I'm a big proponent of isolating control system networks. If someone has physical access to your facility then the game is already up. I also quite like the i

I'm a big proponent of isolating control system networks. If someone has physical access to your facility then the game is already up. I also quite like the idea of control systems being entirely on FPGA. Don't let any part of your computer be the thing that can stop the state machine. That includes network connections and operating systems.