"基于西门子 S7-200PLC的六层双部并联电梯控制系统设计与实现"

The undergraduate thesis "PLC design for a six-storey dual-parallel elevator" focuses on the structure, functionality, and PLC control of a six-storey elevator model using Siemens S7-200PLC. The I/O interface allocation and program design for the elevator system are discussed. Through the design of the control system process for the six-storey elevator, various control performances such as door opening and closing operations, call prompts, up and down movements, starting, 2-second delayed door closing, leveling parking, car door opening, and signal prioritization are achieved. The programming software is written, hardware is installed, and comprehensive debugging is carried out with the six-storey dual-parallel elevator model to ensure its smooth operation. Two Siemens S7-200PLCs are used as controllers, alternating and communicating with the computer to integrate into the elevator control system. MCGS configuration is used as the upper computer to monitor elevator operation, provide fault alarm, and real-time data storage. The main functions implemented include dual-parallel control, 2-second door open duration control, door opening outside the current floor, 2-second door closing delay after the door is fully open, opening the door using the button, changing station parking, car lighting control, floor display character setting, display screen, overload protection, door gap protection, up and down floor indication, pulse width modulation (PWM). The keyword for this thesis includes Siemens S7-200PLC, six-storey elevator, dual-parallel, MCGS configuration, pulse width modulation.