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　　工業循環水軋鋼工業中占有非常重要位，其水溫高低直接影響到加熱爐和軋機等設備安全和使用壽命。為及時準確對循環水進行監控，萊鋼軋鋼廠中小型車間水處理采用浙大中控SUPCON JX—300X DCS控制系統。DCS控制系統把計算機、儀表和電控技術融合一起，實現了數據自動采集、處理、工藝畫面顯示、參數超限報警、設備故障報警和報表打印等功能。并此基礎上開發了針對循環水溫溫度閉環控制。
　　2、系統介紹
　　SUPCON JX—300XDCS采用高速工業以太網Scnet作為其過程控制網絡，系統由工程師站、操作站、控制站、過程控制單元等組成，配置靈活。水處理系統規模，水處理SUPCON DCS系統設計了1個控制站，1個操作站設置安全級別可兼做工程師站)，構成兩級結構�？刂普臼乾F場級，直接與現場設備交換數據，完成整個工業過程實時監控功能。操作站(兼工程師站)是監督控制級，即可完成對系統組態、又可實現對現場級檢測、控制、保護功能管理。SUPCON JX—300X DCS系統SCKey組態軟件是一個全面支持該系統各類控制方案組態軟件平臺。 SCKey組態軟件可完成整個系統控制站組態(系統I/O組態、控制方案組態等)、操作站組態(畫面設置、系統流程圖組態、系統報表組態等)。系統構成如圖1所示。
　　3.1 方案設計
　　從生產熱線循環回來工業水流入1#、2#吸水井散熱，并吸水井塔頂1#和2#風機進行降溫，然后1#、2#吸水井底部共用一個出水管為下一個工序供水，水溫要求控制30oC以下。本系統吸水井出水管處安裝Cu50熱電阻對水溫檢測，把溫度信號T1送入DCS處理器，控制規律運算后給出控制信號，控制變頻器來改變電機輸入電壓頻率，來改變電動機轉速，帶動風機降溫，構成一個閉環溫度控制系統。變頻器選用兩臺日本SANKEN(300KW)通用型變頻器，控制原理如圖2所示。
　　循環水吸水井底部熱交換特點，對1#、2#吸水井兩臺風機電機進行主/副控制，主/副電機不同速度曲線驅動風機運轉。1#、2#電機可互為主/副電機選擇，極大方便了操作工操作。
　　3.2 軟件實現
　　為方便操作人員操作，操作站創建循環水溫度監控畫面，可線顯示循環水溫度、變頻器速度反饋、報警等，進行1#、2#風機電機啟�？刂坪椭�/副選擇控制。并切換安全等級線修改主/副電機控制回路中溫度、轉速等控制參數。
　　針對循環水溫度調節存大滯后性特點，對1#、2#風機電機采用分段控制方法，主/副電機控制曲線如圖3所示：當循環水溫度低于20oC時，主/副風機電機變頻器輸出電壓頻率均為20HZ。當循環水溫度變高時，主控制回路中變頻器輸出電壓頻率跟隨增大，當循環水溫度高于24oC時，主電機全工頻運轉。副電機循環水溫度升至23oC時，副控制回路增大副電機輸入電壓頻率，提高風機轉速，當循環水溫度高于28oC時，副電機全工頻運轉，與主電機一起為循環水快速降溫。

Mitel 5422 / 50002825 Dark Grey PKM Interface Module m

XPRESSKIT DBALL DATA ALL INTERFACE /W FIRMWARE MULTI MODULE DEI BYPASS MODULE

Wago 750-466 2-CHANNEL ANALOG INPUT MODULE

SIEMENS DDC Controller 549-210

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Schneider Modicon AS-BMOT-202 Compact Motion Encoder ASBMOT202

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Schneider Modicon AS-J810-000 Gould 584 to 800 I/O Interface Assy Assembly ASJ810000

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MODICON - EATON - IDT - PANELMATE - BOARD P/N 42-13900

