions183
- Using Domain Name Service189
- Using the Embedded Web Server190
  - Generating User Provided Web Pages196
  - Importing User Page Files to the PLC-5 Controller200
- Using Multihop Messaging203
  - Multihop Examples204
  - Over Ethernet206
- Communicating with Controllogix Devices206
- Tcp/Ip206
- Interpreting Error Codes207
- Interpreting Ethernet Status Data208
- Ethernet PLC-5 Performance Considerations211
- Using this Chapter213
Chapter 12214
- About Passwords and Privileges214
- Defining Privilege Classes215
- Assigning a Privilege Class to a Channel or Offline File216
- Assigning a Privilege Class to a Node216
- Assigning Read/Write Privileges to a Program File217
- Assigning Read/Write Privileges to a Data File217
Chapter 13219
- Using this Chapter219
- Forcing219
  - Forcing Inputs and Outputs219
  - Forcing SFC Transitions220
- Extended Forcing220
- Setting up and Using Extended Forcing223
- Using Special Programming Routines228
- Priority Scheduling for Interrupts and Mcps229
  - Program Execution States230
  - Influencing Priority Scheduling232
- Defining and Programming Interrupt Routines233
Programming Considerations219
Chapter 14235
- Using this Chapter235
- Setting Power-Up Protection235
- Allowing or Inhibiting Startup236
- Defining a Controller Power-Up Procedure236
- Using this Chapter239
Preparing Power-Up Routines235
Chapter 15 Understanding the Fault Routine Concept239
- Responses to a Major Fault239
- Understanding Controller-Detected Major Faults240
  - Fault in a Controller-Resident or Extended-Local I/O Rack241
  - Fault in a Remote I/O Chassis241
- Defining a Fault Routine242
- Defining a Watchdog Timer243
  - Avoiding Multiple Watchdog Faults244
- Programming a Fault Routine244
- Monitoring Faults249
- Using this Chapter253
Chapter 16253
- Selecting Main Control Programs253
- Understanding How the Controller Interprets Mcps254
- Configuring Mcps255
- Monitoring Mcps257
- Using this Chapter259
Chapter 17 Using a Selectable Timed Interrupt259
- Writing STI Ladder Logic259
- STI Application Example260
- Block-Transfers in Selectable Timed Interrupts (Stis)260
- Defining a Selectable Timed Interrupt261
- Monitoring Selectable Timed Interrupts262
- Using this Chapter263
Chapter 18 Using a Processor Input Interrupt263
- Writing PII Ladder Logic264
- PII Application Examples264
- Block-Transfers in Processor Input Interrupts (Piis)265
- Design Considerations266
- Defining a Controller Input Interrupt267
- Monitoring Controller Input Interrupts268
Appendix A269
- Controller Specifications269
- Memory and Channel Specifications270
- Memory Backup Devices272
  - EEPROM Compatibility272
Appendix B277
- S:3-10277
- S:11278
- S:12279
- S:13-S:24283
- S:26-S:35284
- S:36-S:78285
- S:79-S:127286
- I/O Backplane Transfer291
- Input and Output Modules Delay291
- Remote I/O Scan Time291
- Controller Time297
- Example Calculation298
- Performance Effects of Online Operations298
- Effect of Inserting Ladder Rungs at the 56K-Word Limit299
- Using Program Control Instructions300
  - Using JMP/LBL Instructions300
  - Using FOR/NXT Instructions300
Appendix D301
- Compare Instructions301
- Compute Instructions301
- Counter Instructions301
- Relay Instructions301
- Timer Instructions301
- Logical Instructions314
- Conversion Instructions315
- Bit Modify and Move Instructions316
- File Instructions317
- Diagnostic Instructions319
- Shift Register Instructions320
- Sequencer Instructions321
- Program Control Instructions322
- Block Transfer Instructions325
- Process Control, Message Instructions325
- Publication 1785-UM012D-EN-P - July325
- ASCII Instructions327
- Bit and Word Instructions330
- File, Program Control, and ASCII Instructions332
Appendix E Controller Switches340
- Switch 1340
- Switch 2340
- I/O Chassis Backplane342
- ASB Series C and D) Without Complementary I/O345
- Remote I/O Adapter Module345
- Extended-Local I/O Adapter Module347
- ALX) Configuration Plug348
Appendix F PLC-5 Controller349
Troubleshooting349
- General Problems350
- Controller Communication Channel Troubleshooting352
- Extended-Local I/O Troubleshooting353
- Ethernet Status Indicator353
- Ethernet Transmit LED354
- Remote I/O System354
  - Adapter Module354
  - Adapter Module (Continued)356
- Extended-Local I/O System357
  - Troubleshooting Guide for the 1771-ALX Adapter Module357
- Unexpected Operation When Entering Run Mode358
Appendix G361
- Channel 0 Pin Assignments361
- Connecting Diagrams361
- Programming Cable Specifications361
- Serial Cable Pin Assignments361
- Using this Chapter361
- Ethernet Cable Connections369

Brand	Allen-Bradley
Model	PLC-5
Category	Controller
Language	English

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