Frequently Asked Questions

I´m working with ExSilentia and I installed a "Generic SIL 3 certified PLC" from the SERH database with a poof test interval of 7 years. The contribution to the PFDAv informed by the software is 1.06E-4 (please see the attached screen capture). However in
Last Updated a year ago

The Generic SIL 3 Safety PLC assumes 1oo2D architecture, and not 1oo1. The redundancy explains the PFDavg result. Also, simplified equations are not valid if the product of failure rate and test interval is greater than 0.1.

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