ControlLogix SIL2 System Configuration Using SIL2 Add …

1 Application Technique(Catalog Numbers 1756 and 1492) ControlLogix sil2 System ConfigurationUsing sil2 Add-On InstructionsImportant User InformationSolid state equipment has operational characteristics differing from those of electromechanical equipment. Safety Guidelines for the Application, Installation and Maintenance of Solid State Controls (publication available from your local Rockwell Automation sales office or online at ) describes some important differences between solid state equipment and hard-wired electromechanical devices. Because of this difference, and also because of the wide variety of uses for solid state equipment, all persons responsible for applying this equipment must satisfy themselves that each intended application of this equipment is no event will Rockwell Automation, Inc. be responsible or liable for indirect or consequential damages resulting from the use or application of this examples and diagrams in this manual are included solely for illustrative purposes.

2 Because of the many variables and requirements associated with any particular installation, Rockwell Automation, Inc. cannot assume responsibility or liability for actual use based on the examples and patent liability is assumed by Rockwell Automation, Inc. with respect to use of information, circuits, equipment, or software described in this of the contents of this manual, in whole or in part, without written permission of Rockwell Automation, Inc., is this manual, when necessary, we use notes to make you aware of safety , ControlLogix , Logix5000, RSLogix 5000, RSNetWorx for ControlNet, Rockwell Automation, and TechConnect are trademarks of Rockwell Automation, not belonging to Rockwell Automation are property of their respective information about practices or circumstances that can cause an explosion in a hazardous environment, which may lead to personal injury or death, property damage, or economic information that is critical for successful application and understanding of the information about practices or circumstances that can lead to personal injury or death, property damage, or economic loss.

3 Attentions help you identify a hazard, avoid a hazard, and recognize the consequenceSHOCK HAZARDL abels may be on or inside the equipment, for example, a drive or motor, to alert people that dangerous voltage may be HAZARDL abels may be on or inside the equipment, for example, a drive or motor, to alert people that surfaces may reach dangerous 1756-AT012A-EN-P - November 20083 Table of ContentsPrefaceAbout This Publication .. 9 Who Should Use This Publication .. 9 Conventions .. 9 About SIL .. 9 Additional Resources.. 10 Chapter 1 Fault-tolerant System ConfigurationAbout This Chapter .. 11 Fault Tolerance and the ControlLogix System .. 11 ControlLogix System sil2 Configurations .. 11 About Fault-tolerant Systems .. 12 Fault-tolerant Compared to Other sil2 Configurations .. 12 Fault-tolerant System Configuration .. 14 Remote I/O Configuration .

4 14 The Complete ControlLogix Fault-tolerant System .. 18 Additional Resources.. 19 Chapter 2 Fault-tolerant System HardwareAbout This Chapter .. 21 Approved I/O Modules and Termination Boards .. 21 About the Specialized Termination Boards .. 221756-IB32 DC Input Termination Board Features .. 22 Normal Operation of 1756-IB32 DC Input Termination Board .. 231756-IB32 DC Input Termination Board and Transition Tests .. 241756-IF16 Analog Input Termination Board .. 26 Normal Operation of the 1756-IF16 Analog Input Termination Board .. 27 One-sensor or Two-sensor Wiring Option.. 291756-IF16 Module Pair Reference Tests .. 301756-OB16D Diagnostic Output Termination Board Features 33 Normal Operation of the 1756-OB16D Diagnostic Output Termination Board .. 34 Diagnostic Tests and the 1756-OB16D Output Termination Board .. 35 Termination Board Relay Control.

5 361756-IB32 Input Termination Board Relay Control.. 361756-IF16 Analog Input-Termination Board Switch Control .. 371756-OB16D Output Termination Board Relay Control .. 38 Input Module Diagnostic Test Control .. 40 Hardware and Programming .. 40 Additional Resources.. 414 Publication 1756-AT012A-EN-P - November 2008 Table of ContentsChapter 3 Fault-tolerant Program ElementsAbout This Chapter .. 43 Overview of the Program Elements .. 43 Main Routine .. 43 sil2 Add-On Instructions .. 44 Diagnostic Features of Add-On Instruction Programming . 45 States of the System .. 46 Normal State .. 46 Test State.. 461oo1 State .. 47 Faulted State .. 48IB32_SIL2_Pair Instruction .. 49 Normal Operation - 1756-IB32 Module Pair.. 49 Test - 1756-IB32 Module Pair .. 501oo1 - 1756-IB32 Module Pair .. 50IF16_SIL2_Pair Instruction .. 51 Normal Operation - 1756-IF16 Module Pair.

