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　　工业循环水轧钢工业中占有非常重要位，其水温高低直接影响到加热炉和轧机等设备安全和使用寿命。为及时准确对循环水进行监控，莱钢轧钢厂中小型车间水处理采用浙大中控SUPCON JX—300X DCS控制系统。DCS控制系统把计算机、仪表和电控技术融合一起，实现了数据自动采集、处理、工艺画面显示、参数超限报警、设备故障报警和报表打印等功能。并此基础上开发了针对循环水温温度闭环控制。
　　2、系统介绍
　　SUPCON JX—300XDCS采用高速工业以太网Scnet作为其过程控制网络，系统由工程师站、操作站、控制站、过程控制单元等组成，配置灵活。水处理系统规模，水处理SUPCON DCS系统设计了1个控制站，1个操作站设置安全级别可兼做工程师站)，构成两级结构。控制站是现场级，直接与现场设备交换数据，完成整个工业过程实时监控功能。操作站(兼工程师站)是监督控制级，即可完成对系统组态、又可实现对现场级检测、控制、保护功能管理。SUPCON JX—300X DCS系统SCKey组态软件是一个全面支持该系统各类控制方案组态软件平台。 SCKey组态软件可完成整个系统控制站组态(系统I/O组态、控制方案组态等)、操作站组态(画面设置、系统流程图组态、系统报表组态等)。系统构成如图1所示。
　　3.1 方案设计
　　从生产热线循环回来工业水流入1#、2#吸水井散热，并吸水井塔顶1#和2#风机进行降温，然后1#、2#吸水井底部共用一个出水管为下一个工序供水，水温要求控制30oC以下。本系统吸水井出水管处安装Cu50热电阻对水温检测，把温度信号T1送入DCS处理器，控制规律运算后给出控制信号，控制变频器来改变电机输入电压频率，来改变电动机转速，带动风机降温，构成一个闭环温度控制系统。变频器选用两台日本SANKEN(300KW)通用型变频器，控制原理如图2所示。
　　循环水吸水井底部热交换特点，对1#、2#吸水井两台风机电机进行主/副控制，主/副电机不同速度曲线驱动风机运转。1#、2#电机可互为主/副电机选择，极大方便了操作工操作。
　　3.2 软件实现
　　为方便操作人员操作，操作站创建循环水温度监控画面，可线显示循环水温度、变频器速度反馈、报警等，进行1#、2#风机电机启停控制和主/副选择控制。并切换安全等级线修改主/副电机控制回路中温度、转速等控制参数。
　　针对循环水温度调节存大滞后性特点，对1#、2#风机电机采用分段控制方法，主/副电机控制曲线如图3所示：当循环水温度低于20oC时，主/副风机电机变频器输出电压频率均为20HZ。当循环水温度变高时，主控制回路中变频器输出电压频率跟随增大，当循环水温度高于24oC时，主电机全工频运转。副电机循环水温度升至23oC时，副控制回路增大副电机输入电压频率，提高风机转速，当循环水温度高于28oC时，副电机全工频运转，与主电机一起为循环水快速降温。

ALLEN BRADLEY 1336VT-B020-EAP-L1 USPP 1336VTB020EAPL1

BARBER COLMAN 80EA-10001-002-0-00 USPP 80EA10001002000

KEYENCE CORP WD310 NSFP WD310

SIEMENS 6ES7-643-6CA01-3JX0 USPP 6ES76436CA013JX0

SSD DRIVES 547-2400-9-8-1-010-1010-1-00 USPP 5472400981010102

YASKAWA ELECTRIC R84H-M USPP R84HM

Siemens 6ES5-243-1AA11/6ES5243-1AA11 ANALOG INPUT XLNT

Siemens 6ES5-900-7AC21 USPP 6ES59007AC21

SIEMENS 6ES5-380-7AA12/6ES5380-7AA12 TIMER MODULE XLNT

Siemens 6ES5 430-7LA12 DIGITAL INPUT MODULE GOOD TAKEOU

Siemens S5 6ES5 305-7LB11

Siemens 6SE7038-6GL84-1BG2 6SE7 038-6GL84-1BG2 6SE70386GL841BG2 NIB

Siemens 6ES7 334-0KE00-0AB0 -- 6ES73340KE000AB0

Siemens MSP10G

Mitsubishi AJ71PT32-S3 Melsec Interface Module Master

WS-X6704-10GE Cisco 6500 10 Gigabit EN Interface Module 4 ports

Siemens 6ES7 350-2AH00-0AE0 6ES73502AH000AE0 FM350-2

Siemens PLC S7-200 PC/PPI PCPPI - USB + OI Version

Reliance 0-56303

Schneider Modicon 4 NICE INPUT MODULES MODEL AS-B828-016.

