As the Industrial Ethernet and TCP/IP protocol being widely applied in industrial automation,it is possible to access PLC data by a web page.SIEMENS S7-web2plc also supplies a specialized data accessing interface for this application.Focusing on Simatic PLC and the single drum pneumatic cut-tobacco feeding machine with WEB tech,it details Human-Machine Interaction and monitoring by WEB Browser for a concise,flexible and low-cost supervisory control system.This method simplifies the structure of control system,reduces local operation stations,supplies a new method for monitoring variables,and provides a path for remote diagnoses via Internet.%工业以太网和TCP/IP协议在工业自动化领域的大量应用,为以网页的方式访问PLC数据提供了条件,西门子S7-web2plc更是为这种方式提供了专门的接口。为寻求一种简约灵活低成本的监控方式,借助WEB技术,以SIMATIC PLC和单旋鼓风力喂丝机为对象,阐述了以WEB浏览器为界面实现人机交互和设备监控的方法。该方式简化了控制系统结构、减少了现场操作站数量,并为后期修改监控变量以及INTERNET远程诊断提供了途径。
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