User manual

96 Publication 1756-RM093F-EN-P - January 2010
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 16 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 97
and 98?