【摘要】 将Internet技术和嵌入式技术结合起来,实现了一种利用Web浏览器控制西门子MM440变频器运行的方法。硬件电路采用LM3S8962微控制器和外围数/模转换及开关量控制模块。软件设计包括以下几个方面:移植与配置实时操作系统μC/OS-Ⅱ和嵌入式TCP/IP协议,设计HTTP服务器主程序、数模转换模块程序及开关量控制程序。用户端只需使用浏览器就能实现变频器的启动、停止和频率设定等功能。更多还原

【Abstract】 A method for controlling Siemens MM440 inverters through a Web browser was implemented by combining Internet and embedded technologies.The hardware circuitry adopts the LM3S8962 microcontroller as well as peripheral DAC and on/off control modules.The software design is composed of the following parts: migrating and configuring the μCO/S-II real time operating system and the embedded TCP/IP;designing the HTTP server,DAC module and on/off control programs.Inverter operations such as start,stop and frequency setting can be performed on the user side simply through a browser.更多还原