Schneider Modicon AS-B237-000 USPP ASB237000

Schneider Modicon AS-P930-001 NSFP ASP930001

Schneider Modicon AS-B824-016 800 OUTPUT MODULE I/O 24VDC TRU HI OUT 16PT

Schneider Modicon AS-B551-001 115VAC INPUT NIB

MODICON OUTPUT MODULE AS-B802-008 115VAC 8 POINT

Siemens Simatic 6ES5420-4UA12 6ES54204UA12 Input Module

Siemens 6ES7 131-1BL01-0XB0 -FS- 6ES71311BL010XB0

SIEMENS SIMATIC TI305-01T OUTPUT MODULE RELAY "NIB"

SIEMENS 6DD1681-0AE2 SIMADYN I/O MODULE

SIEMENS SINUMERIK 6FX1410-0CX83 6FX 14100CX83 6FX14100CX83 NIB

SIEMENS 6SN1-111-0AA01-1AA0 NSPP 6SN11110AA011AA0

SIEMENS Simodrive 6RB2000-0NF01 Control Board.

SIEMENS 802S 6FC5 500-0AA00-1AA0 Membrane Keypad

Advantech Axiomtek FSC-1621VD Main Board

Allen-Bradley 1771-OVN 10-30 VDC Output Module

ABB ACS550-U1-125A-4 AC INVERTER DRIVE 100HP 75KW 3PH 48..63HZ 380...480VAC

ACUITY IMAGING AR4000 NSPP AR4000

6ES7455-1VS00-0AE0 Brand , Factory Sealed,

900 HP 460 Reduced Voltage Electric Motor Starter WEG SSW061100T2257ESH2Z

SQUARE D KIP36250 NSFP KIP36250

COGNEX 800-5838-4 NSPP 80058384

BASLER ELECTRIC BE1-87T-E1E-A1L-NON2F USPP BE187TE1EA1LNON2

MODICON PC-E984-285 USPP PCE984285

LENZE EVS9326-ES USPP EVS9326ES

DOVER FLEXO 1201-00-010-1 USPP 1201000101

Siemens 6ES5 102-8MA02 6ES51028MA02

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SIEMENS 6ES5 951-7LB14 6ES59517LB14

SIEMENS S5 6ES5-318-8MB12 ET200U

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SIEMENS SINUMERIK 6FC5203-0AF00-0AA0 Membrane Keypad

Siemens 6ES5308-3UC11

HWIC-2T Cisco High-Speed WAN Interface Card expansion module " SEALED"

XPRESSKIT NEXGEN DATABUS ALL COMBO VEHICLE DOOR LOCK OVERRIDE INTERFACE MODULE

SIEMENS 6ES5-430-4UA11 6ES54304UA11

Siemens MP270 6AV6 542-0AC15-2AX0 Membrane Keypad

Omron CVM1-BC053

Schneider Modicon AS-BDAP-212 8x24 VDC Discrete Combi DAP-212

Schneider Modicon AS-4863-025 USPP AS4863025

Schneider Modicon AS-J890-001 REMOTE I/O INTERFACE SINGLE CHANEL

Schneider Modicon AS-516P-002 Processor Board Rev C20 (AIND/UEX)

