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Elevator Control Cabinet

Advantages

Elevator Control Cabinet Introduction

 
The elevator control cabinet is the device to control the operation of the elevator. It is usually installed in the control room. Our elevator control cabinet supports simplex control, duplex control, group control, and remote monitoring functions, etc. The electric motor drive of some type of the elevator control cabinet adopts VVVF(Variable Voltage Variable Frequency) system. The elevator speed can be adjusted continuously. The color of the elevator control cabinet can be chosen with one's preference, with available color of dark grey, blue, light grey or customer-made.


Product Type

 


The development of elevator control cabinet

 
Elevator control cabinet installed in the traction machine next to the elevator is the electrical equipment and signal control center.
1.In the early control cabinet, there were contactors, relays, capacitors, resistors, signal relays, power transformers and rectifiers, etc.
2.With the development of computers and electronic technologies, elevator control cabinets became smaller and smaller and their functions became more and more powerful.
3.The current control cabinet is generally composed of plc and inverter; however, there are some elevators with computer board control. PLC is actually a computer, mainly used for industrial field control. In some special circumstances, PLC performance more stable than the computer board. The level of modern elevators depends mainly on the advanced nature of the control cabinet.It reflects the size of the elevator function, the level of reliability and advanced level of intelligence.


Product Structure

 

The main functions of the control cabinet are: operation control and drive control.

Operation control
1.The call signal input and output processes and answers the call signal and starts the operation.
2.By communicating with passengers via registered signals, when the car arrives on a floor, car and direction of travel information is provided via visual signals of ringing and direction of arrival.
 
Drive control
1.According to the command information of operation control, it controls the car's start, acceleration (acceleration, speed), running, deceleration (deceleration), leveling, parking and automatic re-leveling.
2.Make sure the car is safe and reliable.
 

Control cabinet settings

 
1.General to enhance the height of the elevator below the average speed of the control cabinet of a ladder. It encompasses all the control and drive components.
2.Large lifting height, high-speed elevators, machine room elevators because of the hoisting machine power supply voltage is high, it is divided into signal control and drive control cabinet.
3.Group control ladder group dispatching has a special group dispatching dispatcher, there is no special group dispatching dispatcher, such as OTIS production without a special group control cabinet.
 

NICE3000+ Basic Connection Diagram Standard 40-Floors Full Collective



 


What are the main functions of the elevator control system

 

1.Floor Height Data Automatic Correction

Each time the elevator passes through the leveling position, system will auto correct the error position with respect to the shaft parameter self-learn position data base to maintain consistent ride comfort.

2.Elevator Position Auto Calibration

Each time the elevator enters the terminal floor zone, system will self-calibrate the position counter with respect to the 1st slowdown limit switch so that elevator over travel operation will be eliminated.

3.Preset-able Hall Display

Allows user to preset every floor display with additional number (0-9) or character (A-Z) for non-standard display.

4.Cancellation of Unintended Car Call

Passenger needs to press the unintended floor button twice to cancel the false call.

5.Reverse Command Cancellation

When elevator travel to the terminal top or bottom floor, system cancel all the car calls registered for the reverse direction operation.

6.Full Load By-pass

When the elevator load exceeds the full-load set value, (generally >80% load capacity) the elevator will not respond to hall calls when passing floors. However, during this event hall calls can still be registered; they will be serviced on the travel (simplex), or by other elevator service (duplex or group control)

7.Anti-Nuisance Function

System identifies the number of passengers in the car and automatically compares the number of passengers with the number of instructions registered in the car. If an excessive number of calls are registered, then the system considers it is nuisance status and cancels all the car calls/ The passengers need to re-register the desired calls again.

8.Overload Protection

When the elevator is at stationary and the load capacity excesses the rated load capacity, buzzer will sound together with the overload light on. Elevator will halt until overload alarm is trigger off.

9.Duplex Control

It needs only 3 wires to set up without the needs of group controller board.

10.Group Control

Group control with less than 8 elevators is based on fuzzy logic control theory.

11.Independent Mode

Elevator does not respond to any hall calls and closes the door automatically.

12.Reversal Running Protection

Systems continuously monitor the encoder direction via “AB” phase. System will stop immediately when wrong direction is detected, brake will be applied and system will trip on level 5 fault code.

13.Anti-slip Protection

Systems continuously monitor the speed of the elevator via “AB” phase. System will stop immediately when no speed feedback from the cage, brake will applied and system will trip on level 5 fault code.

14.UP/DOWN Over-Speed Protection

The over-speed detector gives an assurance that the speed of car cannot exceed the range of secure speed, thereby guaranteeing the safety of both passengers and cargo.

15.Output Contactor Monitoring

By monitoring the drive output current state, system can determine whether the output contactor circuit is abnormal before release the motor’s brake.

16.Encoder Fault Protection

System uses a high-speed encoder for close-loop vector control. If the encoder fails, the system stops automatically to prevent a runaway failure.

17.Optimum Velocity Profile Generator

The lift controller will optimize the velocity profile based on the desired travel distance and auto-generate velocity profile to achieve direct-to-floor landing.

18.Time-Sharing & Peak Service

Flexible setting of the time-sharing service time period and the corresponding time-sharing service floors.