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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。控制站是現場級，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。

SIEMENS 6SE9-221-5DC40 NSFP 6SE92215DC40

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Hp 584687-001 Bluetooth Module Interface Cable

WELLS FARGO SIEMENS SXR-2L ADDRESSABLE POINT INTERFACE MODULE EXACTPOINT SM APT

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Siemens LOGO! DM8 230R 6ED1 055-1FB00-0BA1 Module

Omron c200h-cn221

Schneider Modicon AS-HDTA-200 Primary Subrack 5 Slots

Schneider Modicon 984 series AS-B809-016 Free Ship

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Schneider Modicon MODICON/ AS-P120-000/042 403 424/7657 POWER SUPPLY NIB

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Schneider Modicon TSX COMPACT DISCRETE INPUT MODULE DEP-220 / AS-BDEP-220

TELEMECANIQUE XBTGT2120 Touchscreen Glass

Schneider TELEMECANIQUE TWIDO TWDLMDA40DTK

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SIEMENS Sinumerik 6FX1120-3BB01 PC Board

Ethernet Communication Module USB SPI ENC28J60 Remote

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Allen-Bradley AB 1746-OG16 /C 1746OG16 TTL Output Module NIB

ABB 086363-002 PC BOARD 086363002

AC TECHNOLOGY M34400B NSFP M34400B

A06B-6058-H025 Drive Fanuc

8 Stec LF-310A-EVD Liquid Mass Flow Controller TEB 0.5g/min

SECO SV3440-01000 USPP SV344001000

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ALLEN BRADLEY 2727-T7P30D1F NSFP 2727T7P30D1F

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GENERAL ELECTRIC DS215SLCCG2AZZ01B USPP DS215SLCCG2AZZ0B

YAMATAKE 82114927-001 USPP 82114927001

MARPOSS 7534250000 USPP 7534250000

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SIEMENS S5 6ES5 312-5CA12 IM312 including cable

Siemens CPU Module 6ES5 944-7UB21 7300

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RELEASE SuperMicro X9DRD-IF Motherboard FULL MFR

Texas Instruments 5TI-1031-1

Telemecanique LA1 LC580BD Interface Module

TSXSCY21601 Modicon Premium 485 MP TSX-SCY-216-01

Siemens DCS Module 6DS1701-8AB IN Box, seal opened,

Modicon MM-PM15-401

Schneider Modicon REMOTE I/O PROCESSOR S908 RIO INTERFACE MODULE AS-J890-101

Schneider Modicon ASBADU204 Compact Analog Input AS-BADU-204

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Schneider Modicon AS-BZAE-204

Schneider Modicon AS-P120-000 P120 Compact 115/230V AC Power Supply WARRANTY

Schneider Modicon High Speed Counter AS-B883-001

Schneider Telemecanique Overload Relay LRD16KN

SCHNEIDER AUTOMATION MODICON TSX 140DA154000 INPUT MODULE

PWR-950-AC 950W AC P/S FOR CISCO 7600 AND CAT 6500

SIEMENS 6ES5451-4UA12 OUTPUT MODULE 32POINT .5AMP 24VDC IN A BOX

SIEMENS 6DD1640-0AC012 mo. warrantyFree UK/EU ShippingPrice Inc UK VAT

LS INDUSTRIAL G7L-CUEB RS-232C COMMUNICATION MODULE

SIEMENS Simodrive 6SN1123-1AB00-0HA1

SIEMENS Sinumerik 840C/840CE P/Supp 6FC5114-0AA01-1AA0

SIEMENS /MOORE 15994-21-4 PC BOARD MODULE XLNT

Allen-Bradley SLC 500 Cat. 1746-OA16 Output Module Series D

ALLEN BRADLEY RIGHT HAND DOOR HARDWARE KIT 1494V-L3

ABB SACE E2B/E-1600 OUT OF

A06B-0148-B088#0075 FANUC SERVO MOTORS REMANUFACTURED

6x500m/spool Fujikura Panda Type Polarization Maintaining Fiber 1300nm

ORMEC GN3-J594001 USPP GN3J594001

ALLEN BRADLEY 1771-DMC4 NSPP 1771DMC4

ALLEN BRADLEY 1336S-B007-AX-EN-GM1-L4 USPP 1336SB007AXENGM1

GENERAL ELECTRIC DS200IMCPG1CCB USPP DS200IMCPG1CCB

TB WOODS WFC4020-0CHT USPP WFC40200CHT

SQUARE D ATV-58HD23M2XZU USPP ATV58HD23M2XZU

CONVERGENT ENERGY 054620701 USPP 054620701

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Siemens 6ES5-242-1AA32Counter Module S5-135/55 IP242A

