This paper introduces the system composition and productive technology process of the program control de-vice of the soot-blowing of the boiler of the thermal power plant.In addition,it describes the hardware composition, main functions and the design of the control software of the control system of the PLC and the upper computer.%介绍火电厂锅炉吹灰程控装置的系统组成和生产工艺流程，PLC加上位机控制系统的硬件构成、主要功能和控制软件的设计。
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