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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 223-1PH21-0XA0 6ES7223-1PH21-0XA0 NIB

Siemens Connector 6ES7392-1AJ00-0AA0 in Sealed Box

Muco EK-630

Schneider Modicon AS-884A-311/AS884A311 CPU Controller OFFERS ACCEPTED

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

Schneider Modicon AS-M485-008 USPP ASM485008

Schneider Modicon 24VDC 32 POINT INPUT MODULE MODEL AS-B827-032

Schneider Modicon DISCRETE INPUT AS-BDEP-216 ~ QTY X 6

Schneider Modicon AS-J812-000 Remote I/O adapter J812

Schneider Electric MPCKT55NAX20N Magelis Compact PC 15 Inch Touchscreen

Siemens 6ES5 421-8MA12 Digital Input Module NIB

Rev 1.1 SuperMicro H8DAE-2 Bulk Pack MB Support Dual Core CPU

SIEMENS 9510DC-1156-AEZA/9510DC1156AEZA ION ACCESS DISPLAY NIB

SIEMENS Sinumerik Module 6FX1120-5BA01 E Stand E & 00

ProSoft Technology 3150-MCM Modbus Communication Module SLC-500 1747-KE

SIEMENS FILTERMODULE POSMO 6SN2414-2TX00-0AA1

SIEMENS SINUMERIK 802D 6FC5603-0AD00-0AA1 6FC56030AD000AA

SIEMENS 6FC3984-3RA 6FX1124-6AD02 I/O Module - Used

AllenBradley2711-B6C10/C2711B6C10

Allen Bradley Terminal Keyboard 1770FD PLC Overlay 1770-KBA PN 610716-01

ABB IRB 7600 SER 76-27020 ROBOT S4C PLUS CNTRLR TEACH PENDANT W/ MATCHED SET

Advanced Research - System 31-05 - 30A Ground Bond w/ 5kVAC HiPot Testing Units

(Q7-1) 1 ALLEN BRADLEY 1336F-B030-AN-EN-HAS2-LA2-L6-MX3 FREQUENCY CONTROL Q7-1

MICROSWITCH 82114805-501 USPP 82114805501

ALLEN BRADLEY 1336S-B030-AA-EN-HA1-L6 USPP 1336SB030AAENHA1

GENERAL ELECTRIC 193X-530BBG01 NSFP 193X530BBG01

FANUC A20B-0010-0100 USPP A20B00100100

SIEMENS 6ES5-512-5BC21 NSFP 6ES55125BC21

RELIANCE ELECTRIC 9101-0378 USPP 91010378

STI MS4460B-2-X USPP MS4460B2X

Siemens 6ES5 482-7LF11 6ES54827LF11

Siemens 6ES5-955-3LC14 USPP 6ES59553LC14

SIEMENS 6ES5-451-4UA11 6ES54514UA11 DO

Siemens 6ES5 306-7LA11/6ES5306-7LA11 INTERFACE MODULE RFB

Siemens S5 Digital Input / 6ES5 421-8MA12 8xDC

SIEMENS C98043-A7001-L2 6RA70 CUD1 CONTROL BOARD

Siemens 6ES5 451-4UA13 -FS- 6ES54514UA13

Square D 8030 CRM-232

Samsung Samsung DCS SIM Serial Interface Module KT40D-B10-XAR 1-year warrty

WOODWARD NETCON 5000 5466-031 REV D I/O CONTROLLER

Siemens 6ES7431-7QH00-0AB0 6ES7 431-7QH00-0AB0

Siemens Supply Fuse 3NA3820-2C 50A

Schleicher USP 2A U 31507501 622 114

Schneider Modicon ASHDTA201Compact Subrack AS-HDTA-201

Schneider Modicon AS-B558-001 USPP ASB558001

Schneider Modicon AS-W922-008 NSFP ASW922008

Schneider Modicon AS-C484-266 ASDC484266 Programmable Controller

Schneider Modicon AS-B833-016 / B833 / ASB833016 =

Modicon 864 Register Output Module AS-B864-001

SIEMENS Analog Input Module 6ES5465-4UA13 NIB Opened

SCHNEIDER TSXDMZ28DR TSX MICRO PLC I/O MODULE QUANTITY

SIEMENS MOORE PRODUCTS 15853-12-1 LINK FACE BOARD NNB

SIEMENS Sinumerik 6FC9302-2BB-01 Terminal Blocks.

