"基于三菱FX2N系列PLC的自动售货机控制设计详解"

This thesis is based on Mitsubishi PLC FX2N series monitoring system for vending machines. The author discusses the origin and development of vending machines, as well as their current status in both domestic and international markets. The dissertation also provides an overview of PLC's basic components, characteristics, and working principles. It further elaborates on the detailed design process of the vending machine system using the Mitsubishi FX2N series PLC. The paper thoroughly introduces the hardware components of the vending machine and provides a complete PLC external connection diagram. For the PLC ladder diagram programming, the author utilizes specialized software designed for Mitsubishi PLC ladder diagram programming. The basic principles and working procedures of the vending machine are presented, followed by a breakdown of the transaction process into several program blocks, each of which is individually programmed. The role of programmable logic controllers (PLCs) in vending machines is explained in detail. The program covers various processes of the vending machine's operation. The utilization of PLC control in the vending machine system enhances system stability and ensures long-term operation. By employing PLCs, the vending machine system can operate reliably and continuously. The key terms associated with this research include vending machine, sequential function chart, ladder diagram, and I/O point assignment. In summary, this thesis provides a comprehensive analysis and design process for a vending machine control system based on Mitsubishi PLC FX2N series. It covers the hardware components, PLC programming, and the overall operation of the vending machine. The implemented PLC control system improves the stability and reliability of the vending machine, allowing for its long-term operation.