Elevators & Escalators
Quality in Motion
Elevator Group Control System ΣAI-2200C
Smart & User Friendly  ΣAI-2200C

Intuitive & Comfortable

Comfortable elevator operation and ride under ever-changing usage conditions – that's the concept realized with the ΣAI-2200C group control system from Mitsubishi Electric. Incorporating the latest advancements in fuzzy-logic, this system utilizes intuitive control to provide smooth operation and a stress-free ride. The moment a hall call button is pressed, the optimal car to respond to the call is selected based on factors such as waiting time, travel time, current car occupancy and energy consumption, and the Immediate Prediction Indication feature is simultaneously activated to reduce user irritation generated when waiting for the car to arrive.
Behind all this are Mitsubishi Electric's cutting-edge technologies, designed to add vitality and dynamism to building functionality.

Touchless screen hall operating panel for DOAS

Group Control Technology (Video)
Group Control Technology (Video)

Group Control Solution (Video)
Group Control Solution (Video)

DOAS -Easy for anyone to use- (Video)
DOAS -Easy for anyone to use- (Video)

  Brochure (4.6MB)

ΣAI-2200C — A Comfortable Elevator Journey in Today's Complex Buildings

Key Benefits of  ΣAI-2200C

Less travel time
In addition to reduction of waiting time, this group control system reduces travel time (from boarding a car to arriving at a destination floor) by individualized car allocation.

More flexible car allocation
Traffic conditions in a building change constantly. This group control system has a function to allocate the cars flexibly in response to the traffic conditions by sending the cars to a congested floor during periods of heavy traffic.

Less irritating
This group control system evaluates not only actual waiting time but also psychological waiting time by assessing the probability of full-load bypass and prediction error, etc. The optimal car allocation based on the evaluation minimizes irritation of all passengers.

Less waiting time
ΣAI-2200C reduces not only passengers' waiting time but also long-wait. The longer passengers wait for a car, the more they become irritated.

More building space
Destination Oriented Allocation System (DOAS) increases handling capacity. Compared to the conventional control system, DOAS allows reduction in car size and hoisting area. The space saved can be used effectively for other building facilities.

More energy-saving
With Mitsubishi Electric's smart control technology, when a passenger presses a hall call button, the system selects the elevator that best balances operational efficiency and energy consumption. Selection is based on each elevator's potential energy consumption according to its current location and passenger load.

Making elevators more friendly for all

Total Evaluation Factors for Best Car Allocation

• Your waiting time or an increase in waiting time throughout the building

• Expected travel time

• The possibility of a car being bypassed due to a full load

• The possibility of long waits caused by future calls

• Energy consumption

Determine the optimum car



Cutting-edge Technologies for Allocation Control

Cooperative Optimization Assignment

Forecasting a near-future hall call to reduce long waits

When a hall call is registered, the algorithm predicts a near-future call that could require long waits. Through evaluation of the registered hall call and the forecasted call, the best car is assigned. All cars work cooperatively for optimum operation.

Cooperative Optimization Assignment

Energy-saving Operation — Allocation Control (ESO-W)

Maximizing operational efficiency and minimizing energy consumption

This system selects the elevator in a group that best balances operational efficiency and energy consumption. Priority is given to operational efficiency during peak hours and energy efficiency during non-peak hours.

Car allocation that maximizes operational efficiency does not necessarily translate to energy efficiency. A car uses energy efficiently when it travels down with a heavy load, or up with a light load. Accordingly, if multiple cars have the same traveling distance, this system chooses the car that requires the least energy.

Through a maximum 10% reduction in energy consumption compared to our conventional system, this system allows building owners to cut energy costs without sacrificing passenger convenience.

Energy-saving Operation — Allocation Control (ESO-W)

Initial conditions: non-peak period
Car A: Parked at the 3rd floor
Car B: About to leave the 9th floor with several passengers
Car C: Parked at the 9th floor
Car D: Parked at the 1st floor
Under the conditions above, when a hall call is registered at the 6th floor to go to the 1st floor,
waiting time and traveling distance will be the same regardless of whether car A, B or C responds to the call.

