Thanks Kent; you know how inquiring minds are, I see such a superbly constructed well thought out machine figuring there were redundancies and overrides but I try not to just assume they exist.
I used to design and build freight elevators. A lot of manufactures who were in the same type of business would skirt the safety codes and requirements by calling their machines vertical reciprocating conveyors. carefully avoiding any mention or association with words like hoists lifts elevators etc. but ours were called what they were elevators designed to lift or hoist freight either bulky or compact heavy loads without an onboard operator although many had operator controls inside or on the platform for emergency use or servicing there by having to meet the more stringent for human transport codes applicable to the region.