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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。

Schneider Modicon AS-BDAP-217 OUTPUT GUARANTEED ASBDAP217

Schneider Modicon AS-B825-016

Modicon PanelMate Plus 92-01125-01 Interface No Monitor

Schneider TELEMECANIQUE XBT-GT-2110 XBTGT2110 with cable

Telemecanique ATV38HU41N4 2.2KW Inverter w/ Op Panel

Reliance Electric Remote I/O Interface 45C37B

SIEMENS 7Pu4020-0AN20 USPP 7PU40200AN20

SIEMENS Sinumerik NCU 6FC5357-0BA33-0AE0

Prosoft MVI56-BAS MVI56BAS Communications Module

SIEMENS Module 6SN1123-1AA00-0BA2 (6SN11231AA000BA2)NIB

SIEMENS SIMODRIVE 6SN1145-1BA01-0DA1SINUMETIK 840D NCU 6FC52476SN11236FC5357

SIEMENS 6FC3984-1FB Tape Reader - Used

ALLENBRADLEY2706-NC12DATALINERPROGRAMMINGCABLE

Allen Bradley Terminal Board 9101-1780 Amphenol /Sealed

ABB ISOMAX 2 POLE 250 AMP MOLDED CASE CIRCUIT BREAKER S4H250BW-2

ZEBRA 110XIIII NSFP 110XIIII

(S2-2) 1 GARDNER 201EAP2006 ASM-CONTROL S2-2

MITSUBISHI FR-A540-55K-NA-1 USPP FRA54055KNA1

ALLEN BRADLEY 1336VT-B030-EOR-L3-S1 USPP 1336VTB030EORL3S

GENERAL ELECTRIC 531X210DMCAMM1 USPP 531X210DMCAMM1

FISHER ROSEMOUNT 480-15-60 USPP 4801560

SIEMENS 6ES5-922-3UA11 NSFP 6ES59223UA11

REXROTH 0608841030 NSPP 0608841030

TEXAS INSTRUMENTS PLC PM550-C-112 USPP PM550C112

Siemens 6ES5 523-3UA11 6ES55233UA11

Siemens 6ES5-984-2UA11 USPP 6ES59842UA11

SIEMENS 6ES5-451-7LA11/6ES5451-7LA11 OUTPUT MODULES5 NNB

Siemens 6ES5 318-8MB11 6ES5 318-8MB11S5 IM 318-B Interface Module

Siemens S5 Digital Output 6ES5 451-7LA12 E Stand 02

Siemens C98043-A7009-L1

Siemens 6ES5 430-7LA12 -FS- 6ES54307LA12

Square D 8030 DIM-101

Schneider Interface Module 140 ESI 062 10 ASCII 3572

WITH 3 YEARS HP ON-SITE . Win7.WEBCAM.DVDRW

SIEMENS 6ES7702-0AA01-0YA0 6ES7 702-0AA01-0YA0

SIEMENS touch panel 6AV3 627-1QL01-0AX0 TP27-10

Shawmut A4BY 1000

Schneider Modicon ASH819209 PERFECT 800 Series Rack AS-H819-209

Schneider Modicon AS-B572-010 OUTPUT MODULE 0-10V ANALOG

Schneider Modicon Controller AS-B805-016

Schneider Modicon AS-H819-100 7-Slot PLC Module Rack Chassis 984

Schneider Modicon AS-B840-180 SELECTABLE N.O./N.C. REED RELAY OUTPUT MODULE

MODICON 24VDC OUTPUT MODULE B232 501

Siemens 6SE7 331-7KF02-0AB0 Input module

Schneider Modicon 171CCC98030 Ethernet CPU I/O Base ENET Switch Circuit Breaker

Siemens MODULE 200 X 8POINT 24VDC 5PIN 6ES7-141-1BF10

SIEMENS SINUMERIK 6FX1118-1AA02 GOOD TAKEOUT

Siemens Simatic S7 6GK7 343-1EX11-0XE0 CP 343-1 Ethernet Communication Module

SIEMENS 6SN1123-1AA00-0HA0 /6SN11231AA000HA0 LT-MOD NIB

SIEMENS 6SN1123-1AB00-0CA2 6SN1 123-1AB00-0CA2 SIMODRIVE 611 Power Module

SIEMENS 6FC5-210-0DA20-2AA1 USPP 6FC52100DA202AA1

AllenBradleyVersaView1000PPanelViewTouchScreen

ALLEN-BRADLEY 1201-DMA HMI DOOR MOUNT BEZEL

ABB Circuit Breaker 300 Amp Sace S5N Shunt & Auxiliary 240/480/600 volt

ADEPT TECH 30846-00020 NSPP 3084600020

(4357) Allen Bradley Contact Kit 40783-802-01 Contactor (4357)