In response to the call, the cars will operate in the following ways:
Car A will travel up with no passengers and then down with only one passenger (requires more energy than car B).
Car B will travel down with more passengers than car A (requires the least energy).
Car C will travel down with no passengers and then down with only one passenger (requires the most energy).

Car selection
During non-peak hours when energy efficiency is prioritized, car B is selected.

Dynamic Rule-set Optimizer (DRO)

Selects optimum car allocation through "rule-set" simulation

The neural network technology has enabled the system to continually and accurately predict the passenger traffic within intervals of several minutes. A high-speed reduced instruction set computer (RISC) runs real-time simulations using multiple rule-sets and the predicted passenger traffic to select the rule-set which optimizes transport efficiency.

Simulation example and performance results of each rule-set
The diagram below shows an example during a morning up peak time. An ideal rule-set is selected every few minutes according to the predicted traffic conditions.

Dynamic Rule-set Optimizer (DRO)

User-friendly Solution: AIL (Immediate Prediction Indication)

User-friendly Features

Immediate Prediction Indication (AIL)

Easing stress of waiting at elevator hall

When a passenger has registered a hall call, the designated car is selected and the corresponding hall lantern immediately lights up. To inform the passenger of the car arrival, the hall lantern flashes on and off for three seconds before the arrival.

Immediate Prediction Indication (AIL)

[Without AIL]
Passengers wait for cars wondering which car will arrive first.
Without AIL
[With AIL]
As passengers can see which car arrives next, they have enough time to reach
the car even when carrying large baggage.
With AIL

Second Car Prediction (TCP)

Reducing passenger congestion

Second Car Prediction (TCP)
Passengers tend to gather around the allocated car especially in heavy traffic like the morning time in an office building.
The hall lantern of the second service car also lights up to disperse the passengers for smooth boarding.

Automatic Hall Call Registration (FSAT)

Enhancing user convenience

Automatic Hall Call Registration (FSAT)
If a passenger cannot get into an allocated car due to a full load, he/she needs to press the hall button again.
If a fully loaded car leaves a floor, a hall call is registered automatically.

*: This feature is also applicable to operation systems other than ΣAI-2200C.

Car Arrival Chime - Hall (AECH)

Signaling car arrival by sound

Car Arrival Chime - Hall (AECH)
An electronic chime at the elevator hall indicates that a car will soon arrive.

*: This feature is also applicable to operation systems other than ΣAI-2200C.

Voice Guidance System (AAN-G)

Reassuring passenger safety

Voice Guidance System (AAN-G)
Voice guidance supports passenger safety and peace of mind when entering and exiting a car, in crowded cars and at the time of an emergency.

*: This feature is also applicable to operation systems other than ΣAI-2200C.

Efficiency Oriented Solution: DOAS (Destination Oriented Allocation System)

More Efficient, More Comfort

Destination Oriented Allocation System (DOAS)

Passengers register their destination floor using a hall operating panel before entering the elevator, eliminating the need to press the button inside the car. Furthermore, dispersing passengers by destination prevents congestion in cars and minimizes waiting and travel time.


Key Benefits of DOAS

Enhanced Convenience

[At elevator halls]
Enhancing usability for passengers at halls
Without DOAS
Passengers wait for cars wondering which car will arrive first. Once a car arrives, regardless of the destination, passengers rush to get into the car.
When passengers enter a destination floor at a hall, the hall operating panel indicates which elevator to take. As passengers proceed to the assigned elevator, the car is on its way, and there is no hurry when the car arrives.

[In Cars]
Enhancing passengers' usability in cars
Without DOAS
Passengers need to press the destination floor button on a car operating panel. In a busy car, they have to fight through a crowd of bodies to reach the button.
A destination floor is registered when passengers enter it on the hall operating panel. Relax and enjoy the ride in the car. The car skips unnecessary stops and quickly takes passengers to the destination floor.

