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80burritospersecond t1_j4imm1t wrote

Reply to comment by charleswj in Zero Days (2016) - Stuxnet, a piece of self-replicating computer malware that the U.S. and Israel unleashed to destroy a key part of an Iranian nuclear facility, and which ultimately spread beyond its intended target. [01:53:51] by Missing_Trillions

It's also kinda poor design to have all your emergency stop smash buttons be nothing but PLC inputs when they should be independently cutting power to the prime movers in whatever system is being controlled.

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Burdekin_Boy t1_j4jv36w wrote

Yeah Estops into PLCs should only really be for signal/logging. Stand-alone safety relays should be in use.

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