Schneider Modicon DTA201/AS-HDTA-201

Schneider Modicon -AS-5284-001

Silent Knight SD500-AIM Addressable Input Module

Schneider TSXMFP032P Mem Card

Siemens SITOP30 POWER SUPPLY 30AMP 480V 6EP1437-1SL01

Siemens 505-4616 Output Module 16 Point 5054616

SIEMENS SINUMERIK 810 6FX1128-1BA00 WITH MODULES TESTED WARRANTY

CSM Serial Communications Module PN 469880-01

SIEMENS Simodrive C98043-A1204-L26 Control Board

SIEMENS SIMODRIVE 6SN1145-1AA01-0AA2SINUMETIK 840D NCU-BOX 6FC52476FC5356 B3

Advantech Axiom Axiomtek IPC-586VDHGX Card FS

Allen-Bradley 6185-DACABBZ Series A Touchscreen A4

ABB 3E034013 DRIVE 3E 034013

ACCURAY 069829-002 USPP 069829002

A06B-6088-H230#H500#EM FANUC SERVO AMPLIFIER REMANUFACTURED

801FSC148 ALLEN BRADLEY 801 FSC148

SIEMENS 6ES5-188-3UA12 NSPP 6ES51883UA12

ANN ARBOR INX5486S-M NSFP INX5486SM

ALLEN BRADLEY 6181-GLFDBCZZZ USPP 6181GLFDBCZZZ

KOLLMORGEN IND M205-C21-259 NSFP M205C21259

GORING KERR DSP2 USPP DSP2

ZEBRA Z220-451-00054 USPP Z22045100054

PACIFIC SCIENTIFIC S33NLYY-LNF-NS-01 USPP S33NLYYLNFNS01

Siemens 6ES5-330-7AB11 NSFP 6ES53307AB11

SIEMENS 6ES5 440-8MA11 DIGITAL OUTPUT MODULE IN BOX

SIEMENS S5 6ES54648MF11 6ES5 464-8MF11 NIOB

Siemens INTERFACE MODULE PROFIBUS ET200U 6ES5-3188MB12

Siemens 6ES7 223-1PL00-0XA0 6ES7223-1PL00-0XA0 in Box Seal Opened

SIEMENS OP7 6AV3 607-1JC20-0AX0

QLogic SANbox 9200 Switch 9000 SB9200-32B 31277-12

GM 19202820 Personal Device Interface Module PDIM USB MP3 iPod 10-2012

Tii Telephone Network Interface Module 3711H 71 1I01

Siemens 3RK1301-1BB00-0AA2 DS1-X 3RK1 301-1BB00-0AA2

Siemens ET200S 6ES7 135-4GB01-0AB0 6ES7135-4GB01-0AB0

Modicon PC-E984-485

Schneider Modicon GOULD C921 COMMUNICATION PROCESSOR AS-C921-101

Schneider Modicon AS-BMOT-202 Compact Motion Encoder ASBMOT202

Schneider Modicon AS-C924-000 USPP ASC924000

Schneider Modicon AS-P120-000 IN BAG ASP120000

Schneider Modicon AS-B814-108 ASB814108 Relay Output

Schneider Modicon Memory Module NIB Part AS-385-904

Schneider Telemecanique XBTFC064510 XBTFCO64510

SCHNEIDER ELECTRIC TXBTF044510E TXB TF044510E

PROSOFT MVI46-MCM MVI46MCM

SIEMENS 6ES5 458-7LB11 OUTPUT 250VAC MODULE IN BOX

SIEMENS 6DD2920-0AR1 NSPP 6DD29200AR1

HONEYWELL W940 W940B W/ MODULES A2 14502501-002 & AUDIO COMMUNICATION AUDMB16D

SIEMENS SIMODRIVE 6SN1145-1BA01-0BA1SINUMETIK 840D NCU-BOX 6FC52476FC5357#2ZF

SIEMENS SINUMERIK 810D/840DPCU20 6FC5210-0DF00-1AA1

SIEMENS MOORE APACS39SAMCAN SAM STANDARD ANALOG MODULE 16133-71 TESTED 25154

Allen-Bradley PanelView 600 2711-B6C10

550 HP 460 Reduced Voltage Electric Motor Starter WEG SSW060670T2257ESZ

ABB Teach Pendant

