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GuardLogix Controller Systems Safety Reference Manual

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GuardLogix Controller SystemsCatalog Numbers 1756-L61S, 1756-L62S, 1756-L63S, 1756-L72S, 1756-L73S, 1756-L72SXT, 1756-LSP, 1756-L7SP, 1756-L7SPXTSafety Reference ManualImportant 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 SGI-1.1 available from your local Rockwell Automation sales office or online at http://www.rockwellautomation.com/literature/) 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 acceptable.In no event will Rockwell Automation, Inc. be responsible or liable for indirect or consequential damages resulting from the use or application of this equipment.The examples and diagrams in this manual are included solely for illustrative purposes. 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 diagrams.No patent liability is assumed by Rockwell Automation, Inc. with respect to use of information, circuits, equipment, or software described in this manual.Reproduction of the contents of this manual, in whole or in part, without written permission of Rockwell Automation, Inc., is prohibited.Throughout this manual, when necessary, we use notes to make you aware of safety considerations.Rockwell Automation, Allen-Bradley, TechConnect, ControlLogix, GuardLogix, CompactLogix, CompactBlock Guard I/O, ArmorBlock Guard I/O, POINT Guard I/O, Guard I/O, FLEX I/O, SmartGuard, ControlLogix-XT, ControlFLASH, Logix5000, SLC, RSLogix 5000, and FactoryTalk Security are trademarks of Rockwell Automation, Inc.Trademarks not belonging to Rockwell Automation are property of their respective companies.WARNING: Identifies 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 loss.ATTENTION: Identifies information about practices or circumstances that can lead to personal injury or death, property damage, or economic loss. Attentions help you identify a hazard, avoid a hazard, and recognize the consequence.SHOCK HAZARD: Labels may be on or inside the equipment, for example, a drive or motor, to alert people that dangerous voltage may be present.BURN HAZARD: Labels may be on or inside the equipment, for example, a drive or motor, to alert people that surfaces may reach dangerous temperatures.IMPORTANTIdentifies information that is critical for successful application and understanding of the product.Rockwell Automation Publication 1756-RM093G-EN-P - February 20123Summary of ChangesThis manual contains new and updated information. Changes throughout this revision are marked by change bars, as shown to the right of this paragraph.New and Updated InformationThis table contains the changes made to this revision.TopicPageAdded information on 1756-L72S, 1756-L73S(XT), 1756-L7SP(XT) controllersthroughoutUpdated Additional Resources list10Updated lists of GuardLogix® system components14…16Updated list of communication interface modules24Added information on POINT Guard I/O™ input modules for SIL 2 applications39Safety task period limit updated to 500 ms41Requested packet interval configurable range is now 6…500 ms42Added information on using HMIs43Added Dual-channel Analog Input (DCA_INPUT) to the list of valid data types46Added restrictions on safety tags created by using the REAL data type (They are valid only on 1756-L7xS safety controllers)46Added table of controller modes and safety status50Added Dual-channel Analog Input, DCA(F) instruction to the list of safety application instructions69Added new instructions to the list of standard instructions allowed in safety programs71, 72Added information on POINT Guard I/O analog modules93Worst-case Reaction Time examples have been updatedAppendix CMoved information on using RSLogix 5000™ software, version 14, safety application instructionsAppendix FMoved information on compliance with EN 50156 and included information on FLEX™ I/O modulesAppendix G4Rockwell Automation Publication 1756-RM093G-EN-P - February 2012Summary of ChangesNotes:Rockwell Automation Publication 1756-RM093G-EN-P - February 20125Table of ContentsPrefaceUnderstanding Terminology . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9Additional Resources. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10Chapter 1Safety Integrity Level (SIL) ConceptSIL 3 Certification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11Functional Verification Tests. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12GuardLogix Architecture for SIL 3 Applications. . . . . . . . . . . . . . . . . . . . 13GuardLogix System Components. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14GuardLogix Certifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16GuardLogix PFD and PFH Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . 16Safety Integrity Level (SIL) Compliance Distribution and Weight. . . . 17System Reaction Time. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18Safety Task Reaction Time . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18Safety Task Period and Safety Task Watchdog . . . . . . . . . . . . . . . . . . 19Contact Information if Device Failure Occurs . . . . . . . . . . . . . . . . . . . . . . 19Chapter 2GuardLogix Controller System1756 GuardLogix Controller Hardware. . . . . . . . . . . . . . . . . . . . . . . . . . . . 21Primary Controller . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22Safety Partner . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22Chassis . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22Power Supplies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 221768 Compact GuardLogix Controller Hardware . . . . . . . . . . . . . . . . . . 23CIP Safety Protocol . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23Safety I/O . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23Communication Bridges. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24Programming Overview. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26Chapter 3CIP Safety I/O for the GuardLogix Control SystemOverview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27Typical Safety Functions of CIP Safety I/O Modules. . . . . . . . . . . . . . . . 27Diagnostics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28Status Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28Status Indicators. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28On- or Off-delay Function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28Reaction Time . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28Safety Considerations for CIP Safety I/O Modules. . . . . . . . . . . . . . . . . . 29Ownership. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29Safety I/O Configuration Signature. . . . . . . . . . . . . . . . . . . . . . . . . . . . 29I/O Module Replacement. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

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