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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
10440 EUTECH INSTRUMENTS PH/MV/CONDUCTIVITY/C/F METER PC 2700
20605 NOVELLUS PCB MOD CONT DC/VC CONVERTER 27-053425-00 03-053424-00
21338 LAM RESEARCH FAN MOUNTING BRACKET 714-087266-001
10076 NOVELLUS CABLE ASSEMBLY, 102347 0912 03-409637-00
12239 VERIFLO UHP DIAPHRAGM VALVE HIGH FLOW MANF, P/N: 45300401 955Y3NC/NCFSFFFB
3537 ALLEN-BRADLEY DC OUTPUT MODULE 10-60 VDC 1771-OBD C 1771-0BDC
13235 RECIF PCB, PCB0371B STDBH0371A
13445 LAM RESEARCH DISK CALIBRATION 8" 715-042856-004
14108 APPLIED MATERIALS ASSY THERMAL ELEC DRIVER 0090-09061
14218 EBARA TECHNOLOGI MOUNT BRACKET C-3106-231-0001
4583 APPLIED MATERIALS CABLE ASSY, EMO REMOTES, 0150-15262
14335 APPLIED MATERIALS OUTER SHIELD,TXZ 200MM 0021-03980
14858 APPLIED MATERIALS BLOCK ROTATION LOCK INDEXER 0020-36378
15329 LAM RESEARCH PCB, AUTOETCH 490 LRC 2896A
15338 LAM RESEARCH BELL JAR INSULATOR CAP 716-021720-001
15308 APPLIED MATERIALS LIFT PIN CONDUCTIVE, LONG 0020-32164
15348 APPLIED MATERIALS ROTATION LOCK, MANUAL INDEXER 0020-40923
15350 APPLIED MATERIALS SUPPORT ACTUATOR SHUTTER LINKAGE 0020-24781
15484 APPLIED MATERIALS CENTURA SCREEN BAFFLE ASSY CORROSION 0010-76932
7611 ESCAP DC SERVO MOTOR NFOA01A40520
15884 APPLIED MATERIALS SHAFT WING, FROG LEG 0020-20399
15894 APPLIED MATERIALS HOLDOWN RING,VIEWPORT 0030-70084
16714 APPLIED MATERIALS HARNESS ASSY, TC INTERFACE 0150-20197
16144 APPLIED MATERIALS COVER, TC AMP,DXZ 0021-09948
16145 APPLIED MATERIALS HOUSING MAGNETICALLY COUPLED ROTATION 0020-36031
16157 APPLIED MATERIALS ALIGNMENT TOOL FROG LEG ROBOT 0040-20095
16695 APPLIED MATERIALS HARNESS ASSY, TURBO INTERCONNECT, SEIKO- 0140-04033
16187 LAM RESEARCH BELLOWS, INNER GATE 839-012255-001
16721 APPLIED MATERIALS HARNESS ASSY, VME-EP, HD 0140-09506
907 APPLIED MATERIALS WELDMENT, PROCESS GAS, SIDE, DPS 0050-31429
2492 APPLIED MATERIALS SHIELD 8" PCII @C & D 0020-26588
17758 NOVELLUS CABLE ASSY, 6.5M 03-279891-00
17516 SPECTRA-PHYSICS PCB, ARM BREAK RELEASE LZT-9019
17933 PALL FILTER ASSY, GASKET SEAL GLFF4581VMM4
7661 APPLIED MATERIALS VLV CHECK RETURN ADAPTER HE 3870-03651
13249 APPLIED MATERIALS INSULATORS, LAMP CAVITY, RIGHT 0200-20162
13234 RECIF PCB, PCB0372B STDBH0372A
14136 CONDOR DC POWER SUPPLY, PCB 02-91113-0001
14295 APPLIED MATERIALS SCG100 GAUGE, 10 TORR 0190-48920
14860 APPLIED MATERIALS BRACKET, HINGE, UPPER SHROUD 0020-35789
15084 APPLIED MATERIALS CATHODE POSI DECODER 0010-00151 0100-00041
15085 APPLIED MATERIALS CABLE ASSY,INTERLOCK JUMPER 0150-35796
15349 APPLIED MATERIALS STOP ACTUATOR SHUTTER LINKAGE 0020-24782
15357 APPLIED MATERIALS SPACER LOWER GUARD BTM SHIELD 0020-02922
15513 LAM RESEARCH PLATE,LOWER BAFFLE,6" 715-028627-002
2466 PROLOG PCB, UNIVERSAL I/O CARD PWB 110494-001
55 PL PCB ASSY Z80 PROCESSOR, 108810 108811
16036 APPLIED MATERIALS FLANGE ELBOW WELDMENT, BARATRON 0050-35182
15905 VAT KIT BELLOWS FEEDTHROUGH, 790-088439-002 431380
16700 APPLIED MATERIALS PRESS. TRANS. HRN 11-13 0140-10034
16134 APPLIED CERAMICS BUFF WINDOW,QTZ 91-01920A
15736 LAM RESEARCH PCB ASSY DC CONTROLLER 810-800086-007
2508 HIRATA PCB, RELAY PROCESSOR BOARD HPC-784A
16662 APPLIED MATERIALS PCB ASSY, LOAD LOCK BEEPER 0100-35279
16947 APPLIED MATERIALS HINGE FOR ORIENTER 5200, 5500 0040-02644
17098 THERMO SCIENTIFIC SMALL TUBE PLASTIC TIP DISPENSING CASSETTE 24073290
17759 NOVELLUS CABLE ASSY, 6M 03-279882-00
18235 APPLIED MATERIALS BOX, TC COVER 0020-04608
18320 APPLIED MATERIALS BELLOWS FINGER LIFT, ALUMINUM PRODUCER 0040-49386
18254 APPLIED MATERIALS PCB ASSY, 0110-00072 0100-00072
18431 OBJET GEOMETRIES PCB, HEAD DRIVER, PCB-00001 BRD-00023
17759 NOVELLUS CABLE ASSY, 6M 03-279882-00
18235 APPLIED MATERIALS BOX, TC COVER 0020-04608
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!