Why can you press up or down to call an elevator, when the buttons inside the cabin determine where you go?

Question

What is the purpose of having up or down buttons to call a elevator? I can get into the elevator and do the opposite if whatever direction I pressed. If not already done, shouldn't there just be one button, or do they actually serve a purpose?

Answer 1

I can understand what you mean, but I've seen on some elevators if its going down and you want to go to a higher floor you have to wait for it to finish the run down, it serves more of a purpose on a system with more than one elevator though, sort of if you and another person are on the same floor and push the button to call the elevator and you want to go up, but the other person wants to go down its easier and faster to have the second button to call another car to make the other run. Honestly I'm not sure check how stuff works about that, "



"Some elevators just feature a single call button, others feature up and down call buttons, depending on whether you want to go up or down, respectively.



It will take a while for the Elevator to reach your floor, and the time will vary depending on what floor the elevator car is currently at, how many people in between the floors between the actual elevator car and you have pressed the buttons on their floors, which makes the elevator car stop there first. For this reason, elevators often feature up and down buttons instead of just one call button; in this case, calling an elevator while it is in motion will make the elevator stop for you only if you're heading in the same direction. Otherwise, it will attend to the request at the next possible opportunity, such as when someone in the elevator selects to go to (or past) your floor, or when it becomes idle."

Answer 2

Elevator Call Button

Answer 3

This Site Might Help You.



RE:

Why can you press up or down to call an elevator, when the buttons inside the cabin determine where you go?

What is the purpose of having up or down buttons to call a elevator? I can get into the elevator and do the opposite if whatever direction I pressed. If not already done, shouldn't there just be one button, or do they actually serve a purpose?

Answer 4

I'm not sure why you asked this in cars and transportation, but the answer is a simple one.



When you press the "Down" button to call the elevator, the ones going up will not stop at your floor. Likewise if you press the "Up" button, those going down won't stop and waste your time.



While it's true you could press lobby after pressing the up button if you are the only passenger, if there are others going up you would have to wait until the last person going up was off before you could start back down.

Answer 5

When multiple elevators are in use, the up and down (call) buttons serve to tell the system whether or not to stop an elevator at that floor. For instance, you are on the 5th floor and you want to go down. An elevator with passengers which is heading from the 4th floor up to the 17th floor won't stop, as another elevator already on the way down (or one which is empty and below you) can be sent to the 5th floor more quickly.



I have seen some elevators that will not go opposite the direction of the call button you pushed and will, instead, close the doors and then open them again if the floor you select inside is in the opposite direction of the call button. They will then cancel your floor selection and you have to hit it again.

Answer 6

I believe it is so that the elevator that stops for you is going in your direction. (EG: you press down arrow, so an elevator on the way down stops for you.)



This would save time because you don't have to go up, down, up, down, etc. To get to a lower/higher floor.



But you say that they do the opposite sometimes, so I'd like to know if I am wrong...