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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。

Adlink cPCI-8217 cPCI-8217-004 VGA/LCD Module

Allen-Bradley Panel View 600 Plus

ALLEN BRADLEY SLC500 115AC OUTPUT MODULE 1746-OA16 EUC TESTED GUARANTEED NO DOA

ABB ACS600 ACS61100605D00Z1200003 VFD Drive Motor Controller

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ASEA BROWN BOVERI EHN550C-1 NSFP EHN550C1

ASCO NP8321A5V-120 NSPP NP8321A5V120

MITSUBISHI A985GOT-TBD NSFP A985GOTTBD

INDRAMAT DKS01.1-W030B-DL01-00-FW USPP DKS011W030BDL010

ALLEN BRADLEY 3100-CPU USPP 3100CPU

SQUARE D 8538-SBA23V86AFF4T NSPP 8538SBA23V86AFF4

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AB 6690DS2 96213271 REMOTE I/O BOARD SER. C REV. P

AC Electric Motor Drive - 30 HP - 600 Volt - Three Phase Input

A06B-0501-B521 FANUC SERVO MOTORS REMANUFACTURED

75 HP MOTOR 1200 RPM W-DF280SNH FR BROOK HANSEN 45 KW BROOK COMPTON

RELIANCE ELECTRIC 803456-21T USPP 80345621T

ALLEN BRADLEY 3400-TFS USPP 3400TFS

ALLEN BRADLEY 1772-LXP NSFP 1772LXP

IAI XSEL-J-3-100I-60I-60IB-CC-EEE-2-2 USPP XSELJ3100I60I60I

XYCOM 9450-513316 USPP 9450513316

TOTAL CONTROL PRODUCTS TFTXXXXXT1A USPP TFTXXXXXT1A

GSE SCALE 200550-00000 NSPP 20055000000

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Texas Instruments 500-5030

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USON 403-X300G USPP 403X300G

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Schneider Modicon AS-BDEP-211 INPUT MODULE NIB

Schneider Modicon AS-P120-000 Power Supply

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Schneider Modicon ASB885002 GOULD MODULE AS-B885-002

Schneider Modicon /Gould AS-J474-001 Series 484 Slave Modem (UGC)

Schneider Modicon BDAP-209 8PT OUTPUT AS-BDAP-209

Schneider Modicon TSX PCX3030 TSXPCX3030 USB Cable NIB

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SIEMENS 6ES5470-4UC12 OUTPUT MODULE 8 POINT ANALOG

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Allen Bradley SLC 500 Output Module 1746-OV16 Ser. C

ABB ROBOT SERVO 3HAB 5760-1/06

A06B-0143-B075#0008 FANUC SERVO MOTORS REMANUFACTURED

0010-21788 Magnet

MODICON MM-PMC3-1TB USPP MMPMC31TB

ALLEN BRADLEY 150-A97NCD USPP 150A97NCD

ALLEN BRADLEY 1326AB-B3E-21 USPP 1326ABB3E21

GENERAL ELECTRIC 12BDD15A6A USPP 12BDD15A6A

SQUARE D 8538SFA23-V02S USPP 8538SFA23V02S

SIEMENS 6GK1-543-0AA02 NSFP 6GK15430AA02

AMETEK 2000 USPP 2000

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Siemens Simatic S5 6ES5 244-3AA21 6ES52443AA21 PLC Card

SIEMENS 6ES5-700-0LA11/6ES5700-0LA11 RACK XLNT

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SBE INC M68K10 USPP M68K10

Square D ATV66D16N4U

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Watlow PPC-2000 Anafaze Programmable Process Controller

Siemens 6SE7 090-0XX84-0FF5 DP Communication Card NIB

SIEMENS TP37 6AV36 37-1PL00-0AX0 Touchscreen Glass 10"

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Schneider Modicon AS-BADU-211 TESTED AND GUARANTEED Analog Input ASBADU211

Schneider Modicon AS-B832-000 USPP ASB832000

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Schneider Modicon AS-W953-012 USPP ASW953012

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Schneider PLC Output Module 140DD035300

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Roland VG-99 V-Guitar Multi Effects Processor System

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SIEMENS Sinumerik 840D Battery 6FC5247-0AA06-0AA0

Reliance Electric O-57404-1A O574041A Network Communication Module

SIEMENS BLOWER 6SN1162-0BA02-0AA2

SIEMENS 650 AC Simodrive 6SC 6101-4A-Z _ 6SC6101-4A-Z _ 6SC6140-0FE01

SIEMENS 6FC5-110-0DB02-0AA2 USPP 6FC51100DB020AA2

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Allen Bradley Versaview 1700p Integrated Display Computer Catalog 6181-17TPXPH

ABB ELECTRIC MOTOR LOW VOLTAGE 400V 3 PHASE 1470r/min MK3AA 180 L-4

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(L24) 1 EDMUNDS CAGQCM COMPUTER AIDED GAGING SYSTEM L24

LENZE EVS9328-ES NSPP EVS9328ES

ALLEN BRADLEY 1100-COD93 NSFP 1100COD93

GE FANUC 44A391790-G01 USPP 44A391790G01

FANUC A06B-0651-B003 USPP A06B0651B003

SICK OPTIC ELECTRONIC LUT1-431 USPP LUT1431

RELIANCE ELECTRIC 0-54200-4 USPP 0542004

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Siemens 6ES5 465-4UA12 6ES54654UA12