Individualized Car Allocation Based on Travel Time

This system evaluates passengers' travel time from registration of a destination floor at a hall to arrival at the destination floor and predicts their waiting time. As this system allocates an optimum car to each passenger on the basis of the predicted waiting time, passengers' travel time can be reduced.

[Evaluating travel time]
Evaluating travel time
Without DOAS
Since not all passengers press an up or down button at the hall, the system cannot evaluate their waiting time and travel time.
Since all passengers register the destination floor on the hall operating panel, the system can evaluate travel time of each passenger and allocate the optimum car for the passenger.

[Reducing travel time]
Reducing travel time
Without DOAS
Cars make stops at every selected floor because destination floor is not considered for car allocation.
The individualized car allocation based on the destination floors leads to shorter travel time and fewer intermediate stops.

Compared to conventional operation systems without DOAS, this system reduces the average waiting time at the time of congestion and long-wait.


Signal fixtures for DOAS

Great care is taken in the design and manufacture of each and every elevator
part to ensure a comfortable, user-friendly ride.

Signal fixtures for DOAS

Click link below for details
of signal fixtures for DOAS

Brochure  Brochure (702KB)

Extended Capability:  DOAS (Destination Oriented Allocation System)

More Security

DOAS Integrated with Security Gate

Extended feature for more security

The destination floor can be registered automatically after passing a card over a card reader at the security gate entrance. DOAS integrated with security gates provides a seamless journey and enhances security in the building.

DOAS Integrated with Security Gate

1. Reducing congestion at elevator halls
Our elevator group control system is linked to an access control system, enabling congestion during peak use hours to be reduced through efficient authorization at security gates and optimum car allocation.
Reducing congestion at elevator halls
Without DOASWith DOAS integrated with security gate
[Robust security × Improve operation efficiency]

2. Smooth operation
Smooth operation
Pass a card over the card reader at the security gate.
Check the elevator number displayed on the indicator.
Security gates screen out suspicious persons and block unauthorized access to the elevator hall.
The assigned car is dispatched almost simultaneously with completion of card authentication, reducing passenger waiting time at the elevator hall.

Smooth operation
Proceed to the entrance of the assigned car.
Enter the car when the doors open.
A hall call has already been registered. The passenger does not need to press a hall button. If the passenger forgets or misses the assigned car, a call can be registered again using the hall operating panel.
The destination floor has already been registered. The passenger does not need to press a floor button in the car.

3. Integrating security cards
The ID card for the elevator can be combined with a building security pass, such as an employee ID card, to allow movement in the building using a single card. This integration creates a more convenient building security environment.

Integrating security cards

[System configuration]

System configuration

Please refer to our brochure regarding elevator security solutions for details.
Close collaboration with the security system supplier is required.

More Supportive

DOAS with user support features

Extended features for more supportive operation

Universally designed signal fixtures in elevator halls make elevators more accessible by all people, regardless of their age or ability.

DOAS with user support features

1. Recommended equipment
Touchscreen hall operating panel

Touchscreen hall operating panel

The intuitive LCD touchscreen is highly visible to all, including those who have color vision impairment.
Triangular prism hall lantern

Triangular prism hall lantern

The distinctive protruding shape enables excellent visibility from the side.
Elevator number plate with braille

Elevator number plate with braille

The plate is mounted at an optimum height for braille readers and can be recognized easily by children and wheelchair users.
Car entrance destination floor indicator

Car entrance destination floor indicator

Passengers can check the destination floors when getting into a car.

2. Passenger support features

[Car selection]
This function enables passengers, especially those who have difficulty with mobility or require space such as wheelchair users, to specify the closest or relatively uncrowded car using the panel screen.
Car selection Car selection Car selection Car selection
1. Press the function icon. 2. Choose a car selection method (closest or less occupied car). 3. Register the destination floor. 4. The desired car is assigned.