INDRAMAT MAC090C-2-KD-4-C/110-A-I4/DI-520 NSFP MAC090C2KD4C110A

TOSHIBA VFP1-4550UP-B1 USPP VFP14550UPB1

FANUC A06B-6035-H422 USPP A06B6035H422

DANFOSS 175H4423 USPP 175H4423

RELIANCE ELECTRIC 3RA2003 NSFP 3RA2003

MTS SYSTEMS CO MPA-35-460-167 USPP MPA35460167

MACTRON INC MGA-3A USPP MGA3A

Siemens 6ES5 377-0AA41 -FS- 6ES53770AA41

Siemens 6ES5-701-3LA12 USPP 6ES57013LA12

SIEMENS 6ES5-375-8LC21 USPP 6ES53758LC21

Siemens 6ES5 377-0AA32 -- 6ES53770AA32

Siemens I/O Module 6ES5 482-8MA13 working

SIEMENS 6SE7 222-1HF00-0XA0 6SE7222-1HF00-0XA0 FreeShip

Siemens TP7 6AV3 607-1NH00-0AX0 Touch Panel in Box

Siemens 6SA 8110-0AC00

MERCURY MR-52 DUAL READER INTERFACE MODULE

XEON 6.4GT/s Turbo6000GB HDD 24GB TRUE 3CH DDR3 RAM

Siemens 6ES7 314-1AG13-0AB0 6ES7314-1AG13-0AB0 in Box

Siemens PLC 6ES5-421-8MA11 6ES54218MA11 6ES5421-8MA11

Reliance 0-51893-2

Schneider Modicon AS-984A-816 PLC

Schneider Modicon AS-B224-001 NSFP ASB224001

Schneider Modicon AS-P530-0MA POWER SUPPLY REPAIRED

Schneider Modicon AS-B804-116 Output Module 115VAC

Schneider Modicon AS-B266

Modicon PanelMate Plus MM-PM10300C 92-01685-00 ! WOW !