SIEMENS 6ES5-752-0AA12/6ES5752-0AA12 INTERFACE SUBMODULE NIB

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RSP720-3C-10GE Cisco Route Switch Processor 720 with 10 Gigabit EN uplinks Rout

Telemecanique TSX SUP 702

SIEMENS Simatic 6ES5441-4UA11 Comm. Interface Module

Wago 750-493 3-phase power measurement module 1 A

SIEMENS 6SE9522-4DG40

Modicon AS-P464-002

Schneider Modicon Electric Modbus Plus Terminator Connector Kit AS-MBKT-185

Schneider Modicon ASB371001 BCD Register Input Module AS-B371-001

Schneider Modicon AS-B875-001 8 Channel Analog Input

Schneider Modicon AS-B827-032 24VDC Input Module

Schneider Modicon Gould 484 Programmable Controller AS-C484-266

Schneider Modicon AS-J878-000/ASJ878000 Modem NICE

Schneider Automation TSXDSY16T2 Output Module 16 Point TSX-DSY-16T2 -

SIEMENS 505-6108B ANALOG INPUT MODULE 5056108B

Reliance Shark 45C965 Triac Output Module 45C-965

Siemens 9.5" LCD Monitor 6FM2805-4AR03_6FM28054AR03_6FM28O5-4ARO3_6FM28O54ARO3

SIEMENS Sinumerik Module Modul DMP #6FC5111-0CA03-0AA2

Prosoft MVI56-GSC Communications Module 1

SIEMENS Module 6SN1123-1AA00-0AA2 (6SN11231AA000AA2)NIB

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SIEMENS 6FC3984-1FB Tape Reader - Used

ALLENBRADLEY2706-NC12DATALINERPROGRAMMINGCABLE

Allen Bradley Terminal Board 9101-1780 Amphenol /Sealed

ABB IRB6600 ROBOT IRB 6600

ZEBRA 090-401-00203-09 USPP 0904010020309

(RR11-1) 1 NIB WESTINGHOUSE A202K3CAZ 100A 600VAC CONTACTOR RR11-1

MITSUBISHI FR-A240-E-37K-TF USPP FRA240E37KTF

ALLEN BRADLEY 1336T-MCB-SP51B NSPP 1336TMCBSP51B

GENERAL ELECTRIC 44B377098-G01 NSPP 44B377098G01

FISHER ROSEMOUNT 3051-CG4A02A1AH2M5 USPP 3051CG4A02A1AH21

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REXROTH 0-608-820-092 NSPP 0608820092

TEXAS INSTRUMENTS PLC 555-1102 USPP 5551102

Siemens 6ES5 521-8MA21 CP521 SI COMMUNICATION MODULE RE

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SIEMENS 6ES5-451-7LA11 OUTPUT MODULE 6ES54517LA11

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Siemens S5 Digital Output / 6ES5 441-8MA11

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Siemens 6ES5 441-4UA11 6ES54414UA11

Square D 8030 CRM-601

Schneider Electric TSXFPCG010 Interface Module FIP/PCMCIA

WMD PDO PHASE DISPLACEMENT OSCILLATOR MODULAR EURORACK MODULE

SIEMENS 6ES7621-6BD02-0AE3 SIMATIC C7-621 ASI ping Worldwide

SIEMENS Touch Glass + Protective film TP177A 6AV6642-0AA11-0AX1

Seco SE2302

Schneider Modicon ASH827103 PERFECT 800 Series Rack AS-H827-103

Schneider Modicon AS-B571-001 NSFP ASB571001

Schneider Modicon CNC Memory Board AS-506P-F12

Schneider Modicon AS-H810-208 USPP ASH810208

Schneider Modicon AS-B840-108 Reed Relay Output

MODICON 5-1/2" PANELMATE PLUS INTERFACE MM-PMC1-100

Siemens 8 Point Input Module Model:505-7028 NIB

Schneider Modicon Premium TSXDEY16A4 TSX DEY 16A4 120VAC Input NIB

Siemens MODULE 8 PT IN 24VDC 5PIN EM141 6ES7-141BF30-0X

SIEMENS Sinumerik 6FX1112-0AA01 E Stand D & 01

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SIEMENS 6SN1123-1AA00-0DA2 ( 6SN11231AA000DA2 ) NIB

