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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。

SIEMENS 6ES7-414-2XJ01-0AB0 USPP 6ES74142XJ010AB0

ALLEN BRADLEY 5130-KAA USPP 5130KAA

GETTYS M139H60A-90AF NSFP M139H60A90AF

AMPROBE CT50-1 USPP CT501

INDRAMAT TDM1.2-50-300-W1 USPP TDM1250300W1

SQUARE D 8940-SSF4100-V06 NSFP 8940SSF4100V06

KUKA BMC-15/90KB USPP BMC1590KB

CUTLER HAMMER ECN1801CJC NSFP ECN1801CJC

Siemens 6ES5 095-8MC03 6ES50958MC03

Siemens 6ES5-463-4UA12 USPP 6ES54634UA12

SIEMENS 6ES5 931-8MD11 6ES59318MD11

SIEMENS S5 6ES5 701 1LA12 6ES5 701-1LA12 Subrack ER1

Siemens Simulator Input Module 6ES5 490-75A11 WOW

Siemens 6ES7314-1AE04-0AB0

Siemens Simodrive 611 6SN1118-0NJ01-0AA1

Siemens 6ES5243-1AB12

HP ProCurve Switch FL 10-Ports 100/1000BaseT Interface Module J8734A

XpressKIT Interface and Bypass Modules from Directed Electronics DBALL

SIEMENS 6ES5-095-8MA02 6ES5095-8MA02 CPU

Siemens Micromaster 6SE6 400-0AP00-0AB0 Advanced Operator Panel

Omron CJ1M-CPU12

Schneider Modicon AS-BDEP-217 ASBDEP217 24VDC Input LNC

Schneider Modicon AS-212P-110 USPP AS212P110

Schneider Modicon AS-J812-000 NSFP ASJ812000

Schneider Modicon AS-4863-026 Sandwich Pack Processor Board (UGC)

Schneider Modicon DEP 210 DEP210 AS-BDEP-210 DISCRET INPUT

Schneider Modicon /AS-P420 Power Supply ASP420 UGC

Six Input Type B Sensor Module

Schneider TSX Quantum 140 DAO 853 00 140DAO85300 in Box Open Seal

Siemens Teach Pendant Programmer 6FX2007-1AB13

SIEMENS 505-4908 OUTPUT MODULE 5054908

SIEMENS Sinumerik 800M. 6FC3986-3EU Operator Panel.

Devantech USB-RS485 Communications Module DMX512 Transmitter

SIEMENS Simodrive FM Stepdrive 6 SN1 227-2ED10-0HA0

SIEMENS SIMODRIVE 6SN1145-1BA01-0BA1SINUMETIK 840D NCU-BOX 6FC52476FC5356 2ZH

Advantech ADAM-5060

ALLEN-BRADLEY 77131-015-51 Hardware Kit

ABB 3BSE010535R1 SE02354560 PM645B (3BSF 010 535 R1 )

