Elevators & Escalators
Quality in Motion
History of the Elevator Mitsubishi Monumental Elevators Elevator Structure and Equipment Basic Operations Emergency Operations Systems Special Features Glossary
Elevators
Basic Operations
Group Control Operations
Fully Automatic Group Control Operations (AI-22, AI-2200C)
AI-22 and AI-2200C provide for fully automatic operation where multiple cars operate at an optimum level through application of advanced artificial intelligence technology.
Elevator operation as described below:
Operation Button Arrangement
Up Hall and Down Hall Call Button are provided in each hall. (Highest floor: Down Hall Call Button only; Lowest floor: Up Hall Call Button only.)
Car Buttons are provided on Car Operating Panel inside each car.
(1) Pressing a Hall Call Button registers a Hall Call, and the optimal car (i.e., the most logical car based on quickest possible response given current car locations and registered call conditions) will be allocated to the call. In the case of a AI-2200C equipped with the Immediate Prediction Indication function, the Hall Lantern will light and a single tone Car Prediction Chime will sound to inform the passenger which car will serve the call.
(2) When the controller has determined to stop the car, the double tone Car Arrival Chime will sound while the Hall Lantern (if installed) flashes to inform the passenger that the car will soon arrive.
(3) Pressing a Car Button in the car registers a Car Call, and car will respond to the Car Call, as well as Hall Calls assigned to the car, one after another.
(4) If there are no more Calls after response to all Calls, then car will park at the last-served floor with doors closed.
(5) Each time a new Hall Call is registered, the optimal car for the service will be automatically determined.
(6) The microcomputer performs optimum prediction control, and cars will be allocated in the most efficient ways to cope with the traffic patterns that change continually throughout the day. (Optional feature for AI-2200C only.)
Special Features
Strategic Overall Spotting (Distributed Parking)
When traffic slows within an entire building, cars will be distributed to upper, middle and lower areas of the building, and will park at floors with car lighting and ventilation fans automatically turned off to save energy.
Up Peak Service
Traffic from the main floor (*1) may intensify during certain times such as morning commute. In such cases, multiple cars will be allocated to the main floor to increase transportation capacity.
*1 Main floor: Floor(s) with heaviest traffic, such as main lobby. One car can be designated to service multiple main floors.
Down Peak Service
Traffic to the main floor intensifies during a certain time period (such as work quitting time), the downward transportation capacity will be increased to minimize the bypassing of Hall Calls due to full car loads.
Lunchtime Service
During the first half of lunchtime, calls moving in the direction of restaurant floors will be prioritized. During the latter half of lunchtime, traffic flow will be predicted, and details such as the number of cars to be allocated to restaurant floors, timing allocation for each car, and timing of door opening and closing will be controlled based on the predicted traffic data.
Passengers must press Hall Call Button and Car Button. Other operations are automatic.
Destination Oriented Prediction System
In the case of AI-2200C-equipped elevators that include the optional Destination Oriented Prediction System (DOAS), main floor hall equipment and operating procedures differ from systems not equipped with DOAS. Passengers can select destination floors using the Hall Operating Panel while waiting for cars in the main lobby.
Main Floor Equipment for DOAS
Item Function
Hall Operating Panel Consists of Destination Floor Buttons and Car Number Indicators that show which car will serve each Hall Call.
Destination Floor Indicator Indicates floors where car will stop.
Hall Lantern Works with the Car No. Indicator.
Procedures for Main Floor Operation (*1)
*1 Main floor is defined as the primary floor with heaviest traffic, or a floor designated by the customer.
*2 The call will be registered as a Hall Call and the optimal car will be allocated immediately. At the same time, the allocated car number will appear on the Car No. Indicator of the Hall Operating Panel. The Car No. Indicator is mounted on the upper area of the hall, immediately below the Hall Lanterns. The Destination Floor Indicator, if provided, indicates the floors where the car will stop.
*3 The destination floor is registered from the hall, and the passenger need not press the Car Button after boarding the car.
Operating Procedures for Floor other than Main Floor
Same as for those without DOAS.

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