通過(guò)CBNR通訊模塊，可以輕松地完成CONTROLNET控制網(wǎng)絡(luò)的通訊功能。

　　3.3控制室計(jì)算機(jī)

　　控制室計(jì)算機(jī)采用力控組態(tài)軟件來(lái)完成實(shí)時(shí)控制和監(jiān)測(cè)功能。

　　三、控制方案概述

　　 儀表和動(dòng)力設(shè)備均設(shè)有兩種控制方式，即現(xiàn)場(chǎng)手動(dòng)控制方式和集中控制方式，以集中控制方式為主。集中控制主要在值班控制室的PLC控制臺(tái)上由值班操作員進(jìn)行。集中控制方式又分為自動(dòng)控制方式和手動(dòng)控制方式。雖然在中控制室也可對(duì)現(xiàn)場(chǎng)儀表和設(shè)備進(jìn)行必要的直接操作控制，但控制室主要是執(zhí)行管理和監(jiān)督功能和對(duì)重要設(shè)備的運(yùn)行及停止給出允許指令。

　　1 調(diào)節(jié)池控制

　　1.1 進(jìn)入污水處理廠的污水首*入調(diào)節(jié)池，以對(duì)水量和水質(zhì)進(jìn)行調(diào)節(jié)。調(diào)節(jié)池內(nèi)的4個(gè)潛水泵對(duì)應(yīng)有4個(gè)電動(dòng)碟閥。潛水泵和電動(dòng)碟閥的控制分手動(dòng)方式和自動(dòng)方式。在自動(dòng)方式下，當(dāng)調(diào)節(jié)池水位高于75%時(shí)，4臺(tái)潛水泵和其對(duì)應(yīng)的電動(dòng)蝶閥全都起動(dòng)和打開(kāi)。當(dāng)調(diào)節(jié)池水位在50~75%時(shí)，只起動(dòng)3臺(tái)潛水泵并打開(kāi)和其對(duì)應(yīng)的3臺(tái)電動(dòng)蝶閥。當(dāng)調(diào)節(jié)池水位在25~50%時(shí)，只起動(dòng)2臺(tái)潛水泵并打開(kāi)和其對(duì)應(yīng)的2臺(tái)電動(dòng)蝶閥。當(dāng)調(diào)節(jié)池水位在低于25%時(shí)，只起動(dòng)1臺(tái)潛水泵并打開(kāi)和其對(duì)應(yīng)的1臺(tái)電動(dòng)蝶閥。當(dāng)調(diào)節(jié)池水位低于低限設(shè)定值時(shí)潛水泵停泵，電動(dòng)蝶閥全關(guān)。在手動(dòng)方式下，操作員可根據(jù)情況對(duì)每臺(tái)潛水泵和其對(duì)應(yīng)的電動(dòng)蝶閥單獨(dú)操作。

　　1.2 調(diào)節(jié)池的攪拌機(jī)可根據(jù)潛水泵運(yùn)行信號(hào)自動(dòng)起動(dòng)，也可由操作員手動(dòng)起動(dòng)。自動(dòng)起動(dòng)方式下，攪拌機(jī)可分組起動(dòng)或全部起動(dòng)。手動(dòng)起動(dòng)方式下，每臺(tái)攪拌機(jī)均可單獨(dú)操作。

　　1.3 流量計(jì)FI-101增加進(jìn)水流量累計(jì)軟功能塊，對(duì)進(jìn)水流量進(jìn)行累計(jì)，數(shù)據(jù)存在監(jiān)控計(jì)算機(jī)的數(shù)據(jù)庫(kù)中，可隨時(shí)調(diào)用和打印。

　　2 細(xì)格柵間與沉砂池的控制

　　2.1 細(xì)格柵間設(shè)回轉(zhuǎn)式機(jī)械格柵2 臺(tái)（1用1備）。細(xì)格柵間前后各裝有啟閉機(jī)和液位差計(jì)。去渣設(shè)備可根據(jù)液位差（如大于某設(shè)定值）或定時(shí)自動(dòng)起動(dòng)，也可由操作員手動(dòng)起動(dòng)。

　　2.2 沉砂池的行車(chē)式刮砂機(jī)和砂泵可根據(jù)設(shè)定的時(shí)間自動(dòng)同步運(yùn)行或由操作員手動(dòng)控制運(yùn)行。當(dāng)刮砂機(jī)在池上往返運(yùn)行一個(gè)來(lái)回后，刮砂機(jī)和砂泵自動(dòng)停機(jī)。