ACCURAY 064844-001 USPP 064844001

A06B-6079-H101 FANUC DRIVES

8000XLCVD TOSHIBA MONITORS CRT REMANUFACTURED

SIEMENS 6AV77271BB100AC0 NSFP 6AV77271BB100AC0

ALLEN BRADLEY 9324-RLC300ENE NSFP 9324RLC300ENE

ALLEN BRADLEY 6180-FLLEGLZZHCZ USPP 6180FLLEGLZZHCZ

KEYENCE CORP WD310 NSFP WD310

GETTYS M113-A10K-900B NSPP M113A10K900B

YASKAWA ELECTRIC USAMED-30MA2T NSFP USAMED30MA2T

OMRON F10-S50R USPP F10S50R

Siemens 6ES5-314-3UA11 USPP 6ES53143UA11

SIEMENS 6ES5 432-4UA12 6ES54324UA12

SIEMENS S5 6ES5 701-1LA12 Extension Sub-Rack 9-slots

Siemens Input Module 6ES5 318-8MB12 working

SIEMENS 6ES7 223-1HF00-0XA0 in Sealed Box

Siemens OP37 6AV3637-1LL00-0FX1 Membrane Keypad ping Worldwide

QX41 Mitsubishi PLC 32 Point DC Input

GENICOM CA20160-B81X SERIAL INTERFACE MODULE

Texas Instruments Field Interface Module 505-7201

SIEMENS 220uF 450V Capacitor 36 x 36mm

Siemens EM277 6ES7 277-0AA22-0XA0 6ES72770AA220XA0 NIB

Modicon PC-0984-685

Schneider Modicon Model AS-B558-001 Output Module

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

Schneider Modicon AS-C484-266 USPP ASC484266

Schneider Modicon AS-J812-000

Schneider Modicon AS-H827-100 11 Slot Rack Chassis

Schneider Modicon J892 REMOTE I/O PROCESSOR MODULE AS-J892-001

Schneider Telemecanique USB to RS485 Converter TSXCUSB485 in box

Schneider Modicon TSXMRPP128K

PSC Falcon 4220 Windows CE .NET PDA

Siemens 6ES5 816-0AA11 6ES58160AA11 Fast Shipping

SIEMENS 6DD1-682-0BE0 USPP 6DD16820BE0

Indramat Communication Module RMK12.2-IBS-BKL 25965

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

SIEMENS Sinumerik 820G 6FC3801-3AC-Z 6FC8504-1AX00 CRT Monitor Operator Panel

SIEMENS MOORE PRODUCTS 15736-66-2 PC BOARD RFB

Allen-Bradley Panelview 900 Cat 2711-K9A1 706HT

5389 OMEGA MOBILE CORDER DATA LOGGER RD MV-208-2 2005

ABB SERVO MOTOR 3HAC17336-1/01

A06B-0153-B075#0008 FANUC SERVO MOTORS REMANUFACTURED

700pcs Mitsubishi InGaAsP-MQW-FP 1310nm 7mw Lens-Cap Laser Diode ML720J8S-25A

QUALITROL IDM-T2-IDM-DAU-DFRO-U/G NSPP IDMT2IDMDAUDFROU

ALLEN BRADLEY 1785-L20C USPP 1785L20C

ALLEN BRADLEY 1336VT-B015-EAN-FA2-L1 USPP 1336VTB015EANFA1

GENERAL ELECTRIC DS3800NEPA1E1D USPP DS3800NEPA1E1D

TEXAS INSTRUMENTS PLC 6EA1710-0AA00-2AA1 USPP 6EA17100AA002AA1

STRONGARM 502-LM2000-242108 USPP 502LM2000242108

ENGELHARD 2051 NSFP 2051

Siemens 6ES5-095-8MA03 USPP 6ES50958MA03

SIEMENS 6ES5 306-7LA11 -- 6ES53067LA11

SIEMENS 6ES5-910-0AA USPP 6ES59100AA

Siemens 6ES5 700-8MA11/6ES5700-8MA11 BUS MODULE LOT OF 10 XLNT

Siemens 6DS1731-8EA 6DS17318EA in Box, Seal opened,

Siemens LOGO! 24RCL PLC 6ED1053-1HB00-0BA2

RME HDSPE PCI EXPRESS CARD INTERFACE MULTIFACE DIGI

Telemecanique TSXRAM328

SIEMENS-CB15 6SE3290-0XX87-8PB0 Profibus interface module

Wago 750-337 CANopen Fieldbus Coupler

Siemens 802SE Membrane Keypad

Modicon AS-S978-000

Schneider Modicon AUTOMATION TSX COMPACT DAP 216N AS-BDAP-216N OUTPUT MODULE

Schneider Modicon AEG/GOULD// AS-C480-000 CPU CARD/PC BOARD XLNT

Schneider Modicon AS-B882-239 NSFP ASB882239

Schneider Modicon AS-884A-301

Schneider Modicon Output Module 8PT AS-BDAP-210

Schneider Modicon AS-P120-000 power supply

Schneider Automation Inc 140 DAO 842 10 140DAO84210 Output Module

SIEMENS 500-5001 INPUT MODULE 5005001

RELIANCE ELECTRIC 45C-201C USPP 45C201C

SIEMENS 6ES7-390-1AB60-0AA0 NSFP 6ES73901AB600AA0

SIEMENS Sinumerik Simodrive Drives Rack 6SC 6101-4A-Z

ONSTAR COMMUNICATION MODULE OPTION UE1 20833262

SIEMENS Simo 6SN118-0AD11-0AA1 Module

SIEMENS SINUMETIK 840D NCU-BOX 13A 6FC5247-0AA00-0AA26FC5356-0BB11-0AE0

SIEMENS Sachs Kit Clutch Jeep CJ5 68 CJ6 FC150 66 65 64 63 Dispatcher 67 62 Car Auto