Siemens 6ES5-942-7UA13 USPP 6ES59427UA13

SIEMENS 6ES5-431-8MD11 NSPP 6ES54318MD11

Siemens 6ES5 700-8MA11 6ES5700-8MA11

Siemens S5 6ES5 700-8MA11 Bus Module

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Square D 8010 SPR-100

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WS-C6506 CISCO CAT 6506 CHASSIS 6 12RU W/1300W AC PS

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Schneider Modicon GOULD 115VAC INPUT MODULE CAT AS-B805-016

Schneider Modicon AS-B370-001 NSPP ASB370001

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Schneider Modicon AS-BDAP-209

Schneider Modicon AS-B817-116 115 VAC Isolated Input ASB817116

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SIEMENS INPUT MODULE 6ES7 321-1EL00-0AA0

SIEMENS 6ED1-053-1HH00-0BA1 NSFP 6ED10531HH000BA1

SIEMENS OUTPUT MODULE 6ES5-452-8MR11

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Texas Instruments Remote Communications Module w/ Modems 560-2126R E29

SIEMENS 6SN1118-0DJ23-0AA2 6SN1 118-0DJ23-0AA2 SIMODRIVE 611 Board

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ADEPT TECH 10300-15200 NSPP 1030015200

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HONEYWELL FF-SEDGE6G2 NSPP FFSEDGE6G2

TAYLOR ELECTRONICS 6227BZ10200F USPP 6227BZ10200F

DATA I/O 991-0014-054 USPP 9910014054

CONTROL TECHNIQUES MHM-490-CONS-0000 NSFP MHM490CONS0000

ORMEC SACDE04D2I USPP SACDE04D2I

MODICON 6390-042.248280 NSPP 6390042248280

GETTYS 16-0273-03 USPP 16027303

Siemens 6ES5 308-3UA12 6ES53083UA12

Siemens 6ES5-524-3UA12 USPP 6ES55243UA12

SIEMENS 6ES5-370-0AA41 NSFP 6ES53700AA41

Siemens 6ES5 100-8MA02 /S5-100U CPU 100 CPU MODULEXLNT

Siemens 6ES5-308-3UA11/6ES53083UA11 NICE

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YASKAWA ELECTRIC JAMSC-B2110 USPP JAMSCB2110

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Red Lion GEM 10000

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Schneider Modicon AS-884A 201 AS884A201 Fast Shipping

Schneider Modicon AS-MEEP-001 NSFP ASMEEP001

Schneider Modicon AS-B232-501 USPP ASB232501

Schneider Modicon AS-506P-008 Rev C10

MODICON/AEG OUTPUT MODULE MODEL DAP 217/AS-BDAP-217

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Telemecanique SCHNEIDER TSXDMZ28AR INPUT MODULE

SIEMENS SIMATIC S5 6ES5441-7LA11 DIGITAL OUTPUT MODULE 6ES54417LA11

SIEMENS / TI 505-4808 DISCRETE OUTPUT MODULE

SIEMENS Sinumerik Drive Board 6FX1122-1AA02 E Stand D & 00

SIEMENS 6SN1114-0AA01-0AA0 PARAMETER BOARD - SIMODRIVE 611A

SIEMENS Simodrive 6SN1123-1AB00-0HA1

SIEMENS monitor to LCD 6FC3988-7AF01 6FC4600-0AR04 SM0901

Advantech PCL-813B DAQ Card

Allen-Bradley 2711-M14 Monitor

ABB 57360001HG2 REP

Acomel 7114 C Chopper Board

Aaronia Spectran HF 60105 V4 RF Spectrum Analyzer -

85093A RF Electronic Calibration (ECal) Module, 3.5 mm

SIEMENS 6RA2-418-2FS22 NSFP 6RA24182FS22

ASEA BROWN BOVERI YB161102-BK USPP YB161102BK

ASEA BROWN BOVERI 57772280 USPP 57772280

MITSUBISHI HC-H703S-A42 NSFP HCH703SA42

INDRAMAT MAC090B-0-JD-3-C/110-A-0/S001 NSFP MAC090B0JD3C110A

ALLEN BRADLEY PC-670-0894 USPP PC6700894

TAYLOR ELECTRONICS 1701RZ14003C USPP 1701RZ14003C

Siemens 6ES5-434-4UA12 USPP 6ES54344UA12

SIEMENS 6es5 470-8ma12 smatic S5 analog card

SIEMENS L1 BUS TERMINAL 6ES5 777-0BC01

Siemens S5 6ES5 421-8MA12 Digital Input Module - 8DI24V

Siemens 6ES7 422-1BH10-0AA0 6ES7422-1BH10-0AA0

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ProCurve Switch 5412zl 96G J8700A

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VGA PS2 Keyboard Mouse Extended KVM Cable Adapter

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