[Audio guidance]
Audio guidance assists visually impaired passengers to use the operating panel without difficulty.

(1) Voice guidance mode
Voice guidance through the hall operating panel gives step-by-step instructions on how to register a destination floor.
Voice guidance mode Voice guidance mode Voice guidance mode Voice guidance mode
1. Continuously press down on the touchscreen or press the accessibility button. 2. Voice guidance starts. Move the finger slowly on the screen to start announcement of service floors. 3. When you hear the desired floor, touch the screen to register the floor. 4. The assigned car is announced.

(2) Navigating sound
Audible signals are emitted from the hall operating panel and the hall lantern to guide passengers to the proper elevator car.
Navigating sound Navigating sound
1. Hall operating panel continuously emits chime to lead passengers to the panel. 2. After a destination floor is registered, the hall lantern is activated and emits a chime to guide passengers to the proper car entrance.

More closely connected

Elevator Call System with Smartphone

Elevator Call System with Smartphone

Click link below for details.

 Leaflet (606KB)

This smartphone application is designed for users to easily access an elevator equipped with the DOAS Integrated with Security System. Using a smartphone equipped with the application, users can change the call setting for their elevator and check the status of the elevator assigned to them. Once inside the secure area, users can call an elevator remotely from anywhere.
The increased convenience and mobility bring more value to the building.

Convenient & Intuitive
Enhanced Comfort & User Friendly
This smartphone application delivers quicker and easier elevator use through convenient features, including ID Card Call and Smartphone Call for use before and after the security point in the building. The intuitive display design provides users with maximum support.
The smartphone displays the elevator assigned and its current status and alerts the passenger as the elevator car approaches to assist smooth boarding. Additionally, this application allows users to set a call mode for Smartphone Call, for example, to request a wheelchair accessible elevator.
Before the building security point
In the building
This function is an option for elevators equipped with the DOAS Integrated with Security System.
Occupant management is required for this function to confirm the users are in the building. (Users having left the building cannot call an elevator.)


ID Card Call function

When a user takes an elevator from the lobby floor, the user can change the destination floor from the default floor for the ID card by using their smartphone before reaching the security point.
Example: From 1F (lobby floor) to 8F (non-default destination floor)
  • I have enough time to drop by the cafeteria
    on the 8th floor this morning.
    Building security point
    (card authentication)
    Before / After
    The office is on the 5th floor.
    The user runs the application.
  • I have changed my destination
    floor to the 8th floor before
    reaching the security point.
    Building security point
    (card authentication)
    Before / After
  • My elevator
    is A !
    The user can check the elevator status by using Call Status function.
    The elevator displayed on the smartphone goes to the destination (8th) floor.
  • I’m taking the
    elevator A for the
    With the ID Card Call function, a user can change the destination floor from the office floor (default) to another (non-default) on their smartphone before a call for the default floor is registered at the security point, so the operation efficiency will not be compromised. Also, the user can arrive at the destination floor quickly, as registration for the non-default floor on the hall operating panel is not required.

Smartphone Call function

A person who has passed the security point can call an elevator using their smartphone to go to another floor.

Occupant management is required to confirm the user is in the building. (Users having left the building cannot call an elevator.)
Example: From 3F to 7F
  • There is a queue in front of a hall operating panel.
    I’ll call an elevator with my smartphone; otherwise I’ll be late for the next meeting.
    The elevator displayed on the smartphone
    goes to the destination (7th) floor.
  • I can bypass the crowd and make it to the meeting.
    With the Smartphone Call function, a user can get ahead of the crowd in front of a hall operating panel.
    A wheelchair user can call an elevator from their own smartphone without reaching a hall operating panel.
    It also features display of an assigned elevator and the operating status on the smartphones.

The display and operation on a smartphone such as loading time for this system may differ depending on network environment.
This system can be customized according to your needs.
For further information, contact our local sales agent or click Contact Us.