>>107108960 (OP)
IIRC, in the book he was the only programmer on-site, but was remotely working together with his team back home.
>>107109064
Not using PLCs for the "simple" park automations like electric fences and whatnot seems strange to me, although the park spans kilometers and kilometers, which would be hard to cover with a 90s technology fieldbus.
Today, I'd do it with safety plcs interconnected with something like profisafe over fiber optic.
...which leads to another problem: how should the failsafe be handled? Electrify everything by default (and risk killing someone by mistake)? Disable everything by default (and risk letting dinos escape)?