A06B-0153-B077#0076 FANUC SERVO MOTORS REMANUFACTURED

71100C HP/Agilent 2.9 GHz Spectrum Analyzer

RELIANCE ELECTRIC 1398-DDM-150 NSFP 1398DDM150

ALLEN BRADLEY 1785-L40C USPP 1785L40C

ALLEN BRADLEY 1394-AM75 NSFP 1394AM75

GENERAL ELECTRIC DS3800NPSE1C1C USPP DS3800NPSE1C1C

TOSHIBA VT130G3U4220 USPP VT130G3U4220

SYMAX 8020-SMM-720 USPP 8020SMM720

FANUC NE-1505-470-300 USPP NE1505470300

Siemens 6ES5-095-8MC01 USPP 6ES50958MC01

SIEMENS 6ES5 315-8MA11 6ES53158MA11

SIEMENS 6ES5928-3UB12 6ES5 928-3UB12S5-135U CPU928B Processor READ

Siemens 6ES5 710-8MA21 USPP 6ES57108MA21

SIEMENS 6ED1052-1CC00-0BA4 6ED10521CC000BA4 ping

Siemens LOGO! 6ED1052-1CC01-0BA6 NIB + LOGO USB Cable

Rigol Function/Arbitrary Waveform Generators DG3121A

Telemecanique XUD-H003537

Smc EX230-SDN1 Pack of 6 SMC EX230SDN1 DeviceNet Interface Module

w/ 1 year

Siemens BSM75GB120DN1 IGBT Module

Modicon AS-T584-001

Schneider Modicon Automation AS-B805-016 16 PLC Module

Schneider Modicon AEG/GOULD// AS-B564-000 OUTPUT MODULE 24-48VAC XLNT

Schneider Modicon AS-B884-002 I ASB884002 I $3375.00 I

Schneider Modicon AS-B232

Schneider Modicon P230 PROGRAMMER AS-P230-080

Schneider Modicon AS-P451-622 REMOTE I/O PROCESSOR MODEL P451 200 SERIES

Schneider Automation 140 DAO 842 10 140DAO84210 Output Module

Siemens 16 Pt Analog Input Module 505-2555

Reliance Electric 0-57416-K Remote I/O Comm Mod Missing Mounting Clip

Siemens 6ES7272-0AA30-0YA1 6ES7 272-0AA30-0YA1 TD 200 2-Line Text Display

SIEMENS SINUMERIK800SW6 NSFP SINUMERIK800SW6

OMRON COMMUNICATION MODULE UNIT I/O- DRT1-COM

SIEMENS SIMODRIVE (POWER SUPPLY) 6SN1145-1AA01-0AA1

SIEMENS SINUMERIK PROGRAM PANEL 6FC 5203 5210 5253

SIEMENS NetApp X279A-R5 300GB 15K.6 FC Hard Disk Drive 108-00156-B2 ST3300656FC

AllenBradley1771-OFE2/BPLC-5AnalogOutputModuleAB3

Allen Bradley SLC500 Output Module

ABB part kit for Advac vacuum circuit breaker cell switchgear trip unit 5 15 kV

Zwick Tensile Tester 20848

, factory sealed SIEMENS 6FX1120-5BA01

MODICON AM-S980-130 USPP AMS980130

ALLEN BRADLEY 1394C-SJT05-L USPP 1394CSJT05L

GENERAL ELECTRIC THPC-3630BG3T USPP THPC3630BG3T

GE FANUC 44A392661-G01 USPP 44A392661G01

SIEMENS 6SC9111-2AC25 USPP 6SC91112AC25

SICK OPTIC ELECTRONIC IVC-2DM1111 USPP IVC2DM1111

Siemens 6ES5 701-3LA13 6ES57013LA13

Siemens S5 6ES5 247-4UA31 6ES52474UA31 NIOB

SIEMENS 6ES5-464-8ME11 ANALOG INPUT MODULE 6ES54648ME11

Siemens 6ES5 421-8MA12/6ES5421-8MA12 INTERFACE MODULE XLNT

Siemens S5 Power Supply 6ES5951-7LB21 E Stand 03

Siemens CPU313C 6ES7-313-5BE00-0AB0

SFP-GE-T 1000BASE-T SFP MODULE FOR CISCO NEBS 3 ESD

Square D 8030 ROM-221