AllenBradley1771OW16/BElectromechanicalContactOutputModule

Allen Bradley SLC500 Output Module 1746-OX8 Series A

ABB NBRA-656 ( , s From USA) (60 )

ZOLTMAN AD-1-G4M769 USPP AD1G4M769

(X7-5) 1 MICRO MOTION 1700113ABAEZZZ TRANSMITTER & MASS FLOW SENSOR X7-5

MODICON 372-SPU-78001PSTE NSFP 372SPU78001PSTE

ALLEN BRADLEY 1392-B100-RK-MC-A-H-D1 USPP 1392B100RKMCAHD1

GENERAL ELECTRIC FVK37ED6 USPP FVK37ED6

FOXBORO FX-135TG NSFP FX135TG

SIEMENS 6FM1-470-3AA25 USPP 6FM14703AA25

SCP 00033330-00 USPP 0003333000

YASKAWA ELECTRIC CIMR-V7CU47P5 NSFP CIMRV7CU47P5

Siemens 6ES5 615-0UA11 6ES56150UA11

Siemens Positioning Module 6ES5 266-8MA11 SURPLUS OPENED BOX

SIEMENS 6ES5456-7LA11 6ES5 456-7LA11S5-115U 456-7 Digital Output

Siemens 6ES5 420-8MA11 USPP 6ES54208MA11

Siemens S5 PLC 6ES5 306-7LA11 Interface Lead

Siemens CPU 221 6ES7 211-0BA23-0XB0 6ES7211-0BA23-0XB0

Sharp JW50H JW-50CUH JW50CUH Control Module

Square D 8030 PS-30

SIEMENS 3RK2200-0CE02-0AA2 INTERFACE MODULE 3RK22000CE020AA2 BRAND

WE SHIP SAME PVDM2-32 CISCO 32-channel Packet Fax/Voice DSP Module

Siemens 6GF1018-2AA Vision Sensor

Siemens TP177A 6AV6 642-0AA11-0AX1 Protective Film

Schneider Modicon SEALEDAUTOMATION DTA200/AS-HDTA-200

Schneider Modicon AS-BDEP-220 INPUT MODULE ASBDEP220

Schneider Modicon AS-B804-116 OUTPUT MODULE 115VAC

Schneider Modicon LOCAL I/O INTEFACE EXPANDER MODEL AS-J200-001

Schneider Modicon AS-J890-001

Schneider Modicon AS-B875-101 Analog Input ASB875101 An In

SchneiderElectricXBTGT4330Panel

SIEMENS 6ES7 331-7PF11-0AB0 INPUT MODULE 6ES73317PF110AB0

SBI-7126T-T1L 2TB SATA Blade Server 2x 2.53GHz Nehalem

Siemens HMI 6AV6 642-0BD01-3AX0 NIB 6AV66420BD013AX0

SIEMENS Sinumerik 6FX1151-1BC01 Videoint Col .

Siemens 6GK1543-0AA01 Communication Processor Module SIMATIC with Warranty

SIEMENS 6SN1130-1AA11-0CA0 NSFP 6SN11301AA110CA0

SIEMENS 6SN1118-0NH01-0AA0 6SN1 118-0NH01-0AA0 SIMODRIVE 611-U Control Unit QTY

SIEMENS 6FC5-203-0AB12-0AA0 USPP 6FC52030AB120AA0

AllenBradleyPanelviewPlus10002711P-RDK10C/B2711PRDK10C

Allen nBradlet 1771-OAD C Rev E01 AC Output Module

ABB DRAW-OUT KIT CAT#K7WR-H REAR CONNECTION S7 HORIZONTAL NIB

Adept Technology 90400-81021 EXC Controller Robot

(6846) Reliance Electric High Speed Driver 0-54200-3 (6846)

