The rapid development of information technology and the wide application of embedded system have brought revolutionary changes to people's life. The combination of embedded system and Internet has become a trend of the future. Therefore, an embedded Web server is designed. This server uses hyper text transfer protocol and common gateway interface technology, increases database function. In the client, users can monitor local devices and admin historical data through Internet and browser remotely. The use of OPC technology achieves communication between the Web server and PLC. This monitor system can not only meet the needs of supervisory task, reduces the operation and maintenance cost, but also improves the efficiency. The system is of a very high value in use.%信息技术的高速发展和嵌入式系统的广泛应用给人们的生活带来了革命性的变化,嵌入式系统接入Internet成为未来的一个趋势.因此,本文设计一个嵌入式Web服务器,服务器端采用HTTP协议和CGI技术,增加了数据库功能,在客户端的用户可以通过Internet利用浏览器进行远程监控并且可以查看历史数据.利用OPC技术实现了Web服务器与PLC之间的数据通讯.这种监控系统不仅满足了监控任务的需要,而且有效降低了运行维护成本,提高了运行效率,具有很高的使用价值.
展开▼