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(6 units) THK Linear Guides with two SHS45 HEADS - 9,7,6 AND 5 FEET lengths

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VEE ARC 931-048 USPP 931048

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DVT 630-C3E40 USPP 630C3E40

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Schneider Modicon ADU-212/AS-BADU-212 Univ Analog in Bplane Pwr ADU212 ASBADU212

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Advantech AIMB-742VE Main Board

ALLEN-BRADLEY 1771-OWNA CONTACT OUTPUT MODULE 1771-0WNA

ABB ACS550-U1-023A-4+B055 DRIVE IN A

ACTUS POWER NPSA-20NN-51 NPSA20NN51 Nikki Denso

6ES7431-1KF20-0AB0 Brand , Factory Sealed,

900' 3/0 3/0 1/0 Hollins Aluminum URD Cable Triplex 600 volt USE XLP

SQUARE D ATV-58EU54N4 NSFP ATV58EU54N4

CAMCO 60-500RGDH40-90-90-90-90 USPP 60500RGDH4090909

BANNER ENGINEERING SLSP14900Q88 NSFP SLSP14900Q88

MODICON MMPMF2-400 USPP MMPMF2400

LANDIS & GYR 545-797 NSFP 545797

DATALOGIC MATRIX-2055 NSFP MATRIX2055

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HP/Agilent 54657A MEASUREMENT / STOREGE HP-IB INTERFACE module for 54600 Series

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Omron CJ1W-PA205R

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Schneider Modicon AS-212P-220 NSFP AS212P220

Schneider Modicon AS-J830-001 MODULE INTERFACE 884/800 ASCII

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Schneider Modicon DEP216/AS-BDEP-216

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SIMATIC S7 INPUT MODULE S7300 16DI 48-125VDC EXT 6ES7 321-1CH80-0AA0

Schneider TSX08EAV8A2 Telemecanique NESA PLC NIB

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SIEMENS 505-4816 AC OUTPUT MODULE 5054816

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Delta DeviceNet DN-02 Communication Module

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Advantech AIMB-212

ALLEN-BRADLEY 77131-015-51 Hardware Kit

ABB 3BSE018104R1 AC 800M Processor PM856 K01 XLNT PM856K01

ACCURAY 064892-002 USPP 064892002

A06B-6079-H106 FANUC SERVO AMPLIFIER REMANUFACTURED Refurbished

800A GE Low Voltage Power Circuit Breaker E/O D/O

SIEMENS 6DD1-606-1AA0 USPP 6DD16061AA0

ALLEN BRADLEY SA3100-B020-AA-L6R USPP SA3100B020AAL6R

ALLEN BRADLEY 6181-AAECBCEZZ USPP 6181AAECBCEZZ

KLOCKNER MOELLER DIL10AM/22 NSFP DIL10AM22

GIDDINGS & LEWIS 401-34401-00 USPP 4013440100

YASKAWA ELECTRIC USASEM-35TV12 USPP USASEM35TV12

OMRON NT20M-DT125E NSPP NT20MDT125E

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Siemens Interface Controller Part 6ES5 605-0UB11

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Quantum 8pt Thermoc Input Module model 140 ATI 030 00

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Modicon PC-A984-120

Schneider Modicon High Speed Counter Module AS-BZAE-204 ++

Schneider Modicon AS-BDEP-218 SEALED 16 Pt 115VAC ASBDEP218

Schneider Modicon AS-C916-100 USPP ASC916100

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Schneider Modicon NUL 200/ AS-BNUL-200 ASBNUL200

Schneider Modicon MEMORY CARTRIDGE AS-M780-032

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PROTECH PS-6509 15" TERMINAL MSR POS READY ALDELO

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SIEMENS SINUMERIK 820 T 6FC3261-1AC-Z CONTROL PANEL 5703029301.00 TESTED