Singer CSM-1 Communication Service Monitor

SIEMENS 6SN1123-1AA00-0CA1 Simodrive LT-Module INT.50A Version A

SIEMENS 6SN1145-1BA01-0BA1 SIMODRIVE UIB

SIEMENS 6FC5235-0AA05-1AA2 FLOPPY DISK DRIVE BOX IPC SINUMERIK EXTERNAL

Allied Electronics Crydom 691-0140 G40DC5 Logic Module G4 DC Output 60VDC 3A

ALLEN-BRADLEY 1400E 2711E-K14C6 SER A REV B PANELVIEW TERMINAL

ABB BIAC-1000-570-03400

ADEPT TECH 30330-15000 USPP 3033015000

(3)GOULD BREAKER TYPE K-600S FRAME SIZE 600A /SOLID STATE TRIP ITE TYPE SS

INDRAMAT KDS1.1-150-300-W1-115 USPP KDS11150300W1115

TEXAS INSTRUMENTS PLC 565-2820 NSPP 5652820

FANUC A06B-0502-B001 USPP A06B0502B001

CUTLER HAMMER LD3600 NSFP LD3600

RELIANCE ELECTRIC 11C85K NSFP 11C85K

MOORE PRODUCTS 39ACM14CAN USPP 39ACM14CAN

KEYENCE CORP LB-01/LB-60 NSFP LB01LB60

Siemens 6ES5 374-2FL21 6ES53742FL21

Siemens 6ES5-700-0LA12 USPP 6ES57000LA12

SIEMENS 6ES5-375-0LD11 NSPP 6ES53750LD11

Siemens 6ES5 375-1LA21 Memory Submodule 16k

Siemens CPU Mod 6ES5 927-3SA12 6ES5927-3SA12

Siemens 6SE6420-2UD23-0BA1 6SE64202UD230BA1

Siemens TP27-6 6AV3627-1NK00-2AX0 Touchscreen Glass

Siemens 6FM1470-7AA25

Measurement Technology LTD MTL 8512-IF-HA HART Interface Module

XYCOM 70240-001 REV 1.1 I/O MODULE VME BOARD

Siemens 6ES7 291-8GF23-0XA0 64K Memory Card NIB

Siemens PC/MPI+ PC MPI+ PLC Programming Serial Cable

Reliance 0-51847-2

Schneider Modicon AS-B351-001 ASB35101 AC Input NIB FS

Schneider Modicon AS-9900-040 USPP AS9900040

Schneider Modicon AS-P453-632 USPP ASP453632

Schneider Modicon AS-B804 -116 NICE

Schneider Modicon AS-B231-501

Modicon PanelMate Plus PM Plus 1000 MM-PM10300C 24VDC

SIEMENS SIMATIC S5 6ES5 6ES5436-4UA12 VPE5 PLC DIGITAL INPUT MODULE 51922

Siemens 6ES7 331-1KF01-0AB0 6ES7331-1KF01-0AB0 SM331 Analog Input

Siemens Simatic Digital Output Module S5 6ES5 440-8MA21

SIEMENS 6DD1607-0CA1 6DD1 607-0CA1 in Box Free Ship

SIEMENS Sinumerik Power Supply 6EW 1861-3AB E Stand G

SIEMENS MINT 6SN1123-1AA00-0CA1 6SN11231AA000CA1 Servo

SIEMENS Simodrive 6SN1118-0DG13-0AA0 6SN11180DG130AA0

SIEMENS Control Rack 6FC3761-1FB Z_ Genumerik 3G Unit Sinumerik

Able Reducer VRKF-15C-200 Gear Ratio 1:15

ALLEN-BRADLEY 2706-D21J2 OPERATOR INTERFACE DATALINER

ABB ACH550-UH-059A-4 ADJUSTABLE FREQUENCY AC 40HP 480V-AC MOTOR DRIVE B227968

ACTERNA TTC T-BERD 2209 HANDHELD T1 DS3 TEST SET A+++

6ES7314-6CF02-0AB0 6ES7314-6CG03-0AB0 Brand , Factory Sealed,

882I60930 Marposs GUAGE T5

SIEMENS 6SE9-531-4DK40 NSFP 6SE95314DK40

BARDAC PLX145/330 USPP PLX145330

AVG UTICOR 100G-UT15T3R1 USPP 100GUT15T3R1

MODICON AS-C184-004 USPP ASC184004

IRCON 622F15011220000 USPP 622F15011220000

BROWNING 18HSB1-LR10 USPP 18HSB1LR10

Siemens 6ES5922-3UA11 6ES5 922-3UA11 6ES5922 3UA11 brand top!

