Vending Machine Design Based on PLC Control
Abstract : The design of the traditional vending machine using AT89S51 as the control core, which consumed on the input and output interfaces largely, and was broken easily at the overpressure. The scheme of a vending machine control system based on Siemens S7-200 Programmable logic controller (PLC) as the main controller was proposed vending machine adopts PLC control system are described, and the PLC controller, input part includes pay refund coin selector switch, merchandise selection switch, sensors, output part includes all kinds of lights, motor back currency, goods shipment motor and alarm etc. Finally using the simulation software simulates the process of vending machine and achieves the desired effect. Using PLC control of the vending machine can enhance the stability of the system, and ensure the vending machine long-term and stable operation.
Key words :PLC;Vending machines;Simulation;Control system
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