基于PHP与COM技术的工业PLC监控系统实现技术

Industry PLC Telemonitoring Technology Based on PHP and COM

传统上位机与PLC的通信方式常采用基于C/S架构的软件设计方法,联网监控实施复杂且成本高。介绍了基于Web技术与现场PLC进行远程通信与监控的一种方法,详细介绍了PHP与COM技术应用于该过程的具体实施步骤,实现了B/S架构在工业现场控制和监视中的应用,具有成本低廉、通信可靠的特点。

Traditionally, a software design method based on C/S architecture is adopted to realize the communication between host computer and PLC, and it is not only difficult but also expensive to monitor the PLC by network. This article describes another method based on Web technology for remotely communicating and monitoring PLC, and detailed introduce the implementation step which used PHP and COM technology. This method achieves the application of software based on B/S architecture on industry field, and has such chatateristics as inexpensive, reliable etc.