Siemens Simatic PLC Digital Input Module S7-321

Siemens 6ES7 322-1FH00-0AA0 -FS- 6ES73221FH000AA0

Siemens Simatic 8 Moble Operator Interface Panel 277 HMI w/ Stop Boxed A

SIEMENS 6DD1611-0AD0 MEMORY MODULE /BOX

SIEMENS SINUMERIK SIROTEC MODULE 6FX1190-1AA00

SIEMENS OFFER & WIN SIMODRIVE 6SN1123-1AA00-0HA0 with 6SN1118-0AD11-0AA0

SIEMENS Simodrive 6SN 11451BA01-0DA0 _ 6SN11451BA010DA0

SIEMENS Circuit Board 6FC9310-1MD01 _ 6FC93101MD01

ADLink NuDAQ ACL-6128A Isolated Analog Output Card NIB

ALLEN-BRADLEY 1791-0A32 Block I/O 120V AC 32 Point Module 32 Output

ABB ACS 600 AC AUTOMATION INC MULTIDRIVE 250HP

Active EMC broadband antenna 30MHz to 1GHz BicoLOG 30100 X, , biconical

6ES7316-1AG00-0AB0 6ES7316-2AG10-0AB0 Brand , Factory Sealed,

8M; 720 20 8M 20 PD; HAWK - 7208M20

SIEMENS A1-116250-505 USPP A1116250505

BOSCH 0-608-830-109 USPP 0608830109

BAILEY CONTROLS DSQC-266G USPP DSQC266G

MODICON AS-P453-622 USPP ASP453622

JOHNSON CONTROLS DVN-3000-NET-ES USPP DVN3000NETES

CONSOLIDATED BEARING 54317U NSPP 54317U

Siemens 6ES5 095-8MA02 6ES50958MA02

Siemens 6ES5-457-7LA11 USPP 6ES54577LA11

SIEMENS 6ES5 760-1AA11 6ES57601AA11

SIEMENS S5 6ES5 465-4UA12 Module 6ES5-465-4UA12

Siemens S56ES5927-3SA12 CPU927 Module

Siemens 6ES7222-1HF00-0XA0 6ES7 222-1HF00-0XA0 FreeShip

Siemens Simatic Mobile Panel 6AV6545-4BB16-0CX0 6AV6 545-4BB16-0CX0

Siemens 6AV3520-1EL00

HP AGILENT 35651C INTERFACE/SIGNAL PROCESSOR MODULE

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

Siemens 6ES5 521-8MA21 6ES5521-8MA21

Siemens LOGO! PLC to PC USB Port Cable FreeShip

Omron C200H-OC222

Schneider Modicon AS-C916-100 PLC

Schneider Modicon AM-S985-022 AS-S985-C22 REV A1 PC BOARD

Schneider Modicon AS-J470-000 USPP ASJ470000

Schneider Modicon 24 VDC INPUT AS-B827-032

Schneider Modicon AS-P930-100

Schneider Modicon TSX-SUP-A05 PLC AS-I Power Supply TSXSUPA05

SMC Controller Input Output Module CEU2P

Schneider TELEMECANIQUE XBT-GT-2110 XBTGT2110

Siemens TI 500-5016 Analog Output Module

Siemens 6AV3 525-1EA01-0AX0 6AV35251EA010AX0 Panel

SIEMENS Sinumerik 6FX1130-6BA00 I/O Interface .

