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集散控制系統(tǒng)(Distributed Control System-DCS)集計算機(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)過程控制系統(tǒng)。隨著計算機(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(yīng)用廣泛、技術(shù)成熟,在現(xiàn)有的技術(shù)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(shè)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(shù),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(jìn)行改造,增加通信功能,實(shí)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(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各個生產(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)度室對各裝置進(jìn)行監(jiān)視管理,及時了解各裝置的運(yùn)行情況,達(dá)到指揮及時和調(diào)度準(zhǔn)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(shè)備,主要考慮可靠性和實(shí)時性。首先對自控程度較高的3個單元進(jìn)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(shè)備配置了兩套ALLEN-BRADELY公司PLC設(shè)備。25塊開關(guān)量輸入信號卡,可采集384點(diǎn)信號;7塊開關(guān)量輸出信號卡,可輸出112點(diǎn)信號;3塊模擬量輸入信號卡,可采集24點(diǎn)信號。兩套AB—PLC通過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)場控制計算機(jī)上分別增加以太網(wǎng)卡,通過以太網(wǎng)將實(shí)時數(shù)據(jù)送到總調(diào)度室處理。??輸出192點(diǎn)信號;1塊模擬量輸入信號卡,可采集8點(diǎn)信號。系統(tǒng)運(yùn)行采用遙控開關(guān)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(diǎn)對點(diǎn)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(jī)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
GIDDINGS & LEWIS M.1016.9333R0Giddings & Lewis Exec Cntl 486 W/2MEG 573-19515-20
Giddings & Lewis - P/N: 502-04077-00R1 - PIC900
GIDDINGS & LEWIS 502-03814-60R1, 572-03814-60
GIDDINGS & LEWIS 502-03840-44R0
GIDDINGS & LEWIS 502-03552-02R3
GIDDINGS & LEWIS 501-04707-00
GIDDINGS & LEWIS 502-03055-00
Giddings & Lewis pic900 502-03814-60R1
Giddings & Lewis M.1017.3888 M10173888 503-26683-01
GIDDINGS & LEWIS 501-04707-00
M.1016.9510-R15
Giddings & Lewis 502-02474-00
Giddings & Lewis 502-03280-00
Giddings & Lewis pic900 502-03814-60r1
GIDDINGS & LEWIS 503-26683-01 M10173888R4
Giddings & Lewis M.1301.9806
Giddings & Lewis M.1302.7479
Giddings & Lewis M.1017.3888 M10173888 503-26683-01
GIDDINGS & LEWIS 502-03055-00
GIDDINGS & LEWIS 502-03722-02R1
Giddings & Lewis M.1017.3095 503-25908-01
Giddings & Lewis MMC 4-AXIS
REFURBISHED GIDDINGS & LEWIS 502-03061-02
Giddings & Lewis Executive Control Board 503-26116-20
Giddings & Lewis Executive Control Board 501-04708-00
GIDDINGS & LEWIS 502-03055-00
GIDDINGS & LEWIS 502-04073-20R3
Riparato GIDDINGS & LEWIS 502-03055-00
GIDDINGS & LEWIS 502-04011-10R3
GIDDINGS & LEWIS 502-03063-01
Giddings & Lewis M.1017.3888 M10173888 503-26683-01
GIDDINGS & LEWIS 502-02208-00
Giddings & Lewis 502-02917-02
Giddings & Lewis 503-15613-00
GIDDINGS & LEWIS 502-02165-00
Giddings & Lewis 502-02778-50
Giddings & Lewis 502-03055-00
GIDDINGS & LEWIS 502-02098-00
Giddings & Lewis M.1017.2284 M10172284 503-19184-02
GIDDINGS & LEWIS M.1017.3436
Giddings & Lewis 502-03638-51,502-03638-51R3
GIDDINGS & LEWIS 502-03840-44R0
GIDDINGS & LEWIS 502-03814-40R1
GIDDINGS & LEWIS 503-26405-80
Giddings & Lewis 572-03431-10
GIDDINGS & LEWIS 502-03876-02R3
GIDDINGS & LEWIS 502-03846-20
Giddings & Lewis PiC900 502-03638-11R4
Giddings & Lewis 503-14035-00
Giddings & Lewis 502-03362-00
GIDDINGS & LEWIS 502-02833-20
GIDDINGS & LEWIS 502-03846-22
Giddings & Lewis 502-03638-51, 502-03638-51R3
Giddings & Lewis 502-03676-23R0
Giddings & Lewis M-1017-3098
GIDDINGS & LEWIS 502-03518-22
Giddings & Lewis PIC900 502-03814-40R1
Giddings & Lewis 502-03814-60R1,572-03814-60