Siemens 6ES5-456-4UA12 USPP 6ES54564UA12

SIEMENS 6ES5 752-0AA43 6ES57520AA43

SIEMENS S5 6ES5 464-8MA11 6ES54648MA11 Input

Siemens S5-100U6ES5 100-8MA02 CPU 100

Siemens 6ES7214-2AD23-0XB0

Siemens Simatic 6ES5 095-8MB01 6ES5095-8MB01

Siemens 505-6208A

Hp 81531A Optical head interface module

Wieland Bamberg WEB-1001 EGM Encoder Interface Module

SIEMENS 6ES5 375-0LC21 6ES53750LC21

Siemens LOGO! PC CABLE 6ED1 057-1AA00-0BA0 PC-LOGO

Omron C200H-ID212

Schneider Modicon AS-H827-103 Gould 11 Slot 800 Series Rack

Schneider Modicon Analog Output Module AS-BDAU-202

Schneider Modicon AS-J200-001 USPP ASJ200001

Schneider Modicon MODICON/ AS-W808-002 CABLE ASSEMBLY REMOTE I/O SIG XLNT

Schneider Modicon AS-M480-004

Schneider Modicon TSX Compact M AS-BDAP-218 ~ SURPLUS~

SMCSI EX250-IE3 DEVICENET INPUT MODULE

Schneider Telemecanique XB4-BL42 Push Button Switch

SIEMENS TI 505-4908 RELAY OUTPUT MODULE

Siemens 6AV3 545-0CC10-0AX0 6AV3 5450CC100AX0 Panel

SIEMENS SINUMERIK 6FX1122-1AA01 COUPLING MODULE

ESI LASER TIMING/COMMUNICATION MODULE BOARD CKA 63116

SIEMENS SIMODRIVE PERM.MAGNET MOTOR 1 FT5036-0AH01-9-Z

SIEMENS SIMODRIVE 6SN1145-1BA02-0BA1SINUMETIK 840D NCU-BOX 6FC52476FC53562ZM

Allen-Bradley 800T-B6 30.5mm Type 4/13 Push Button Red

ABB 15 KV Advac Panel Vacuum Circuit Breaker Cell Medium Voltage DPU PT complete

ACC, DIFFERENTIAL MULTIPLEXER, 40 CH, 7702 2074767

A06B-6058-H322 FANUC SERVO AMPLIFIER REMANUFACTURED

8" LCD 800x600 Video Zoom Microscope 3.3x-147x Without Stand

SHIMADZU 4826 USPP 4826

ALLEN BRADLEY 803-A12 USPP 803A12

ALLEN BRADLEY 3500-P72 NSPP 3500P72

INVENSYS T-27MARKII NSFP T27MARKII

GENERAL ELECTRIC DS3800HRMB1G1D USPP DS3800HRMB1G1D

YAMATAKE J-HAM10 USPP JHAM10

MILLTRONICS 7ML1127-0EA21 NSPP 7ML11270EA21

Siemens 6ES5-305-7LB11 NSPP 6ES53057LB11

SIEMENS 6ES5 430-4UA13 6ES54304UA13

SIEMENS S5 6ES5 430-4UA13 Digital Input Module

Siemens Digital Input Module 6ES5 430-7LA12 27680

Siemens 6ES7 216-2AD23-0XB0 6ES7216-2AD23-0XB0 in Box, Seal Intact, FreeShip

SIEMENS OP270 6AV6 542-0CA10-0AX0 6AV6542-0CA10-0AX0

RELEASE SuperMicro X9DBL-IF Motherboard CHECK W/ US FOR AVAILABILITY

Texas Instruments 5TI-3000

Telenex PL-951-162-2 ISDN S/T/U Interface Module

TSXETY110 Modicon Premium TCP/IP TSX-ETY-110

Siemens DCS Module 6DS1901-8BA in Box, Seal opened,

Modicon MM-PMC1-400C

Schneider Modicon Gould AS-B875-111 ASB875111 I/O Analog Input PLC Module

Schneider Modicon ASBADU206 TESTED and GUARANTEED Compact Analog Input AS-BADU-206

Schneider Modicon AS-BSEA-020 USPP ASBSEA020

Schneider Modicon AS-C484-600

Schneider Modicon AS-BDAP-210 TSX OUTPUT MODULE NIB

Schneider Modicon I/O HOUSING AS-H8190199 ~ NS

SCHNEIDER Telemecanique Switch XB4 BVB1

Schneider Automation Inc 140 DDI 841 00 140DDI84100 Input Module Sealed

PWR-4000-DC 4000W DC POWER SUPPLY FOR CATALYST 6500/7600 1YR - ASK 4 Q

SIEMENS 6ES5-441-8MA11 PLC OUTPUT MODULE ""

