6 Rockwell Automation Publication 1756-RM093J-EN-P - April 2018
Table of Contents
Appendix C
Reaction Times
System Reaction Time . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 81
Logix System Reaction Time . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 81
Simple Input-logic-output Chain . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82
Logic Chain Using Produced/Consumed Safety Tags. . . . . . . . . . . . 83
Factors Affecting Logix Reaction-time Components . . . . . . . . . . . . . . . . 84
Accessing Input Module Delay Time Settings . . . . . . . . . . . . . . . . . . . 84
Accessing Input and Output Safety Connection Reaction Time
Limit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 85
Configuring the Safety Task Period and Watchdog. . . . . . . . . . . . . . 86
Accessing Produced/Consumed Tag Data . . . . . . . . . . . . . . . . . . . . . . 87
Additional Resources . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 88
Appendix D
Checklists for GuardLogix Safety
Applications
Checklist for GuardLogix Controller System . . . . . . . . . . . . . . . . . . . . . . . 89
Checklist for Safety Inputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 91
Checklist for Safety Outputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 92
Checklist for Developing a Safety Application Program. . . . . . . . . . . . . . 93
Appendix E
GuardLogix Systems Safety Data
PFD Values . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 95
PFH Values. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 96
Appendix F
RSLogix 5000 Software, Version 14
and Later, Safety Application
Instructions
De-energize to Trip System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 97
Use Connection Status Data to Initiate a Fault Programmatically . . . . 97
Appendix G
Using 1794 FLEX™ I/O Modules and
1756 SIL 2 Inputs and Outputs with
1756 GuardLogix Controllers to
Comply with EN 50156
SIL 2 Dual-channel Inputs (standard side of 1756 GuardLogix
controllers) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 103
SIL 2 Outputs Using SIL 3 Guard I/O Output Modules . . . . . . . . . . . 105
SIL 2 Outputs Using 1756 or 1794 SIL 2 Output Modules . . . . . . . . . 105
Safety Functions within the 1756 GuardLogix Safety Task. . . . . . . . . . 106
Glossary
Index
To Next Page
Loading...
