SIEMENS SIMATIC S7-300 PLC在锅炉计

本文主要讨论了西门子S7-300 PLC 在神马实业锅炉计算机监 控系统中的应用，该系统由PLC 来完成数据的采集、运算、回路调节， 与上位机通信等功能。本文给出了这个系统的主要硬件构成和软件功 能的实现方法。

关键字：锅炉、PLC、监视和控制、上位机

Abstract: This paper describes the application of Siemens S7-300 PLC in a computer monitoring and controlling system of Shen Ma Industrial Co., Ltd boiler，which uses PLC to complete the processing of data collecting， data processing, and the communication between upper computer and PLCs. The paper gives out the hardware structure of the system， the function of the system , especially introduces the way of software programming.

Keywords：boiler PLC monitoring and controlling upper computer