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集散控制系統(tǒng)(Distributed Control System-DCS)集計算機技術、控制技術、通信技術、CRT技術于一體,廣泛應用于生產(chǎn)過程控制系統(tǒng)。隨著計算機和網(wǎng)絡技術的飛速發(fā)展,產(chǎn)生了一種新型的控制系統(tǒng)———現(xiàn)場總線控制系統(tǒng)(Fieldbus Control System-FCS)。但國內(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應用廣泛、技術成熟,在現(xiàn)有的技術條件和市場條件下,F(xiàn)CS還不能完全取代DCS,而且目前現(xiàn)場總線設備和系統(tǒng)還十分昂貴。因此,除了新建企業(yè)外,國內(nèi)企業(yè)在較長時間不可能全面采用現(xiàn)場總線技術,而必須走逐步發(fā)展、過渡的道路。 我們在上海石化股份公司環(huán)保部水質(zhì)凈化廠監(jiān)控系統(tǒng)的改造項目中,對3個生產(chǎn)單元已有的DCS和PLC進行改造,增加通信功能,實現(xiàn)總調(diào)度室對各生產(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個生產(chǎn)單元。另外,在廠部設有總調(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各個生產(chǎn)單元進行監(jiān)控。為了適應生產(chǎn)需要,提高生產(chǎn)效率,改善操作條件,加強監(jiān)控手段,確保各生產(chǎn)裝置的正常運行,急需對各生產(chǎn)單元和總調(diào)度室進行技術和設備的更新改造,從而能在總調(diào)度室對各裝置進行監(jiān)視管理,及時了解各裝置的運行情況,達到指揮及時和調(diào)度準確的目的。 2.1 現(xiàn)場監(jiān)控系統(tǒng)的改造 現(xiàn)場監(jiān)控系統(tǒng)的改造要充分利用原有儀表和設備,主要考慮可靠性和實時性。首先對自控程度較高的3個單元進行改造(系統(tǒng)結(jié)構(gòu)見圖2—1): 四期污水處理生產(chǎn)單元控制設備配置了兩套ALLEN-BRADELY公司PLC設備。25塊開關量輸入信號卡,可采集384點信號;7塊開關量輸出信號卡,可輸出112點信號;3塊模擬量輸入信號卡,可采集24點信號。兩套AB—PLC通過DH+(數(shù)據(jù)高速通道)實現(xiàn)數(shù)據(jù)共享。在原有的現(xiàn)場控制計算機上分別增加以太網(wǎng)卡,通過以太網(wǎng)將實時數(shù)據(jù)送到總調(diào)度室處理。 輸出192點信號;1塊模擬量輸入信號卡,可采集8點信號。系統(tǒng)運行采用遙控開關操作與全模擬流程盤顯示。在原有的Siemens S5-115UPLC上增加RS-232通訊模塊(CP524)和1臺現(xiàn)場操作站,用點對點方法連接,使PLC的數(shù)據(jù)通過現(xiàn)場操作站送到以太網(wǎng)上,與總調(diào)度室監(jiān)控計算機通信。但RS-232傳輸速率只有9600bps,操作站僅對現(xiàn)場起到監(jiān)視作用。Siemens 3VL9300-3MN00
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2627 VAT GATE VALVE GLIDE 200MM, 89094-R1 87327-R1
17264 EPPENDORF SINGLE CHANNEL PIPETTE, ADJUSTABLE 20-200 UL EP 3123000055
10213 APPLIED MATERIALS KIT,ON-BOARD CHAMBER INTEGRATION 0240-70691
8040 BANNER FIBER OPTIC CABLE IT23S
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7691 HORIBA-STEC INJECTION VALVE P/N:0190-04690 IV-2410AV-02H-180S
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13295 TEKTRONIX PCB, DRAM/PROCESSOR BOARD 671-2771-00
15931 LAM RESEARCH RF CABLE, 6.4M 834-036619-021
16118 APPLIED MATERIALS BASE, HEATER, GIGA-FILL SACVD 0021-36008
16972 APPLIED MATERIALS WELDMENT VLV MANF 4 STATION 0010-47446
15188 APPLIED MATERIALS MTR ENCODER ASSY ROBOT EXTENSION 0090-02953
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4127 APPLIED MATERIALS ASSEMBLY MINI LP-3 MAGNET , 0021-04527 0010-01198
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2604 DAIHEN CPI CONTROLLER PN:3D80-001919-11 MDM-01A
10637 APPLIED MATERIALS ACTUATOR, LIFT ASSY 0190-25812
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21754 SUPERIOR ELE SLO-SYN STEPPING MTR W/ BALL SCREW M061-LF-517
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14396 APPLIED MATERIALS ADAPTER, WIDE BODY INDEXER CMF CENTURA 0040-87410
15080 APPLIED MATERIALS HARNESS ASSY,DTLR DOP/S INTERLOCK 0140-35916
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14827 APPLIED MATERIALS RING, TEFLON, BLOCKER, GIGA-FILL SACVD 0021-38799
14821 APPLIED MATERIALS CLAMP ATM INNER RACE XP ROBOT 0040-83305
14620 APPLIED MATERIALS TOOL,DDF3 I-CLP, 0040-77405
19931 RKI INSTRUMENTS PCB ASSY, MDK311V-0 RKP-90107
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4785 BIMBA CYLINDER F0-041.5-3
1527 GEMS SENSORS FLOW SWITCH 20VA 120/240VAC FS-150
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12177 DESOUTTER TORQUE SPINDLE/CONTROLLER, P/N: 6151654230 EME35-10J
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15890 APPLIED MATERIALS ISOLATOR, DC BIAS 0020-20114
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322-0103// AMAT APPLIED 0090-70003
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注:聯(lián)系我時,請說是在“傲立機床網(wǎng)”上看到的,謝謝!