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集散控制系統(tǒng)(Distributed Control System-DCS)集計(jì)算機(jī)技術(shù)、控制技術(shù)、通信技術(shù)、CRT技術(shù)于一體,廣泛應(yīng)用于生產(chǎn)過(guò)程控制系統(tǒng)。隨著計(jì)算機(jī)和網(wǎng)絡(luò)技術(shù)的飛速發(fā)展,產(chǎn)生了一種新型的控制系統(tǒng)———現(xiàn)場(chǎng)總線控制系統(tǒng)(Fieldbus Control System-FCS)。但國(guó)內(nèi)生產(chǎn)企業(yè)的情況是:大多數(shù)企業(yè)還處于模擬儀表和人工控制的階段,采用DCS控制系統(tǒng)的企業(yè)仍是少數(shù)。由于DCS應(yīng)用廣泛、技術(shù)成熟,在現(xiàn)有的技術(shù)條件和市場(chǎng)條件下,F(xiàn)CS還不能完全取代DCS,而且目前現(xiàn)場(chǎng)總線設(shè)備和系統(tǒng)還十分昂貴。因此,除了新建企業(yè)外,國(guó)內(nèi)企業(yè)在較長(zhǎng)時(shí)間不可能全面采用現(xiàn)場(chǎng)總線技術(shù),而必須走逐步發(fā)展、過(guò)渡的道路。 ??我們?cè)谏虾J煞莨经h(huán)保部水質(zhì)凈化廠監(jiān)控系統(tǒng)的改造項(xiàng)目中,對(duì)3個(gè)生產(chǎn)單元已有的DCS和PLC進(jìn)行改造,增加通信功能,實(shí)現(xiàn)總調(diào)度室對(duì)各生產(chǎn)裝置的集中監(jiān)控。 2?系統(tǒng)改造方案?? 根據(jù)水質(zhì)凈化廠各生產(chǎn)單元的功能和建設(shè)階段,分為廠外調(diào)節(jié)池、污水一段、氧化溝、四期污水處理、污泥脫水、污泥干化6個(gè)生產(chǎn)單元。另外,在廠部設(shè)有總調(diào)度室,但是總調(diào)度室的監(jiān)控水平較為落后,改造之前基本上不能對(duì)各個(gè)生產(chǎn)單元進(jìn)行監(jiān)控。為了適應(yīng)生產(chǎn)需要,提高生產(chǎn)效率,改善操作條件,加強(qiáng)監(jiān)控手段,確保各生產(chǎn)裝置的正常運(yùn)行,急需對(duì)各生產(chǎn)單元和總調(diào)度室進(jìn)行技術(shù)和設(shè)備的更新改造,從而能在總調(diào)度室對(duì)各裝置進(jìn)行監(jiān)視管理,及時(shí)了解各裝置的運(yùn)行情況,達(dá)到指揮及時(shí)和調(diào)度準(zhǔn)確的目的。 2.1?現(xiàn)場(chǎng)監(jiān)控系統(tǒng)的改造 ??現(xiàn)場(chǎng)監(jiān)控系統(tǒng)的改造要充分利用原有儀表和設(shè)備,主要考慮可靠性和實(shí)時(shí)性。首先對(duì)自控程度較高的3個(gè)單元進(jìn)行改造(系統(tǒng)結(jié)構(gòu)見(jiàn)圖2—1): ??四期污水處理生產(chǎn)單元控制設(shè)備配置了兩套ALLEN-BRADELY公司PLC設(shè)備。25塊開(kāi)關(guān)量輸入信號(hào)卡,可采集384點(diǎn)信號(hào);7塊開(kāi)關(guān)量輸出信號(hào)卡,可輸出112點(diǎn)信號(hào);3塊模擬量輸入信號(hào)卡,可采集24點(diǎn)信號(hào)。兩套AB—PLC通過(guò)DH+(數(shù)據(jù)高速通道)實(shí)現(xiàn)數(shù)據(jù)共享。在原有的現(xiàn)場(chǎng)控制計(jì)算機(jī)上分別增加以太網(wǎng)卡,通過(guò)以太網(wǎng)將實(shí)時(shí)數(shù)據(jù)送到總調(diào)度室處理。??輸出192點(diǎn)信號(hào);1塊模擬量輸入信號(hào)卡,可采集8點(diǎn)信號(hào)。系統(tǒng)運(yùn)行采用遙控開(kāi)關(guān)操作與全模擬流程盤(pán)顯示。在原有的Siemens S5-115UPLC上增加RS-232通訊模塊(CP524)和1臺(tái)現(xiàn)場(chǎng)操作站,用點(diǎn)對(duì)點(diǎn)方法連接,使PLC的數(shù)據(jù)通過(guò)現(xiàn)場(chǎng)操作站送到以太網(wǎng)上,與總調(diào)度室監(jiān)控計(jì)算機(jī)通信。但RS-232傳輸速率只有9600bps,操作站僅對(duì)現(xiàn)場(chǎng)起到監(jiān)視作用。 1746-BAS /C Allen bradley
18029 APPLIED MATERIALS MTR BRK ENCODER ASSY 29POS 0090-75011
3923 BANNER TWO-HAND CONTROL DEVICE 18-24VDC 4.5VA ATDR6
