【正文】 報(bào)警模塊不論軟件工作在何種方式下，一旦出現(xiàn)超值，系統(tǒng)確認(rèn)后并發(fā)出報(bào)警，屏幕上顯示報(bào)警內(nèi)容和地點(diǎn)，以便采取措施。 人機(jī)界面：最簡單的人機(jī)界面是指示燈和按鈕，目前液晶屏（或觸摸屏）式的一體式操作員終端應(yīng)用越來越廣泛，由計(jì)算機(jī)（運(yùn)行組態(tài)軟件）充當(dāng)人機(jī)界面非常普及。 ⑵ BAF 生物濾池 PLC 控制及檢測部分 廠內(nèi) 2BAF生物濾池 PLC子站位于變電所低壓配電室控制室內(nèi)。 Hardware disposition。 Digest this article mainly introduced PLC in the city sewage treatment concrete application example, the system introduced the city sewage treatment technical process as well as based on SIEMENS S7400 the series PLC sewage treatment implementation plan, introduces the city sewage treatment plant supervisory system data acquisition the programmable controller was PLC is the grand total puter technology, the automatic control technology and the munication one kind new, the general automatic control device. Now the programmable controller already became importantly, most reliable, the application situation most widespread industry control has the function strong, the reliability high, the use nimble convenient, easy to program as well as the adaptation industry environment and s o on a series of order to enhance the sewage treatment plant the movement management level, PLC has also bee one of this system important position units, in this system various units according to certain topology interconnection constitution sewage treatment plant control system. Key word sewage treatment。 PLC系統(tǒng)將根據(jù)軟件程序自動(dòng)控制螺旋輸送機(jī)、回轉(zhuǎn)式粗格柵機(jī)的順序啟停、運(yùn)行、停車以及安全連鎖保護(hù)，格柵機(jī)停機(jī)后延時(shí)停螺旋輸送機(jī)。 % 電流177。在手動(dòng)方式下可固定監(jiān)視畫面并可顯示歷史趨勢圖等。系統(tǒng)初始化的一些工作放在初始化子程序中完成，這樣可節(jié)省掃描時(shí)間。 對于一個(gè)自動(dòng)化工程 (特別是中大規(guī)?？刂葡到y(tǒng) )來講，選擇網(wǎng)絡(luò)非常重要的。 該子站模擬量輸入、輸出，數(shù)字量輸入、輸出點(diǎn)數(shù) AI:14 AO:3 DI:124 DO:134 沉砂池和沉淀池 沉砂池和沉淀池定時(shí)開 /停排砂、排泥閥，砂水分離器設(shè)備控制由設(shè)備廠商自帶可設(shè)定控制系統(tǒng)，砂水分離器應(yīng)與排砂閥聯(lián)鎖。 PLC 在污水處理中的部分運(yùn)用 中央控制室 中央控制室可對整個(gè)