Late night ELEVATOR CIRCUITS - BEGINNERS WELCOME!
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- Опубликовано: 15 окт 2024
- Grab a cocoa and join me as I explain how some of "The Express Lift Company" elevator logic circuits work. Beginners are welcome, as I explain everything from absolute basics using diagrams and then onto the fantastic EVERYCIRCUIT animated circuit designer and tester.
Ok, maybe old Lift logic circuits are not everyone's cup of tea, and it is one of my longest videos. Normally I try to keep them well under 15 minutes, but for people that want to know how the genius's from the 1960s and 70s design some of the circuits that make lifts work before microprocessors arrived on scene, then THIS IS FOR YOU!!
Lift circuits are normally MASSIVE involving hundreds of relays, timers and mechanical floor selector systems, but here I'm keeping everything to a minimum so that even beginners can understand. This means the circuits shown here are a fraction of the real system.
I hope that you enjoy watching, and maybe learn a thing or two!
("late night?" - I recorded it very late at night, so I had to contain my excitement from constructing these wicked circuits else I'd have woken up mrchay and wife HAHA!)
I used to be a technician for amusement machines back in the 1970's when everything was controlled electro mechanically. Loved the job and tracing faults was a great - and frustrating at times - hobby! There were dozens of relays and 100's if not 1000's of contacts in pin ball machines for instance. Soon as the electronics started to take over I quit, I was totally bamboozled by 'little black boxes and boards full of chips'. You could trace any fault on relay circuits with your eye just like the above video as long as you had the knowledge and the help of the schematics, electronics well that's a very different game.
Out of interest, what tended to be the issue that caused faults?- broken cables, relays that got stuck, etc?
That was fascinating! Thank you very much for your explanation. My plan as a child was to become a lift engineer but never actually happened. Ended up doing doing regular electronic engineering and RF design instead. Great videos!
Awesome!! Ever since seeing a relay based setup at my work, I was fascinated by how the logic behind the controllers worked. I tried to figure it out and came up with something similar to your explanation but there were a number of things I couldn't figure out. There were a few 'lightbulb' moments when I watched this video. Thanks for such a brilliant explanation and I'm sure there are a lot of us out there who are still fascinated by the electromechanical era and the ingenious solutions that were found.
Cool!! Your comments are exactly what I set out to do and glad you enjoyed and (hopefully!) understood it! ;)
I have sat down and started to try and draw up a diagram for an experimental setup. It's a lot of fun to try and figure out an actual circuit. I see from above that this has been attempted already but I am just trying to get my head around it and couldn't even imagine trying to actually build it. So far, my design has 10 relays per floor and I have not even attempted to get my head around the logic behind stopping / opening / closing / restarting.
What an informative video, much appreciated!
I just think there's a little design flaw with the two bulbs you added in the end. The interlock (on the low-side of the coils) between the two relays does not stop both lights from coming on simultaneously, it just works on the two relays. But there's no space left on the sheet, so for demonstration purposes this should be okay.
I think having a simulator that can correctly simulate muulti-pole relays would be great. A few weeks ago, I had to reverse engineer a PCB with a bunch of relays and other components on it to find what's wrong with it. (No schematic available). Was quite a mess to unfold all the traces on the pcb to find out how it is supposed to work without having the chance to simulate it.
Very nice, for some I'm thinking of the idea to make my own lift simulator. I've got some arcade push buttons that I bought a while ago and a raspberry pi. I've done a bit of game programming in the past so I might have a go at it.
i am a elevator technician . i did basic plc course . but i am a lil rusty . lol .. need to do over a short course or further it .. nice video
Thanks :) Sorry the video is so long, in fact this is my longest video. I normally try to keep them under 10 times, this one failed miserably LOL!
Well done again Matt, you have really started something now, the questions are just going to keep coming from all your followers. Give us a call if their is something your not sure about from the circuits point of view.
I enjoy answering (sensible) questions! Thanks Pete and I'll let you know if I do. I'm going to construct this with some Express equipment, actually I do have a question for you! I'll send it in a PM or text you later.
Thanks Mr Chay. I learned a lot.
very detailed mate love it hope you get more of these kind of vids :)
This is a very long video, I would normally try to limit them to about 10 minutes, but for those who are interested as you said, loads of detail in there! This video is a bit of a tester to see if people enjoy it, yep, could do some more! I actually have a Express Selector and some kit that could be connected up. Thanks for comment :)
i hope to see that amazing selector working one time :D Wish i had the patience to make a mock up one at school!
Hi Julian, The next part, I will be wiring up an old Express Lift selector with some actual Express lifts lanterns and floor position indicators. My wife is going to love the state of the dining room table when this is all rigged up!! I cannot give you a time, just I will do it "soon"(ish!)
mrmattandmrchay hahaha I can't wait!! My model lift will just use some micro roller switches to act as pseudo PLU and PLD inputs to the PLC. As it will only be two floors, I will not need any insane logic to decide which direction to go in. A down call on the top floor must mean the lift should go up, so it runs the motor at high speed until it hits PLU and then stop when it hits the top roller. Then I'll make a lift car with some push buttons inside that are the car call push buttons. This elevator will be a goods lift so no need to make a working door operator. Just have to ask my woodwork teacher if I can make it! I hope when I make a video about it you may stop on by and have a little look, I am of course very new to editing, and only ever have edited using my phone and the RUclips app!! Anyway we will see how it goes.
This has inspired me to create my own controller however, given the cost of relays, I'm planning a logic gate system. It's not relays but is still a challenge. Lots of AND gates, latches, and switches.