1804 UNICORN REGULATED DC POWER SUPPLY 30V 20A UP-3020
4853 SANYO DENKI STEP-SYN STEPPING MOTOR 0.75A 0.45°/STEP 103-7555-7043
9611 HP PCB AGILENT PIN BOARD (A-3821) E3120-66561
4022 LAM RESEARCH ESC POWER SUPPLY CONTROL BOX 853-250758-001-1-221
3453 THOMAS PRODUCTS MODEL 1800 FLOW SWITCH, FLOW RATE 0.5 GPM 42549
12053 WITTENSTEIN ROBOTIC SERVO MTR,6200RPM,320V MMSI 070G-060E-320C-1FNO-T2701
22064 KOLLMORGEN POWERMAX II BIPOLAR SERIES 1.8° STEP M21NRXB-LSN-NS-04
12157 FESTO VACUUM GENERATOR, P/N: 162530 VADMI-140-P
21772 BERGER LAHR STEPPER MOTOR B511138
3736 PI DIGITAL PIEZO CONTROLLER E710K038X E-710K038
2318 KEYENCE DIGITAL OPTICAL FIBER AMPLIFIER, EX-500 SERIES EX-502
21108 LAM RESEARCH CABLE ASSY, 1.4M 853-234816-600
20756 THERMO PCB, DISPLAY BOARD SP/HP CIC0000550
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21086 APPLIED MATERIALS CABLE ASSY, 15CM 0150-27602
20793 AT&S PCB ASSY, MVL/A 27967G
20747 ISUZU SEISAKUSHO PCB ASSY MDL60-01-1
21294 APPLIED MATERIALS WOODHEAD CONNECTIVITY DEVICENET DNTA14114A1
21692 FAULHABER MOTOREN MOTOR 22B 21:1 2233V024S
1231 VERIFLO PRESSURE REGULATOR 43800806 SQ6050W2PFSMM
3694 DIGITAL DYNAMICS SIOC POWER SUPPLY 27-053660-00
21715 SCHNEIDER ELECTRIC BERGER LAHR STEPPING MOTOR RDM37/6 G A1
18029 APPLIED MATERIALS MTR BRK ENCODER ASSY 29POS 0090-75011
3923 BANNER TWO-HAND CONTROL DEVICE 18-24VDC 4.5VA ATDR6
11893 ALLEN BRADLEY GUARDMASTER SAFETY RELAY, P/N: 440R-N23132 MSR127TP
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4126 SAMSUNG COLOUR DIGITAL CAMERA, 230VAC, 50HZ, 4.5W SDC-4304PF
1544 ENDO COMPACT LIGHTWEIGHT TOOL BALANCER, 9601 EK-0
5949 OEM SWAPPER 0053800-000
7188 APPLIED MATERIALS WAFER LIFT 5000 CVD W/O 0100-09086 0010-09341
11944 TOKYO ELECTRON PCB, OPE-PANE SW BOARD 881-621010-1
12048 FESTO SHOCK ABSORBER, P/N: 548074 DYSW-10-17-Y1F
10368 APPLIED MATERIALS KIT, COMMON CENTURA PER CHMBR OTB CTN 0240-13112
1334 NIKON STAGE REMOTE CONTROLLER ISS200
14062 ASML PCB, MODULE CARD SVG 4022.471.7370
9613 MKS ANGLE VACUUM VALVE, MANUAL OPERATED CV25-K2K2-MKVV
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17656 ADVANTEST PCB ASSY BGG-012785
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注:聯(lián)系我時(shí),請(qǐng)說(shuō)是在“傲立機(jī)床網(wǎng)”上看到的,謝謝!