| This paper initially introduces the structure and function of the programmable logic controller (PLC), as well as the structure of automatic industrial washing machine. Then it analyzes and studies how the automatic washing machine control system works. Based on its working principle, it designs the automatic washing machine control system with PLC as the core components.Then, in the light of six working process of automatic washing machine,it enhances its feasibility of system control programming, including PLC and peripheral equipment selection, programming mode selection and variety of anti-interference measures, by analysis and induction. Finally, it designs a control system of automatic industrial washing machine with Siemens S7-200 series PLC, containing the I/O port assignment, PLC wiring diagram and PLC programming. It as well analyzes, in details, the control process of programming which achieves high level of automation for the washing process, featured by substantial level of intelligence in accordance with safety, reliability, convenience and flexibility. |
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