SIEMENS 6DD1641-0AC0 EB11 DIGITAL I/O MODULE IN BOX

Lenze EMF2102IBCV003 Lecom-LI Communication Module EMF2102IBC-V003

SIEMENS Simodrive 6SN1130-1AA11-0BA0

SIEMENS SINUMERIK 840C NC CPU 6FC5110-0BB01-0AA2

SIEMENS Moore XTC Transmitter-Controller 340DBBSAAB NN213

ALLEN-BRADLEY SLC 500 1746-OB8 OUTPUT MODULE QUANTITY

ALLEN BRADLEY RIGHT HAND DOOR HARDWARE KIT 1494V-L3

ABB SACE PR231/P W/ BK15494 P4KLAM04006 OUT OF

A06B-0148-B175#0076 FANUC SERVO MOTORS REMANUFACTURED

7 Digiboard DBI A/N30000354 Full size I/O ISA card

PACIFIC SCIENTIFIC SC755A001-01 USPP SC755A00101

ALLEN BRADLEY 1771-NT1 FNFP 1771NT1

ALLEN BRADLEY 1336S-B010-AN-EN-GM1-L4 USPP 1336SB010ANENGM1

GENERAL ELECTRIC DS215SLCCG2AZZ01B NSPP DS215SLCCG2AZZ0B

TELEMECANIQUE ATV-66D23-N4 USPP ATV66D23N4

SQUARE D LC-26600AC USPP LC26600AC

CUTLER HAMMER AGSCH120N030040 NSFP AGSCH120N030040

Siemens 6ES5 951-7NB21 -- 6ES59517NB21

SIEMENS 6ES5-752-0AA23/6ES5752-0AA23 INTERFACE MODULE NIB

Siemens 6ES5 498-1AA41 USPP 6ES54981AA41

Siemens 6AV6642-0DA01-1AX1 OP177B No Box

Siemens LOGO 6ED1 055-1CB00-0BA0 in sealed box

RPS MKS ASTRON AX7685 GENERATOR

Telemecanique TSX1723428

Siemens Simatic 6ES7 151-1AA05-0AB0 6ES71511AA050AB0 Interface Module

Wago 750-478 2-CHANNEL ANALOG INPUT MODULE

SIEMENS 6SL3211-0KB13-7UA0 0.37KW 220V

Modicon AS-P801-001

Schneider Modicon DTA 200/AS-HDTA-200 DTA200ASHDTA200 Primary Subrack

Schneider Modicon ASB232501 Output Module AS-B232-501

Schneider Modicon AS-B875-011 8CH Analog Module ASB875011

Schneider Modicon AS-W922-015 GENERIC OEM CABLE ASW922015

Schneider Modicon Gould AS-C484-266 484 Controller Programmable

Schneider Modicon AS-J892-001 Communication Module ASCII 984/800 RI/O INTERFACE

SCHNEIDER AUTOMATION PM+ 1000 MODBUS PLUS INTERFACE NNB

SIEMENS 505-4332 MODULE DIGITAL INPUT 505 32IN 14-30VDC 5054332

RELIANCE ELECTRIC I/O PROCESSOR MODULE 45C200A

SIEMENS 7MH71561AA001AA MILLTRONICS SF500 INTERFACE NIB

SIEMENS SINUMERIK OP 032 6FC5203-0AB20-0AA1 NIB

Prosoft MVI56-ADM 'C' Communications Module MVI56DAM

SIEMENS Parameter Circuit Board 6SN1114-0AA01-0AA0

SIEMENS SIMODRIVE 6SN1145-1BA01-0BA1SINUMETIK 840D 6FC5247-0AA00-0AA26SN1123

SIEMENS 6FC3521-0AC-Z USPP 6FC35210ACZ

ALLENBRADLEY2706E43J128B1OPERATORINTERFACEDATA

Allen Bradley Terminal Board 9101-1779 Amphenol Connector /Sealed

ABB K - Line K-600S 600V 600A LI AIR CIRCUIT BREAKER

Zehntel 850 incircuit Test System Zehntel 810 ICT sold for parts

(SIEMENS) WARM BOOT 3RW4444-6BC44 good in condition for industry use

MITSUBISHI FRSX2-18.5K USPP FRSX2185K

ALLEN BRADLEY 1336VT-B050-EAS-FA2-L1 USPP 1336VTB050EASFA2

GENERAL ELECTRIC 6KDV3400Q2B20 NSFP 6KDV3400Q2B20

FLEXMATE INC 3-USP-G02 USPP 3USPG02

SIEMENS 6ES5-927-3SA12 USPP 6ES59273SA12