INDRAMAT TDM1.2-050-300-W1-000 NSPP TDM12050300W1000

WESTINGHOUSE 4D14854G02 USPP 4D14854G02

FANUC A06B-6059-H003 NSFP A06B6059H003

DYNAVISION S-16-24 USPP S1624

RELIANCE ELECTRIC 801429-1SD USPP 8014291SD

NIPPON DENSO US-241 USPP US241

NACHI MDM212HIV USPP MDM212HIV

Siemens 6ES5 431-4UA12 6ES54314UA12

Siemens 6ES5-900-7AD11/6ES5900-7AD11 CONTROL MODULE XLNT

SIEMENS 6ES5-381-7AA11 USPP 6ES53817AA11

Siemens 6ES5 430-8MC11

Siemens S5 6ES5 308-3UB11 6ES53083UB11 Interface Module

Siemens 6SE7038-6GL84-1JB0 6SE7 038-6GL84-1JB0 FreeShip

Siemens 6ES7 334-0CE01-0AA0 -- 6ES73340CE010AA0

Siemens PC612-B2200-R963

Mitsubishi AJ71UC24 Melsec Ethernet Interface Module AJ71-UC24

WS-X6502-10GE CISCO 6500 10 GIGABIT ETHERNET BASE MODUL

Siemens 6ES7 361-3CA01-0AA0 6ES7361-3CA01-0AA0

Siemens Profibus DP 6ES7972-0BB50-0XA0 NIB

Reliance 0-56308-1

Schneider Modicon / 3M Cable Assembly AS-W808-002 _ ASW808002 Groupe /

Schneider Modicon AS-B239-001 NSFP ASB239001

Schneider Modicon AS-P930-004 USPP ASP930004

Schneider Modicon AS-B825-016 INPUT MODULE 800 I/O 24VDC TRU HI IN 16PT

Schneider Modicon AS-B556-000 OUTPUT MODULE 5V TTL

Modicon Output Module 8PT AS-BDAP-210

SIEMENS SIMATIC 6ES54007AA13 INPUT MODULES-

SIEMENS 6ES5-482-8MA12 I/O MODULE DIGITAL 32 PT 24VDC

Siemens SCD1597 6AV8100-1BB00-1AA1 LCD Touch Screen

SIEMENS 6DD1-681-0AJ0/6DD1681-0AJ0 PHOENIX CONNECTOR NIB

SIEMENS SINUMERIK 800 6FX1128-1BB00 6FX11281BB00

SIEMENS 6SN1-111-0AA01-1BA0 NSFP 6SN11110AA011BA0

SIEMENS Simodrive 6RB2000-0NE00 - B Modified Control Board

SIEMENS 6FC9348-7HX NSFP 6FC93487HX

Advantech DO MIC-2752 32ch. Output NIB

ALLEN-BRADLEY 1771-OGD TTL OUTPUT MODULE

ABB ACS600 ACS61100605D00Z1200003 VFD Drive Motor Controller

ACUMENT PCI VISION CARD REV5.2021-0133-0607/ P/N 10021 TESTED/ CONDITION

6ES7467-5GJ00-0AB0 6ES7467-5GJ02-0AB0 Brand , Factory Sealed,

900' Pratt 250 250 3/0 250MCM Aluminum URD Wire Direct Burial XLP USE

SQUARE D ME36800LS1021 USPP ME36800LS1021

COMPUMOTOR 3000-3-P-E USPP 30003PE

BAUMULLER BUG20-120-31-B-010 USPP BUG2012031B010

MODICON S79G-S00-P010 NSFP S79GS00P010

LUTRON XPS20-2774ML-20 NSPP XPS202774ML20

EG&G TORQUE SYSTEMS C0502-001D USPP C0502001D

Siemens 6ES5 103-8MA03 6ES51038MA03

Siemens 6ES5-465-3AA12 USPP 6ES54653AA12

SIEMENS 6ES5 956-0AA12 6ES59560AA12

SIEMENS S5 6ES5-318-8MB13 ET200U

Siemens S5-100U 6ES5 420-8MA11 E6S5420 Digital Input Module

Siemens 6ES7331-7KB00-0AB0 NIB

SIEMENS SINUMERIK 6FC5203-0AF02-0AA1 , no box,

Siemens 6ES5312-5CA12

IBM MT2107 Fibre Interface FICON Adapter Module 24R1058

Xpresskit XK510 interface module by Directed Electronics Viper Python Avital

Siemens 6ES5441-8MA11 6ES54418MA11

Siemens MP270 6AV6 542-0AH10-0AX0 Membrane Keypad

Omron E3N2-D2Y4B-US

Schneider Modicon AS-BDAP-210 DISCRETE OUTPUT MODULE

Schneider Modicon AS-506P-002 USPP AS506P002

Schneider Modicon AS-J890-101 I/O INTERFACE PROCESSOR ASJ890101

Schneider Modicon AS-516P-006 Processor Board Rev C21 (UEX)

Schneider Modicon EK-489 DTA201 RACK W/CARDS 2EA DAP 210/AS-BDA

Schneider Modicon -AS-5540-000

SIEMENS/TI/CTI 505-4216A INPUT MODULE 110VAC 16PTXLNT