90 Rockwell Automation Publication 1756-RM093J-EN-P - April 2018
Appendix D Checklists for GuardLogix Safety Applications
Checklist for GuardLogix Controller System
Checklist for GuardLogix System
Company
Site
Safety Function Definition
Number System Requirements
Fulfilled Comment
Yes No
1 Are you using only the components listed in
SIL 3-certified GuardLogix Components
on page 14 and on the http://www.rockwellautomation.com/
products/certification/safety/ site, with the corresponding firmware release?
2 Have you calculated the system’s safety response time for each safety chain?
3 Does the system’s response time include both the user-defined safety task program watchdog (software
watchdog) time and the safety task rate/period?
4 Is the system response time in proper relation to the process tolerance time?
5 Have probability (PFD/PFH) values been calculated according to the system’s configuration?
6 Have you performed all appropriate functional verification tests?
7 Have you determined how your system will handle faults?
8 Does each network in the safety system have a unique SNN?
9 Is each CIP safety device configured with the correct SNN?
10 Have you generated a safety task signature?
11 Have you uploaded and recorded the safety task signature for future comparison?
12 Following a download, have you verified that the safety task signature in the controller matches the recorded
safety task signature?
13 Do you have an alternate mechanism in place to preserve the safety integrity of the system when making
online edits?
14 Have you taken into consideration the checklists for using SIL inputs and outputs listed on pages
91 and 92?
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