ECDL Syllabus 5.0 Module 7b Communication Using Outlook 2010 Paperback

SIEMENS SIMODRIVE LT-MODUL INT. 160A 6SN1123-1AA00-0EA0

SIEMENS SIMODRIVE 6SN1145-1BA01-0BA1SINUMETIK 840D NCU-BOX 6FC52476FC53572ZF

Adlink cPCI-R3700A REV.B1

ALLEN-BRADLEY 800MB-CPB16RAS PUSH BUTTON

ABB 1600A BREAKER SACE EMAX E2N 16 DCHGADGGHX IN CRATE

ACCU SORT 16043 USPP 16043

A06B-6064-H308#H550 FANUC DRIVES REMANUFACTURED

800' Davidson 3/0 3/0 3/0 3/0 Quadruplex Aluminum URD Direct Burial 600 volt

SIEMENS 3RW2240-0CB15 USPP 3RW22400CB15

ALLEN BRADLEY 8520-3S10A-BAT-EX4-S-1-2-3-4-5-7 USPP 85203S10ABATEX4S

ALLEN BRADLEY 5370-CVIM USPP 5370CVIM

JAGUAR VXSM220-1 USPP VXSM2201

GENERAL ELECTRIC DS3800NFCD1Q1H USPP DS3800NFCD1Q1H

YASKAWA ELECTRIC CACR-SR10SZ1SSY86 USPP CACRSR10SZ1SSY86

MITSUBISHI HCSFS1524BK NSFP HCSFS1524BK

Siemens 6ES5-308-3UC21 NSPP 6ES53083UC21

SIEMENS 6ES5 430-7LA12 DIGITAL INPUT

SIEMENS S5 6ES5 453-7LA11 Digital Output Module

Siemens Digital Output Module 6ES5 454-7LA11 6ES54547LA11

Siemens 6ES7 221-1BH22-0XA0 6ES72211BH220XA0 FreeShip

SIEMENS OP270-6 6AV6542-0CA10-0AX0 Membrane Keypad

Redback CM-M-512MB Connection Manager BAC8GMBEAA

Texas Instruments 5TI5-5020

TERAWAVE 10096-01 M2-0-ALL/2C/10/ATM/ED INTERFACE MODULE FREE SHIP

TSXCUSBMBP Modicon Premium Modbus Plus Converter TSX-CUS-BMBP

Siemens EM 222 6ES7 222-1BF20-0XA0 EM222 PLC

Modicon MMS22351C1A

Schneider Modicon AS-P120-000 Power Supply Module - 1 YEAR RETURN POLICY

Schneider Modicon AS-BDAP-204 SEALED Compact Out ASBDAP204

Schneider Modicon AS-C184-004 USPP ASC184004

Schneider Modicon ASHDTA201 Compact Subrack AS-HDTA-201

Schneider Modicon /Modicon/Input Module AS-BDEO-216/DEO

Schneider Modicon Input Module AS-B825-016

Schneider Telemecanique TSX P57303AM TSXP57303AM

SCHNEIDER AEG DEP215 AS-BDEP-215 MODICON INPUT MODULE 65

PVDM3-64 CISCO 64 -Channel Voice and Video DSP Module

Siemens 6ES5441-4UA14 Simatic Output Module Repaired

SIEMENS 6DD1661-0AB0 COMMUNICATION MODULE

Johnson Controls NU-NCM201-1 NUNCM2011 Network Communication Module -

SIEMENS Simodrive 6SN1135-1BA12-0CA0

SIEMENS Sinumerik 840C Interface 6FC5103-0AD13-0AA0 GWE 570080924900 Ver C

SIEMENS MOORE PRODUCTS 16353-52 I/O EXPANDER BOARDNIB

Allen-Bradley RediPanel Push Button Module2705-P21J1

52002 YOKOGAWA shading pipes type colorimeter

ABB SAFT 110 POW 57411414, , 57411414,

A06B-0148-B177#7076 FANUC SERVO MOTORS REMANUFACTURED

700' Hollins 3/0 3/0 1/0 Aluminum URD Wire RHH RHW Triplex

PERCEPTRON 911-0025 USPP 9110025

ALLEN BRADLEY 1775-MR8 NSFP 1775MR8

ALLEN BRADLEY 1336S-B020-AE-ES5 USPP 1336SB020AEES5

GENERAL ELECTRIC DS3800HPBC USPP DS3800HPBC

TELEMOTIVE 18027 NSPP 18027

SST 5136-DNP-MUL USPP 5136DNPMUL

DATALOGIC MX400-1000 USPP MX4001000

Siemens 6ES5 955-3LC13 6ES59553LC13

SIEMENS 6ES5 100-8MA01 6ES51008MA01

SIEMENS 6ES5-777-0BB00 NSPP 6ES57770BB00

Siemens 6ES5 524-3UA15/6ES55243UA15 FACTORY SEALED OFFERS ACCEPTED

Siemens 6AV7803-0AB10-1AB0 Membrane Keypad

Siemens LOGO! 12/24RC 6ED1052-1MD00-0BA3

Roland SONAR V-Studio 700 System CERTIFIED FROM DEALER to USA

Telemecanique TSXDET1604

SIEMENS SIMATIC S5 INTERFACE MODULE 6ES5 316-8MA12

Wago 750-466 2-CHANNEL ANALOG INPUT MODULE

Siemens 6UG4615-1CR20

Modicon AS-S290-021

Schneider Modicon DEP216/AS-BDEP-216 DISCRETE INPUT XLNT

Schneider Modicon AEG/ AS-B805-016 115 VAC Input ASB805016

Schneider Modicon AS-B875-102 ANALOG INPUT NICE

Schneider Modicon AS-516P-002

Schneider Modicon INPUT MODULE ASB805016 FOR PARTS AS-B805-016

Schneider Modicon AS-M680-008 Memory Module 8K

Schneider Automation Inc AS-BDAP-216N ASBDAP216N Output Module Sealed

Siemens 505-4232A Input Module 79-132V

RELIANCE ELECTRIC 80281702RA USPP 80281702RA

Siemens 6FX1130-6BA00 Output Module

SIEMENS SINUMERIK OP015 OP 015 6FC5203-0AF03-0AA0 NIB

PROSOFT 3100-EMC COMMUNICATION INTERFACE MODULE

SIEMENS Profibus-DP 6SN1114-0NB01-0AA0

SIEMENS TERMINAL STRIP CONNECTOR BOARD 6FC9302-2AA 6FC93022AA USMT MILL CNC

SIEMENS 6FC3-061-1EA-Z USPP 6FC30611EAZ

AllenBradley1794-OA8/AFlexI/O120VACOutputModuleB01

ALLEN BRADLEY SWING ARM CATALOG NO. 1771-WA / QTY 10

ABB KP-20 KP20 2000 Amp 2000A Air Breaker MPS-C 2000

ZF-500A-24V ZF500A-24V ZEFINE 1 PC - ORIGINAL

(T3-1) 1 BALDOR ID15H207-E DRIVE T3-1

MIYACHI MM-730 USPP MM730

ALLEN BRADLEY 1370AR-COB72-E USPP 1370ARCOB72E

GENERAL ELECTRIC DS215KLDCG1AZZ03B NSFP DS215KLDCG1AZZ03

FORNEY 35539571 NSFP 35539571

SIEMENS 6ES7-317-6FF00-0AB0 NSFP 6ES73176FF000AB0

ROMAN MANUFACTURING DC-2495 USPP DC2495

VIDEO JET 370100 USPP 370100

Siemens 6ES5 526-3LG11 6ES55263LG11

Siemens CONTROLLER CARD 6ES928-3UB12

SIEMENS 6ES5-454-4UA11/6ES5454-4UA11 OUTPUT MODULE NIB

Siemens 6ES5 376-1AA11 USPP 6ES53761AA11