求翻译：本文是基于PLC和WinCC来对火电输煤进行监控系统的设计，首先对火电输煤的实际应用与意义、可编程控制器PLC技术、监控组态软件WinCC进行了介绍；接着介绍了设计的总体方案以及系统的硬件配置；其次介绍了下位机PLC控制系统与上位机WinCC监控画面的设计，下位机PLC采用西门子S7-200系列，用STEP 7 MicroWIN软件来编程控制，而上位机采用西门子的WinCC组态软件来进行界面设计与监控；最后通过OPC方式来实现上位机与下位机的通信，进行了整体调试运行，使系统能够稳定的对火电输煤工作过程进行监视和控制。是什么意思？

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