SIEMENS MOORE PRODUCTS 15484-11-4 PC BOARD APACS RFB

Allen-Bradley PanelView 900 2711-K9C3 Series C Revision B WARRANTY

54645D 100MHz Mixed Signal Oscilloscope, all Accessories, Calibrated,

ABB Soft Start PTSB 570-600-70 (1SFA894017R7000)

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STRUTHERS DUNN DIRECTOR 4000 76736-32 NSPP 7673632

FANUC A05B-2330-C191 NSPP A05B2330C191

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SIEMENS 6ES5 308-3UA11 6ES5308-3UA11 XLT

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Siemens 6ES5 701-1LA12

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RME HAMMERFALL HDSP 9632 HDSP9632 PCI SOUND CARD

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Wago 750-316 MODBUS FIELDBUS COUPLER

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Modicon AS-T190-401

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Schneider Modicon AS-9385-001

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Schneider Modicon AS-P120-000/ASP120000 Power Supply SEALED

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RELIANCE ELECTRIC 45C-200A USPP 45C200A

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SIEMENS SINUMERIK SYSTEM 3 Screen 6FC388-5MB

Omron PLC Module CJ1W-SCU21-V1 CJ1WSCU21V1 Serial Communications

SIEMENS SIMO DRIVE 1P 6SN1145-1AA0-0BA0

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ZTEC ZT4441 PXI 800Ms/s, 14 bit, 256MS Digital Storage Oscilloscope

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MODICON 557VIC12640 NSFP 557VIC12640

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GENERAL ELECTRIC L90-A00-HCH-F8A-H6C-LXX-N6B-SXX-U6H-W7C NSFP L90A00HCHF8AH6CL

FUJI ELECTRIC 6KF11H044X1A1 USPP 6KF11H044X1A1

SIEMENS 6FX1-113-2AA01 USPP 6FX11132AA01

SEIKO-SEIKI EL6535-10098 USPP EL653510098

YOKOGAWA 371122-B-O/D USPP 371122BOD

Siemens 6ES5 700-2LA11 6ES57002LA11

Siemens Power Supply 6ES5 951-7LD12 V5 NIB OPENED FOR PICTURES

SIEMENS 6ES5-458-7LB11 NSFP 6ES54587LB11

Siemens 6ES5 421-8MA11 USPP 6ES54218MA11

Siemens S5 PLC 6ES5 431-8MA11 Input E-Stand 2

SIEMENS CPU 224 6ES7-214-1BD22-0XB0 6ES72141BD220XB0 Worldwide

Sharp JW-31LM I/O MODULE 32-SLAVE STATIONS 345.6KB 504 POINTS

Square D 8030 RIM-101

Siemens 505-7339 Network Interface Module 5057339

WE SHIP SAME HWIC-1DSU-T1 CISCO Interface Card-

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Siemens TP177A 6AV6 642-0AA11-0AX1 Touch Glass + Film

Schneider Modicon SEALEDAUTOMATION AS-P120-000

Schneider Modicon ASBDEP218 AS-BDEP-218

Schneider Modicon AS-B805-000 ASB805000 Input Module Rev B

Schneider Modicon Memory Module Prom AS-521P-008

Schneider Modicon AS-J892-101 SURPLUS ASJ892101

Schneider Modicon AS-B875-102 HIGH SPEED INPUT MODULE

SchneiderElectricXBTGT4330Panel

SIEMENS 6ES7 331-7PF10-0AB0 SIMATIC S7 THERMO-COUPLE ANALOG INPUT MODULE

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SIEMENS Sinumerik 6FX1820-0AX01 Module E Stand 06

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AllenBradleyPanelView900OperatorInterface2711-T9C1SeriesC

ALLEN BRADLY VersaView 1700M OPERATOR INTERFACE DISPLAY 6186-M17ALTR SER. B

ABB Drive ACS800-02-0170-5+H358+P901 150 HP 3 Phase

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FANUC A06B-6059-H212 USPP A06B6059H212