　　2.3 流量計(jì)FI-102增加進(jìn)水流量累計(jì)軟功能塊，對(duì)進(jìn)水流量進(jìn)行累計(jì)，數(shù)據(jù)存在監(jiān)控計(jì)算機(jī)的數(shù)據(jù)庫(kù)中，可隨時(shí)調(diào)用和打印。

　　3 初沉池及配水井的控制

　　3.1 初沉池配水井有3個(gè)啟閉機(jī)，2個(gè)啟閉機(jī)分別控制到2個(gè)初沉池的進(jìn)水，第3個(gè)啟閉機(jī)控制跨越初沉池的旁路。

　　3.2 初沉池裝有液位計(jì)，以指示其液位變化。當(dāng)液位超過(guò)設(shè)定的上，自動(dòng)打開(kāi)啟閉機(jī)將水送入對(duì)應(yīng)的A/O生化反應(yīng)池。

　　3.3 刮泥機(jī)的運(yùn)行狀態(tài)由PLC進(jìn)行監(jiān)控。刮泥機(jī)可自動(dòng)或手動(dòng)運(yùn)行。

　　4 廠區(qū)排水泵池的控制

　　4.1 廠區(qū)排水泵池的控制分手動(dòng)控制方式和自動(dòng)控制方式。

　　4.2 在自動(dòng)控制方式下，當(dāng)廠區(qū)排水泵池水位在50~75%時(shí)， 起動(dòng)一臺(tái)排水泵。當(dāng)廠區(qū)排水泵池水位在75%以上時(shí)，起動(dòng)另一臺(tái)排水泵。

　　4.3 當(dāng)廠區(qū)排水泵池水位回落到75%以下時(shí)，停一臺(tái)排水泵。當(dāng)廠區(qū)排水泵池水位回落到50%以下時(shí)，停另一臺(tái)排水泵。

　　4.4 在手動(dòng)控制方式下，操作員可任一排水泵的起、停。

　　5 A/O生化反應(yīng)池與鼓風(fēng)機(jī)的控制

　　5.1 每座生化反應(yīng)池分五個(gè)廊道，每個(gè)廊道都裝有溶解氧指示儀表。在好氧段有送風(fēng)管，送風(fēng)管入口設(shè)有電動(dòng)蝶閥。操作員可根據(jù)各廊道溶解氧指示儀的指示值決定該廊道電動(dòng)蝶閥的開(kāi)啟。

　　5.2 在絕氧段設(shè)水下攪拌器3臺(tái)。水下攪拌器設(shè)定為“自動(dòng)"運(yùn)行狀態(tài)后將連續(xù)運(yùn)行，除非故障或手動(dòng)停機(jī)。motor, maintenance-free use. Solid state switch can protect the short circuit of load, over current of motor, three-phase unbalance and under voltage of power supply. The operation is simple, the status display is intuitionistic, the protection is quick and reliable. 9.3 The use of pneumatic transmitter, the use of digital pressure transformer pressure signal collection, pressure value display intuitive, accurate action value, easy to adjust calibration. 9.4 PLC is easy to operate, and the logic control circuit is realized by software. It can change the control flow according to the operator's requirement at any time to meet the requirement of field operation. 9.5 THE IMPROVEMENT OF ALARM SYSTEM: low-voltage machine monitoring system alarm display clear, operating personnel through the light word display, can directly understａnd the fault point, so as to deal with quickly. Full range of protection. 9.6 improve the Working Environment of PLC control cabinet layout compact, reasonable structure, disk beautiful and generous, running display at a glance, easy to control and operate. 9.7 Remote Monitoring Plc can establish communication with the host computer at any time, and upload the collected switch data and analog data to the remote ALP workstation for remote monitoring. The upper computer can also transmit control instructions to realize the remote control of the low-pressure machine. 10. New System running effect: 10.1 PLC used to eliminate the original control system fault factors, greatly improve the auxiliary equipment of our factory automation control level. Since it was put into operation in June, 1999, there has been no failure record of low-pressure machine control system in operation defect record book. 10.2 many times in time to reflect the mechanical failure of the low-pressure machine, accurate protection of the operation of the main mechanical equipment. 10.3 the control system has achieved inspection-free performance. Since put into operation has never carried on the overhaul maintenance, reduced the overhaul workload greatly, saved the massive overhaul expense. 10.4 the operation mode of the system is completely transplanted to the original system operation mode, and the operator can operate the system directly without training.