6 51 Test - 1756-IF16 Module Pair .. 521oo1 - 1756-IF16 Module Pair.. 52IF16_RefCal Instruction .. 53OB16D_SIL2 Instruction .. 54 Normal Operation - 1756-OB16D .. 541oo1 - 1756-OB16D .. 55 The Fault-tolerant Program .. 55 Additional Resources.. 56 Publication 1756-AT012A-EN-P - November 20085 Table of ContentsChapter 4 Configuring the Fault-tolerant SystemAbout This Chapter .. 57 Before You Begin .. 57 Obtain Fault-tolerant sil2 Add-On Instructions .. 57 Configure Your Redundant Controller Chassis .. 58 Configuring Remote I/O Chassis .. 58 Add the Remote I/O Chassis to the I/O Configuration Tree .. 58 About Module-defined Tags .. 64 Adding Required Controller Tags .. 65 About Controller Tags for the 1756-OB16D Module Pair . 65 About Controller Tags for the 1756-IF16 Module Pair.. 65 Add Controller Tags .. 66 Import Add-On Instructions.

7 67 Using Add-On Instructions .. 681756-OB16D Module Pair Instruction Configuration .. 68 Add the OB16D sil2 Instruction and Edit Parameters .. 69 Edit OB16D sil2 Add-On Instruction Tags .. 731756-IB32 Module Pair Instruction Configuration .. 76 Add the IB32 sil2 Instruction and Edit Parameters .. 76 Edit IB32 sil2 Add-On Instruction Tags .. 791756-IF16 Module Pair Instruction Configuration .. 82 Add-On Instruction for the 1756-IF16 Module Pair.. 82 Edit IF16 sil2 Add-On Instruction Tags.. 85 Next Steps .. 89 Additional Resources.. 89 Chapter 5 Programming the Fault-tolerant SystemAbout This Chapter .. 91 Programming the Main Routine .. 91 Basic Input/Output Programming .. 92 Example Input/Output Rung .. 92 Module Pair Fault to Result in System Shutdown .. 92 Programming for a Demand on the System .. 93 Demand Made Through a 1756-IB32 Module Pair.

8 93 Demand Made Through a 1756-IF16 Module Pair .. 94 Power-up Sequence .. 95 Additional Resources.. 966 Publication 1756-AT012A-EN-P - November 2008 Table of ContentsChapter 6 Troubleshooting a Fault-tolerant SystemAbout This Chapter .. 97 Identifying a Faulted Module Pair .. 97 Replacing a Faulted 1756-IB32 Module .. 98 Example of Programming to Identify a Faulted Module Pair .. 98 Identifying a Faulted Module .. 991756-IB32 Module Pair Tags to Identify the Type of Module Fault .. 1001756-IF16 Module Pair Tags to Identify the Type of Module Fault .. 1001756-OB16D Module Pair Tags to Identify the Type of Module Fault .. 101 Using Resets .. 101 When to Use the Fault Reset .. 101 When to Use Circuit Reset .. 102 Examples of Faults and Resulting Tag Values .. 1031756-IB32 Module Pair - One Module Faulted .. 1031756-IF16 Module Pair - One Module Faulted and Removed.

9 1041756-IF16 Module Pair - Two Modules Faulted .. 105 Additional Resources.. 106 Appendix ASIL2 Add-On Instruction TagsAbout This Appendix .. 1071756-IB32 Module Pair Tags .. 107IB32_SIL2_Pair Tags for System Behavior .. 107IB32_SIL2_Pair Module Status Tags .. 109IB32_SIL2_Pair Tags for Use in Programming .. 111IB32_SIL2_Pair Tags Not for Use.. 1111756-IF16 Module Pair Tags.. 112IF16_SIL2_Pair Tags for System Behavior .. 112IF16_SIL2_Pair Module Status Tags .. 114IF16_SIL2_Pair Tags for Use in Programming .. 116IF16_SIL2_Pair Tags Not for Use .. 1171756-OB16D Module Pair Tags .. 118OB16D_SIL2_Pair Tags for System Behavior .. 118OB16D_SIL2_Pair Module Status Tags.. 119OB16D_SIL2_Pair Tags for Use in Programming .. 121OB16D_SIL2_Pair Tags Not for Use .. 122 Appendix BSIL2 Fault-tolerant TopologyAbout This Appendix.

10 123 Planning Considerations .. 123 Publication 1756-AT012A-EN-P - November 20087 Table of ContentsAppendix CFault-tolerant System LimitationsAbout This Appendix .. 125 About Faults and Overall Fault-tolerance .. 125 Detecting System -side Versus Field-side Faults .. 125 Limits of Fault-detection from the 1756-OB16D Termination Board .. 125 Module Pair Faults .. 126 Appendix DFrequently Asked QuestionsAbout This Appendix .. 127 About Redundant Chassis .. 127 About I/O.. 130 About Fail-safe and Fault-tolerant Programs .. 133 GlossaryIndex8 Publication 1756-AT012A-EN-P - November 2008 Table of ContentsPublication 1756-AT012A-EN-P - November 20089 PrefaceAbout This PublicationThis publication provides techniques and guidelines for configuring a sil2 -certified, ControlLogix fault-tolerant System by Using sil2 Add-On Instructions provided by Rockwell Automation.