List of Special Elevator Modes • Hacker News Board

Re: List of Special Elevator Modes

#151

Post by [deleted] » Fri, Jul 09, 2021, 3:58 AM UTC

pram wrote: post #136

svat wrote: post #86

Donald Knuth's The Art of Computer Programming has, in its first volume, a lengthy section on simulating an elevator. It is a single regular elevator (nothing "special" going on as in the post here), but even so, as he tries to make things precise, you realize how much detail is involved, and get some appreciation for the task of programming. It occupies about 15 pages (plus several pages of exercises and solutions).…

If you love elevators try out SimTower, it's all about micromanaging them!

[deleted]

Re: List of Special Elevator Modes

#152

Post by dlgeek » Fri, Jul 09, 2021, 4:15 AM UTC

BigJono wrote: post #123

lozf wrote: post #111

Deviant Ollam & Howard Payne did a great talk on Elevator Hacking at Def Con 22. You can catch it at: https://archive.org/details/Defcon22_Talk29/DEF+CON+22+Hacki... or https://www.youtube.com/watch?v=oHf1vD5_b5I [01:00:15]

This is one of my favourite talks ever. I couldn't have given less of a shit about the topic and wasn't expecting to watch more than 5 minutes of it. Nek minnut the video is ending and I wanted another hour of it haha.

Look for "This key is your key, this key is my key" by the same pair. It's basically that.

Re: List of Special Elevator Modes

#153

Post by gorgoiler » Fri, Jul 09, 2021, 4:29 AM UTC

fortran77 wrote: post #16

dinkleberg wrote: post #8

Maybe this is common knowledge, but I never knew people used fandom for topics like this. I’m amazed that it had 800+ articles and over 1000 videos on a wiki dedicated to elevators.

There are many "elevator spotters" on YouTube. I can watch elevator videos for hours. For example: https://www.youtube.com/watch?v=nE9x-S_3sdY It's a very interesting community: See: https://www.youtube.com/watch?v=iz9ZzIgyDR8

Fantastic.

> watch for hours

The call time on the incline elevator… wow you weren’t kidding.

Also, at 5m40s is that a domestic clock being used for station timekeeping? Such a shame given the rest of the station design and the amount of time and money that went into it all. Details, people. Details :)

Re: List of Special Elevator Modes

#154

Post by jackbeck » Fri, Jul 09, 2021, 5:21 AM UTC

dmurray wrote: post #33

jackbeck wrote: post #22

Earlier quoted context omitted.

There are sects (like the ultra orthodox) who don't use Sabbath mode specifically for this reason. They say that the added weight causes the elevator's motor to work harder thereby desecrating the Sabbath.

Are they allowed to go down? Also, depending on the counterweight and the current load of the elevator, adding an extra person to it might tax the motor less even when ascending.

There are opinions that say that ascending is fine, but it’s fairly unanimous that descending is forbidden.

Re: List of Special Elevator Modes

#155

Post by nextlevelwizard » Fri, Jul 09, 2021, 5:33 AM UTC

llampx wrote: post #49

I wondered why, during the pandemic, it wasn't common to let elevators "air out" while they were idle. Given what we know about COVID-19 and how it spreads with aerosols. From looking at this list, it appears that that's not a mode they would have by default.

As someone who works in the elevator industry this list is pretty odd and is missing many modes that I would consider default modes.

However to get back to "airing the elevator out". Do you mean just not closing doors after serving a call? Maybe having someone timeout after serving a call to not move? Or actually installing fans to blow out the air?

Re: List of Special Elevator Modes

#156

Post by nextlevelwizard » Fri, Jul 09, 2021, 5:35 AM UTC

jakemal wrote: post #60

galago wrote: post #55

Earlier quoted context omitted.

I work in an office building that's less than 5 years old. During the pandemic the elevators started returning to the ground floor and opening their doors. I wonder if the system is configured via the control panel in the elevator or if there's some other interface.

Sounds like it was in up-peak mode? https://elevation.fandom.com/wiki/Up_peak_(MIT)

More likely just a static parking rule. Usually "peak" modes are dynamic and only in effect when there is a lot of usage i.e. peak in traffic

Re: List of Special Elevator Modes

#157

Post by nextlevelwizard » Fri, Jul 09, 2021, 5:37 AM UTC

dqv wrote: post #14

Since we’re talking about elevators, it would appear anyone can call the elevator’s emergency phone line. Which is good, but also has unintended consequences: https://vm.tiktok.com/ZMdXyQ5ra/

Depends on model and implementation. Usually these days the alarm phone will not pick up calls from any number (allow list used), but this looks like older car, so this might be retrofitted and/or maybe some software rules were not set during installation.

Re: List of Special Elevator Modes

#158

Post by nextlevelwizard » Fri, Jul 09, 2021, 5:40 AM UTC

tgsovlerkhgsel wrote: post #126

The elevator in my building only lets you select one floor. Accidentally press the one above yours? Now you have to go there first. Any idea what the purpose of that is? Price discrimination? Abuse prevention? "Well, the ancient elevator did it that way and we want the new one to be the same" backwards "compatibility"?

Probably extremely aggressive nuisance prevention. You could try holding the wrongly selected button down for 3-5 seconds and see if that cancels the call so you can give another one.

Re: List of Special Elevator Modes

#159

Post by nextlevelwizard » Fri, Jul 09, 2021, 5:41 AM UTC

theHIDninja wrote: post #133

There is also riot mode, where it won't stop on the first floor. It's used to stop people from just running in off the street and using elevators.

The floor or set of floors is usually configurable these days. Since in modern buildings you can have multiple entrance floors.

Re: List of Special Elevator Modes

#160

Post by nextlevelwizard » Fri, Jul 09, 2021, 5:42 AM UTC

banana_giraffe wrote: post #77

Another such list is on Wikipedia: https://en.wikipedia.org/wiki/Elevator#Special_operating_mod... Wiki lists a "Riot mode", which is just amazing if it's a thing.

It has different names on different manufacturers, but yes it is a thing.