ROSH elevator group control system is designed based on centralized group control technology. A group controller is used to realize the registration and the allocation of the hall call. CAN-Bus serial communication between the group controller and the elevator's main controller ensures high speed and reliable transmission of massive data. A group controller board mounted with LED indicators, allows us to monitor the communication effectiveness between the group controller and the elevator's main controller, as well as the connection of the input ports. ROSH elevator group control system can manage a maximum of 8 elevators and 48 landings, allowing a wide range of applications.
After energized, the main controller of individual elevator will send the hall call button signal to the elevator group control system. The registered hall call signal will then be sent to the landing/indicator board of every floor to acknowledge a landing call and light the call button. If any of the main controllers loses power, the group controller will directly communicate with the call/indicator board, ensuring that the elevator continues to work efficiency under group control.
According to the SHORTEST WAITING TIME principle, and considering the distance between the floors, registration status of hall call and car call, by-pass status, reversal running, etc., the elevator group control system performs an effective real allocation of the hall call signal. The system will choose the elevators with the fastest response, thus the transportation capability can be fully excavated and the elevator operation efficiency significantly improved.
If the elevator group control system identifies an elevator which keeps the door open after receiving the allocated hall call signal for long time, the system will cut off that elevator and reallocate the hall call signals, ensuring the shortest waiting time for the passengers.
In case that the elevator group control system is broken down, under maintenance, or power off, every single elevator will keep simplex running, and automatically return to the group control mode after the group controller is restored.
To meet different requirements and enhance the operation efficiency, the elevator group control system may offer multiple functions.
To enhance the transportation ability for main floor when there is no elevator at the main floor, the elevator group control system will allocate the unallocated elevator that will reach the main floor most easily.
Disperse car waiting mode starts when all the elevators under the elevator group control system are idle for more than one minute. The system will allocate one elevator which will reach the main floor most easily to the main floor waiting with the door closed, if there is no elevator at the main floor or below. The system will allocate one elevator which will reach the higher level floors most easily to the higher level floors waiting with the door closed, if there are two or more elevators in normal use, and there is no elevator at the main floor or below.