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Publication 1756-RM093F-EN-P - January 2010 15
Safety Integrity Level (SIL) Concept Chapter 1
GuardLogix Architecture
for SIL 3 Applications
The following illustration shows a typical SIL function, including:
• the overall safety function.
• the GuardLogix portion of the overall safety function.
• how other devices (for example, HMI) are connected, while
operating outside the function.
Typical SIL Function
1756-DNB
To Plant-wide Ethernet
SIL 3 GuardLogix System
Programming Software
HMI
Read-only Access to Safety Tags
Overall Safety Function
1756-L6xS
1756-LSP
1756-ENBT
Switch
Actuator
DeviceNet Safety Network
Sensor
CIP Safety
I/O Module
CIP Safety
I/O Module
CIP Safety I/O Module on
Ethernet Network
CIP Safety
Actuator
Sensor
Actuator
Sensor
SIL 3 Compact GuardLogix System
CIP Safety I/O Module on
Ethernet Network
Compact GuardLogix Controller with 1768-ENBT Module
- GuardLogix Controller Systems 1
- Important User Information 2
- Summary of Changes 3
- Table of Contents 5
- About This Publication 9
- Who Should Use This 9
- Publication 9
- Understanding Terminology 10
- Additional Resources 11
- Preface 12
- SIL 3 Certification 13
- Functional Verification 14
- GuardLogix Architecture 15
- GuardLogix System 16
- Components 16
- GuardLogix Certifications 18
- GuardLogix PFD and PFH 19
- Specifications 19
- Safety Integrity Level (SIL) 20
- Compliance Distribution 20
- System Reaction Time 21
- Contact Information If 22
- Device Failure Occurs 22
- GuardLogix Controller System 23
- Primary Controller 24
- Safety Partner 24
- Power Supplies 24
- 1768 Compact GuardLogix 25
- Controller Hardware 25
- CIP Safety Protocol 25
- Safety I/O 25
- Communication Bridges 26
- DeviceNet Safety Network 27
- ControlNet Network 27
- Programming Overview 28
- Overview 29
- Typical Safety Functions of 29
- CIP Safety I/O Modules 29
- Diagnostics 30
- Status Data 30
- Status Indicators 30
- On- or Off-delay Function 30
- Reaction Time 31
- Safety Considerations for 31
- I/O Module Replacement 32
- Configure Always 33
- The Routable CIP Safety 35
- Control System 35
- Unique Node Reference 36
- Safety Network Number 36
- SNN Formats 37
- IMPORTANT 37
- Considerations for 38
- Assigning the Safety 38
- Network Number (SNN) 38
- ATTENTION 39
- Task, and Safety Programs 41
- SIL 2 Safety Applications 42
- I0 I1 T0 T1 43
- Controllers Only) 45
- SIL 2 Input Data 46
- SIL3 Safety – the Safety 47
- Safety Task Limitations 48
- Safety Task Execution Details 48
- Safety Programs 49
- Safety Routines 50
- Safety Tags 50
- MappedBooleanTag LatchOneShot 51
- Node30ComboModule:O.Pt03Data 51
- Commissioning Life Cycle 54
- Create the Project 56
- Test the Application Program 56
- Project Verification Test 57
- Confirm the Project 58
- Safety Validation 60
- Downloading the Safety 61
- Application Program 61
- Uploading the Safety 61
- Online Editing 61
- Storing and Loading a 62
- Project from Nonvolatile 62
- Force Data 62
- Inhibit a Module 63
- Editing Your Safety 63
- Application 63
- Performing Offline Edits 64
- Performing Online Edits 64
- Edit Your Project 65
- Monitoring System Status 67
- I/O Module Connection Status 68
- De-energize to Trip System 69
- on page 73 are 70
- Ladder Logic Example 1 71
- Ladder Logic Example 2 72
- Ladder Logic Example 3 73
- GuardLogix System Faults 74
- Nonrecoverable Safety Faults 75
- Recoverable Faults 76
- Safety Instructions 77
- Metal Form Safety 79
- Application Instructions 79
- Safety Add-On Instructions 83
- Create or Open a Project 84
- Reaction Times 89
- Communication Module 90
- GuardLogix Controller 90
- Applications 95
- Checklist for Safety Inputs 97
- Checklist for Safety Outputs 98
- Checklist for Developing a 99
- Safety Application Program 99
- Appendix 101
- Introduction 101
- GuardLogix Controller and 101
- Guard I/O Safety Data 101
- PFD Values 102
- PFH Values 102
- Glossary 103
- Numerics 109
- Rockwell Automation Support 114
- Documentation Feedback 114
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