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Abstract
The elevator has a broad application in the national economy and life. Elevator has become
one of the important transport equipment. From the traditional domestic elevator control relays,
contactors composition. It is not only the existence of poor reliability, high cost and high failure
rate and other shortcomings, but also with the number of layers increases, changes to the
manufacturing and installation of wiring inconvenience.
Four-elevator as the control object of the simulation and control system of elevator.
Implementation of the elevator with PLC control. The subject of design tasks is controlling four
elevators with programmable logic controller (PLC) and achieve all the control requirements.
The subject of design thinking is the random logic control theory, according to its own elevator
control law in response to random external call signal. The design analysis and discussed the
whole process of program design with FX2N PLC controlled model elevator, and described three
main areas: control of the system requirements, system configuration, software design.
Key words:PLC control system; elevator; relay; contactor