基于 PLC 的火电厂输煤控制系统摘要：文章介绍了火力发电厂输煤控制系统特点，火力发电厂输煤 PLC 控制系统的结构、功能和操作方式。PLC 在火力发电厂输煤控制系统应用的实践证明：PLC 是实现火电厂热工自动化的理想控制器，PLC 不但能完成复杂的继电器逻辑控制，而且能完成模拟量控制及智能控制，并能实现远程通讯、联网、上位机监控等。关键词：火力发电厂；输煤控制系统；PLC；MCGSAbstract: This article introduces the characteristic of control system of thermal power plant coal, thermal power plant coal handling control system PLC structure, function and operation way. PLC in the thermal power plant coal handling control system application of practice has proved: PLC is the realization of thermal process automation of power plant the ideal controller, PLC not only can complete complex relay logic control, and can complete the analog control and intelligent control, and can realize the remote communications, networking, computer monitoring.Key words: power plant; coal handling control system; PLC; MCGS目 录1 S7-200 西门子 PLC 概述..............................................................................................................31.1 S7-200 PLC 的结构及技术性能......................................................................................31.1.1 S7-200 CPU 的结构........................................................................................31.1.2 S7-200 CPU 22X 的电源.....................................................................................51.1.3 S7-200 的工作方式.............................................................................................61.1.4 S7-200 CPU 22X 的输入/输出接口...................................................................81.1.5 S7-200 CPU 的扩展模块......................................................................................91.2 S7-200 PLC 的寻址方式及内部数据存储区...........................