SIEMENS 6SN1123-1AB00-0HA1 6SN1 123-1AB00-0HA1 SIMODRIVE 611 Power Module 8A

SIEMENS 6FC5210-0DF05-0AA0 SINUMERIK PCU 50 6FC52100DF050AA0 NIB

AllenBradleyVersaView6176M-15PN/B6176M15PN

ALLEN-BRADLEY 1201-DMA HMI DOOR MOUNT BEZEL

ABB CIRCUIT BOARD DSQC 302

ADEPT TECH 30340-40000 USPP 3034040000

(4) Samsomatic Switches PWA 27-1039 _ PWA271039 _ 143PC03D

INDRAMAT MAC071C-0-JS-4-C/095-A-0/W1520LV USPP MAC071C0JS4C095A

TOPEX 2200-HYC USPP 2200HYC

FANUC A06B-0651-B211 USPP A06B0651B211

DANAHER MOTION MX2000-1C NSFP MX20001C

RELIANCE ELECTRIC 30V4151 USPP 30V4151

MOTOROLA MVME2700-761-I/O USPP MVME2700761IO

LENZE EVS9323-ET NSFP EVS9323ET

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Siemens Digital Output Module S5 6ES5 441-8MA11

Siemens 6SE7 090-0XX84-6FF5 Worldwide

SIEMENS TP37 6AV3637-1PL00-0AX0 Touchscreen Glass

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Mercedes C230/C240/C300 Satellite Radio Universal Media Interface Module OEM

XEON 6.4GT/s Turbo8000GB HDD 24GB TRUE 3CH DDR3 RAM

SIEMENS 6ES7 314-1AF11-0AB0 6ES73141AF110AB0 in Sealed, Old Box

Siemens PG 702 6ES7 702-0AA00-0YA0 6ES7702-0AA00-0YA0

Reliance 0-51879-5

Schneider Modicon AS-B132-000 PLC

Schneider Modicon AS-B109-000 NSFP ASB109000

Schneider Modicon AS-P500-610 USPP ASP500610

Schneider Modicon AS-B804-116 IN A BOX

Schneider Modicon AS-B260 analog output

Modicon Panelmate Plus MM-PM15-403

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Siemens Simatic Analog Output Module 6ES5 470-7LB11

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SIEMENS Sinumerik Simodrive Sirotec cable lead 6FX2002-3AC02-1AB0

SIEMENS OFFER & WIN 6SN1123-1AA00-0DA0 Simodrive LT-Modul INT.80A

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SIEMENS CNC I/O Board Module 6FC3984-3RA ___ 6FC 3984

Adlink CPCI-R6780

ALLEN-BRADLEY 1791-0B16 SER.B QUANTITY I/O BLOCK 24V DC 16 POINT OUTPUT MODULE

ABB ACH550-VDR-022A-6 AC VARIABLE SPEED DRIVE 20HP/600V E-BYPASS MOTOR STARTER

ACTION INSTRUMENTS AIOI8100 USPP AIOI8100

6ES7315-6FF01-0AB0 6ES7315-6FF04-0AB0 Brand , Factory Sealed,

8bit Microcontroller Family 1K/64 OTP/ROM 87C750 - 2PCS

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BLAW KNOX 133618 FNFP 133618

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MODICON AS-P453-621 NSFP ASP453621

ITE SIEMENS ND63T900 NSFP ND63T900

COMPUMOTOR DR-1015B-115 USPP DR1015B115

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Siemens 6ES5-456-7LB11 NSFP 6ES54567LB11

SIEMENS 6ES5 760-0AA11 6ES57600AA11

SIEMENS S5 6ES5 464-8ME11 Analog Input

Siemens S56ES5925-3SA11 CPU925 Module

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Siemens Simatic CPU 224 6ES7214-1AD22-0XB0

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Hp A7231-04018 Hp 9000 Ps Interface Cable Module Assy. A7231-04018 Hp9000 Server

WS-X6148-GE-TX Cisco Classic Interface Module Expansion module 48 ports

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Siemens LOGO! PLC 12/24RCo 6ED1052-2MD00-0BA5

Omron C200H-NC112

Schneider Modicon AS-E381-902 ASE381902 Executive Cartridge

Schneider Modicon Program Pack AS-P371-002 Module asp371002

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Schneider Modicon 140-EIA-921-00 AS-I Master 1 CH 140EIA92100

Schneider Modicon AS-P930-000 MODULE 6 MON WARR OBSOLETE

Schneider Modicon TSX COMPACT TRUE LOW DISCRETE OUTPUT MODULE DAP 217/AS-BDAP-217

SMC Decentralized Serial Interface Wiring EEX500-IB1-E2 Input Module EX500

Schneider Telemecanique XBTFC064510 XBTFCO64510

SIEMENS TI 505-3532 DC OUTPUT MODULE