Can't wait to watch this tonight! Hype! :D
haha, it is rather a long video, but I didn't really want to chop it into different parts. Hope you enjoy it!
forgot my coca but I realy enjoyed it thanks m8
+chafik chaf haha yes this is my longest video! I try not to go too far over 10 minutes but this one was an exception! Thanks for watching :)
Very informative! A great video :-)
Thanks :)
Many thanks !
I wonder if you could give the name of the electrical simulator and from where can I get it
Many thanks again
It's an on-line circuit simulator... everycircuit.com/app
Hello, what a creat work. Thank you. MfG Jan
Thanks :)
cool Express Lift vldeo mrmatt
How would it work with 2 elevators?
TY
nice explanatory video.
i want to connect the cop with controller through rs485 communication can you give me any guidelines
Very vague description, so sorry cannot help as a one-liner description doesn't give me hardly any idea of what you are trying to do or achieve with which system. I know about RS485 comms, but to intercept a manufacturer's protocols (if it's not encrypted) is impossible unless you have a lot of time on your hands. Also, I am not a lift engineer.
mrmattandmrchay thank you for the early reply.
I will give you a brief idea about what I will do.
I want to connect the COP buttons to the lift controller which is parallel(not coded).I will carry the buttons signal to lift controller through rs485 conversation and convert it back to parallel at controller side so that it reduces wires used.
Yep, I now understand exactly what you are doing, that's taking all the button from the COP inputs via 485 (2 or 4 wire) to separate relays in the motor room to connect to controller. Saves lots of wires from car to motor room. Unfortunately, my industry is Access Control systems and I am not a lift engineer. No doubt, the hardware you require is readily available in a elevator parts catalogue, but I am not in a position to be able to offer you information on the product you require. Maybe someone else reading this can help you. Sorry about that.
actually this lift cant come to ground because there is no limit for that floor
the thing is your ground floor switch on directional side is directly connected to ground and +ve supply
Sorry, I cannot see it (you mean at 48:50 when the switch shows in red as an error?). One side is connected to +POS, but the other side has to go through either the top (up) or bottom (down) relays and is not connected directly to a neg. I cannot see why the circuit designer failed the circuit, but it's the PRINCIPLE that I'm teaching here.
سلام الأخ جميل ممكن تصلح الخطأ برسم .شكرا
some lifts have a rear door. how are their circuits different?
On Express Lift controllers the car door open and close contactors are numbered 20 & 21 respectively. If the installation has rear doors fitted as well, known as a through car , then a second set of contactors is fitted in the control panel numbered 20R & 21R. They are operated by a DZ (door zone) inductor fitted on the lift car with associated plates positioned on the inductor rails in the shaft. For instance if floors G 1 and 2 were served by the front doors then plates would only be fitted at the respective levels. Then floors 3 and 4 were served by the rear car door then a second inductor DZR would be operated by plates fitted at those floor levels on a separate rail. No plates would be fitted at 3&4 on the DZ rail to prevent the front doors from opening. If you have front and rear opening at the same floor then just fit inductor plates on BOTH rails at that floor. I hope this has made some sense, but if you have any more questions just ask.
24:00 you broke the lamp. Cool.
I wired up my elevator panel with relays ,i took me 2 hours it was really hard to do and i had ten fails when i was about to film it didn't work and i was not very happy after all that .
Ah no! So did you rig up this circuit, or were you designing your own version? I'm actually going to be constructing this with some ACTUAL Express Lifts lanterns (+ floor selector) sometime soon!
I was designing my own with real relays ,Express lift floor selectors are really cool and old lifts are awesome . cant wait to see your lift lanterns mrmatt
I love the old 1970,s Otis lifts I filmed a couple of those where I live and they were completely all original .
good
thanks :)
Oh my godness. Are you a technician?
Sorry for late reply, I am an engineer and have worked with relays for a long long time now (since I was about 8 years old), but I'm an engineer not in the lift industry (Access Control systems).
mrmattandmrchay I understand, it's a very hard work as I have seen. I'll become an engineer in the future...
sir do u have apps that can i use it for my tuorial
No sorry.
What name program use ???
everycircuit.com/
mis asaa
This type of Express selector.was developed from the GPO telephone selector system,They were “fiddly”to set up when worn on a call out.The Lift would often skip floors too.Now of course selectors in controllers are much more sophisticated,without any mechanically moving parts.Mostly the trouble was caused by the brass selector cog wheel which became worn.Takes me back a few years.I had 45 enjoyable years in the Lift trade.12 of them as Express engineer covering call outs for five years.appy Dayz,good video.thanks.
please a pdf for this cours .?????
Sorry there is no PDF. I'm here to create videos :)
in regards to the circuit app i prefer the original java applet: www.falstad.com/circuit/
everycircuit is nice though
Oh yes, thanks for the info. It's the same application I think? (still no DPDT relays !)
mrmattandmrchay, yeah, its got SPDT "analog switches", (under active building blocks). you could wire two together and it would behave like a DPDT relay but it would just look a mess. im gonna take a look at the javascript and see if i cant hack in a proper DPDT later today
actually thats probably unnecessary, packing them together doesnt look too bad, and you can stack them up to arbitrary lengths
puu.sh/vIwz1/2b0d52af19.png
im not sure about the performance of having tons of these on screen though so your mileage may vary with this
First
LOL, video is 52 minutes and it's only been activated for one minute! So, I can't say thanks for watching it :D :D (just joking ;)