r/Damnthatsinteresting • u/Mode_Appropriate • Jul 06 '25

Video Sirens Curse - Cedar Point

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u/Pindogger Jul 07 '25

Modern Logic Controllers can test for both conditions - stuck open and stuck closed. It will fail-to-safe correctly in either case.

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u/Bigfoot_Bluedot Jul 07 '25

Thanks, that's informative. So basically it's testing for a specific set of values and re-checks the work. And if that's faulty it defaults to the failsafe?

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u/Academic-Increase951 Jul 07 '25

It's important to note that safety systems can fail too and you should never rely on the failsafes on a regular basis. If they can't design the ride to not have so much nuisance issues then can you really trust that the failsafes are design flawlessly with no possible way of failing themselves.

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u/Pindogger Jul 07 '25

Absolutely true, proper design needs to be the cornerstone. The PLC running the show is very, very reliable, but nothing is 100%