SIEMENS 6ES5 314-3UR11 INTERFACE MODULE

WE SHIP SAME Cisco WS-C4948-E CATALYST 4948 48-PORT 1YR

Siemens 6GK5 788-1ST00-2AA6 6GK57881ST002AA6 Ethernet

SIEMENS TP177A TP177B Protective Film

Schneider Modicon Input Module AS-BDEO-216/DEO

Schneider Modicon AS-BDEP-215 INPUT MODULE 16 POINT 5V TTL ASBDEP215

Schneider Modicon AS-B805-016 NSFP ASB805016

Schneider Modicon Modem Assy Model AS-J378-000

Schneider Modicon AS-M8A-002 RECONDITIONED

Schneider Modicon AS-B885-002 ASB885002 Basic Module

Schneider/Telemecanique XBTGT1100 Magelis Advanced Panel FREE SHIP GUARANTEED

SIEMENS 6ES7 326-1BK01-0AB0 SIMATIC S7 INPUT MODULE

SATT CONTROL 492620802 USPP 492620802

Siemens HMI 6AV6 641-0AA11-0AX0 NIB 6AV66410AA110AX0

SIEMENS SINUMERIK 802D KEY BOARD 6FC5603-0AC13-1AA0

Siemens 6ES5524-3UA13 Communication Module SIMATIC with Warranty 6ES5373-1AA41

SIEMENS 6SN1145-1AA00-0AA0 NSFP 6SN11451AA000AA0

SIEMENS 6SN1118-0AA11-0AA1 6SN1 118-0AA11-0AA1 SIMODRIVE 611-A Control Unit

SIEMENS 6FC5152-2AX01-1AA01 USPP 6FC51522AX011AA0

AllenBradleyPanelview2711-T6C20L1/B2711T6C20L1

Allen Bradley1746-0V16 Series C Output Module / SLC 500

ABB Drive w/ Bypass ACH401603032, 460V AC 56 A 3 Phase 60 HZ 40 HP

Adept X-Y Slide Robot Module with Controller and Pendant

(8098) Tech-Motive Servo Amplifier Model 513A P/N: 49-4100-02C5 (8098)

INDRAMAT TDM1.4-100-300-W1 USPP TDM14100300W1

WESTINGHOUSE PC-700A-10-103003 USPP PC700A10103003

FANUC A06B-6076-H001 USPP A06B6076H001

ELECTROMOTIVE 2054-FVG+ USPP 2054FVG

RELIANCE ELECTRIC 805401-1S USPP 8054011S

OMRON C200H-FZ001 NSFP C200HFZ001

OMRON C500-SNT31-V4 USPP C500SNT31V4

Siemens 6ES5 441-4UA12 6ES54414UA12

Siemens 6ES5-921-1BA11 USPP 6ES59211BA11

SIEMENS 6ES5-400-7AA12 USPP 6ES54007AA12

Siemens 6ES5 440-8MA11 -- 6ES54408MA11

Siemens S5 6ES5 385-8MB11 6ES53858MB11

Siemens 6SE7090-0XX84-0AB0 Masterdrives CUVC in Box

Siemens 6ES7 332-5HB01-0AB0 -FS- 6ES73325HB010AB0

Siemens U-55T

MODICON AS-J830-001 MODULE INTERFACE 884/800 ASCII

WS-X4648-RJ45V-E Cisco Catalyst 4500E Series Line Card Switch 48 ports

Siemens 6ES7 414-2XK05-0AB0 6ES74142XK050AB0 NIB

Siemens RLU222 Controller

Reliance 0-57404-2F

Schneider Modicon Maria as Jeanne lying back in bathtub Last Tango in Paris 24X30 Poster

Schneider Modicon AS-B248-501 NSFP ASB248501

Schneider Modicon AS-P933-001 ASP933001 Fast Shipping

Schneider Modicon AS-B832-016 -DI-

Schneider Modicon AS-B802

MODICON MM-PMC2-300 OPERATOR INTERFACE PANEL

Siemens Simatic 505-4232 110 VAC Input Module

SIEMENS 6ES5-308-3UA12 NSFP 6ES53083UA12

Siemens S5 6ES5458-4UA12 Digital Output Module NIB Free Shipping