本文介紹了利用西門子公司的S7-224 型PLC，來實現含氧化鐵雜質的污水凈化處
理系統的自動控制，本文詳細介紹了系統的硬件配置以及軟件設計流程圖，并且介
紹了編程中的關鍵問題。
關鍵詞：PLC 污水凈化處理系統順序功能圖 故障診斷 硬件配置 編程方法
競爭調度算法
Sewage treatment control system design based on PLC XIAO Zuo-wu1 CHEN Xiao-zhu2 XIAO Ai-wu3 （1. zhuzhou Professional Technology College, Zhuzhou 412001,China
2. zhuzhou Professional Technology College, Zhuzhou 412001,China 3．Hunan Chemical Professional Technology College,Zhuzhou 412004,China) Abstract: This paper introduced a method of automatic control system design which decontaminate sewage carried with Oxidized iron impurity ,control system based on PLC type of S7-224 belong to Siemens company. in this paper the system's hardware and software is also introduced in detail.
Keywords: PLC; sewage treatment system; sequential function chart; Break down diagnosis;
hardware; programming-skill; competition adjusting calculate way