Gidding & Lewis 503-19030-00
Giddings & Lewis PIC900 Turbo CPU Module 502-03814-60R1
GIDDINGS & LEWIS 502-03876-02R3
Giddings & Lewis 502-03814-60R1, 572-03814-60
GIDDINGS &LEWIS NSM2304,401-30235-01
Giddings & Lewis 501-04707-00
GIDDINGS & LEWIS 502-03518-02
GIDDINGS & LEWIS 401-56452-00
GIDDINGS & LEWIS 502-03055-00
Giddings & Lewis 503-26406-00
GIDDINGS & LEWIS PiC900 502-03732-02
GIDDINGS & LEWIS 501-02981-00
Giddings & Lewis DSM015 Centurion Servo Drive 401-56452-00
Giddings & Lewis 501-04316-00
GIDDINGS & LEWIS 502-03814-60R1, 572-03814-60
Giddings & Lewis M10173888 503-26683-01
Giddings & Lewis M.1016.9291 502-03810-03
Giddings & Lewis M.1016.8892 502-03518-03
Giddings & Lewis Dual Servo SBX 502-03423-01
Giddings & Lewis A/D Convertor 501-04308-00/ 502-03422-00
Giddings & Lewis M.1016.9544 502-04050-00
GIDDINGS & LEWIS 502-03055-00
Giddings & Lewis M.1016.8929 502-03548-00
Giddings & Lewis M.1017.3888 M10173888 503-26683-01
Giddings & Lewis M.1016.9010 502-03605-00
Giddings & Lewis 1016.9329 502-03839-04
Giddings & Lewis M.1017.3774 M10173774 503-26606-41
Giddings & Lewis M.1302.7479
Giddings & lewis pic900 502-03814-60r1
Giddings & Lewis Kollmorgen Mmc 4-AXIS
Giddings & Lewis 502-03638-51,502-03638-51R3
Giddings & Lewis 502-03638-51, 502-03638-51R3
Giddings & Lewis Kollmorgen MMC 4-AXIS
Giddings & Lewis, 572-02722-50
GIDDINGS & LEWIS 501-02982-00
USED GIDDINGS & LEWIS 502-03063-01
GIDDINGS & LEWIS 502-02098-00
GIDDINGS & LEWIS 502-03362-00
GIDDINGS & LEWIS 501-02981-00
GIDDINGS LEWIS PLC MODULE PIC900 502-03549-00R3
GIDDINGS & LEWIS 502-02208-00
Giddings & Lewis 502-03642-03
GIDDINGS & LEWIS : 502-03843-00 R0
GIDDINGS & LEWIS PiC900 M.1016.9243 RO, 502-03732-03
GIDDINGS & LEWIS 502-03842-02 R3
Giddings & Lewis M.1017.3095 503-25908-01
giddings & lewis 5020281408
Giddings & Lewis 810-21721-00
Giddings & Lewis 503-18010-01
GIDDINGS & LEWIS 502-02165-00
Giddings and Lewis 502-03518-00R4
Giddings & Lewis 502-03782-02R1
Giddings & Lewis M.1017.2284 M10172284 503-19184-02
Giddings & Lewis 502-02734-50
GIDDINGS & LEWIS 502-03548-00R2
GIDDINGS & LEWIS : 502-03843-00
GIDDINGS & LEWIS 502-03677-02R1
GIDDINGS & LEWIS 502-03518-22R2, 502-03518-22
giddings & lewis 501-04026-00
giddings & lewis 5020281408
GIDDINGS & LEWIS PIC900 M.1016.9070 R1 502 03640 02
GIDDINGS&LEWIS 501-04561-00/502-03567-00
Giddings and Lewis PiC900 Module 502-03840-04R0
Giddings & Lewis : 502-03963-00
Giddings & Lewis : 071752 - 53947
GIDDINGS & LEWIS : 502-03551-02
Giddings & Lewis 502-03642-02
Giddings & Lewis : 501-03332-00/502-02869-20
Giddings & Lewis 502-03657-03R2
GIDDINGS & LEWIS PiC900 502-03732-02R1
Giddings & Lewis 502-03552-22R1
GIDDINGS & LEWIS 502-03443-00
GIDDINGS&LEWIS 871-20662-02
Giddings & Lewis - Model: 572-03839-04R0 - PIC90
GIDDINGS LEWIS 1-2100302
Giddings and Lewis 502-03605-00R3
Giddings & Lewis 502-03817-00R1
Giddings & Lewis : 502-03638-10
Giddings & Lewis 502-02778-50
GIDDINGS & LEWIS 502-02907-20
Giddings and Lewis PiC900 5 Slot Rack 503-19184-02R3
GIDDINGS & LEWIS 502-02869-20
GIDDINGS & LEWIS 502-03842-00 R0
Giddings and Lewis 502-03842-02R3
FREESHIPSAMED FIVE 502-04077-00R1
Giddings and Lewis 502-04104-00r3
GIDDINGS & LEWIS 1-2100302 4004
Giddings & Lewis 502-03840-03R2
Giddings and Lewis 502-02825-00
Giddings & Lewis 502-03410-01 502-02947-01
Giddings and Lewis 502-02769-00 5010310301
GIDDINGS & LEWIS 502-03677-22R3
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