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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 6ES7-331-7PF00-0AB0 6ES7331-7PF00-0AB0

Siemens TP27 6AV3 627-1QL00-0AX0

Square D 8020 SMM-710

Texas Instruments 505-4908

SIEMENS S5 6ES5 306-7LA11 INTERFACE MODULE IM306 QUANTITY

Xsigo VPE-MOD-10GE-1P Wired 10 Gigabit Ethernet Expansion Module for VP780 I/O

Siemens 6GK1502-4AB10 SINEC L2FO OLM

Siemens LOGO! 230RC 6ED1 052-1FB00-0BA5 6ED10521FB000BA5

Omron 3G2A5-OC224

Schneider Modicon AS-P120-000 PLC

Schneider Modicon LEVEL-3 16K 3CARD CHASSIS 584 AS-584A-320

Schneider Modicon AS-H819-100 USPP ASH819100

Schneider Modicon Gould/ AS-984A-008

Schneider Modicon AS-BDAP-218

Schneider Modicon REED RELAY OUTPUT MODULE AS-B840-108 REPAIRED

Telemecanique HMI to Allen Bradley Logix1000 Cable

Schneider TELEMECANIQUE Modicon TWDNCO1M

Siemens6AV6641-0AA11-0AX06AV66410AA110AX0Panel

Siemens 6AV6 545-0BA15-2AX0 6AV65450BA152AX0 Panel

SIEMENS Sinumerik 6FC5111-0CA02-0AA2 DMP KOMPAKT 16A 24V/0.5 E-Stand A

GE FANUC COMMUNICATIONS CONTROL MODULE IC693CMM311R

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

SIEMENS SINUMERIK 12.1" TFT OPERATOR INTERFACE PANEL 6FC5203-0AF02-0AA1

SIEMENS IBM 6400 Model 010 Printer Ribbons - IBM 6400 Model 10

ALLEN-BRADLEY DATALINER OPERATOR INTERFACE CAT2706-D21J8

A-B NIPPONDENSO 8500-B1C-L1B Motors-AC Servo [PZ4]

AC Motor Invertor - 30 HP - 600 Volt - Three Phase Input

A06B-0602-B027 GETTY'S DC SERVOMOTOR MODEL 20

750' Rider 500-500-350 USE Wire Direct Burial Aluminum Triplex

RELIANCE ELECTRIC S6R-9006 NSFP S6R9006

ALLEN BRADLEY 5250-LP3 NSFP 5250LP3

ALLEN BRADLEY 20AB070A0AYNANC0 NSFP 20AB070A0AYNANC0

INDRAMAT KDV1.3-100-115 USPP KDV13100115

YASKAWA ELECTRIC CACR-W57-FJ4ER USPP CACRW57FJ4ER

WESTINGHOUSE 292B315A19 USPP 292B315A19

IAI RCS-SSI-60-H-400-S-B USPP RCSSSI60H400SB

Siemens 6ES5-244-3AB31 USPP 6ES52443AB31

SIEMENS 6ES5 376-1AA31 6ES53761AA31

SIEMENS Interface Module 6ES5-312-5CA11

Siemens Analog Input Module 6ES5-460-7LA11

Siemens 6ES7 131-1BL01-0XB0 6ES7131-1BL01-0XB0 FreeShip

Siemens MP370 6AV6 545-0DA10-0AX0 Touchscreen Glass 12"

Reliance Automate 30 45C305A 45C305 Processor

Texas Instruments 505-4508

STATIC CONTROLS 920-M-2-V 4.3 INTERFACE DISPLAY MODULE

UBR7246VXR CISCO UBR 7246 4MC 2PA SLOTS 1YR - ASK 4 QTY

Siemens Control Board C98043-A1304-L Simodrive

Modicon AS-WBXT-201

Schneider Modicon NIBAutomation Output Module DAP 210/AS-BDAP-210

Schneider Modicon AEG/GOULD/MODICON/ AS-E381-902 EXECUTIVE CARTRIDGE XLNT

Schneider Modicon AS-BDEP-112 NSFP ASBDEP112

Schneider Modicon ASBDAP216 Compact Out Module AS-BDAP-216

Schneider Modicon -AS-500P-000

Schneider Modicon DAP 218 DAP218 Output Module AS B075-000 94V

Schneider Proximity Sensor XS530B1DAL2 NIB DC12-48V

SCHNEIDER MODICON TSX QUANTUM 115V AC INPUT MODULE 140 DAI 540 00

QX41 Mitsubishi PLC 32 Point DC Input

SIEMENS 6ES5456-4UA12 Digital Output Module NIB-FS

SIEMENS Sinumerik 802S 802C 802 5.7 inch LCD screen display

Mitsubishi AJ71UC24 Melsec Communication Module Link

SIEMENS SIMODRIVE 6SN1118-0NH11-0AA0

SIEMENS SINUMERIK CNC KEY BOARD 6FC5203-0AC00-0AA2

SIEMENS /MOORE QLCAMAAN QUADLOG CAM MODULE 16404-1/1

ALLEN-BRADLEY VERSAVIEW CE 1500H 6182H-15BRH4D 6189-RPRH LOGIC MODULE

Allen Bradley SLC 500 1746-OB16 Ser D Output Module 10-50VDC

ABB ROBOTIC DRIVE 3HAB-5845-1/2-DSQC334

A06B-0147-B075#0008 FANUC SERVO MOTORS REMANUFACTURED

01KA509430 RELIANCE DC MOTORS

NACHI AUXL-111 USPP AUXL111

ALLEN BRADLEY 1756-L53 NSPP 1756L53

ALLEN BRADLEY 1336-B015-EAE-S1 USPP 1336B015EAES1

GENERAL ELECTRIC 531X122PCNACG1 NSFP 531X122PCNACG1

SQUARE D S164N NSPP S164N

SIEMENS 6SE7021-0EA61 USPP 6SE70210EA61

BALDOR GHF2030BH USPP GHF2030BH

Siemens 6ES5 944-7UB21 6ES59447UB21

Siemens Simatic S5 6ES5 928-3UB11 CPU 6ES5-928-3UB11

SIEMENS 6ES5-701-1LA12/6ES5701-1LA12 9-SLOT EXPANSION RACK NIB

Siemens 6ES5 482-8MA13 I/O MODULE 6ES54828MA13

Siemens 6AV3607-1JC30-0AX1 OP7 in Box ping Worldwide

Siemens Inverter 6SE9521-0DC40

Samsung NP400B2B-A01US Notebook laptop 2.50 GHz 12.5" Screen Size 1.3 MP Cam

Syscon C400FJA3

SIEMENS Interface Module 6ES5310-3AB11 NIB Opened Compare @ 480.00

QUANTITY AVAILABLE SERIES A

Siemens 6SE7031-7HG84-1JA1

Siemens VAS5052A Touchscreen Glass

Schneider Modicon AS-BDAP-216N TSX Compact Current Source

Schneider Modicon ASB875101 Refurbished TESTED Analog INPUT Module AS-B875-101

Schneider Modicon AS-B846-002 MODULE ASB846002

Schneider Modicon 984 series of AS-B808-016 good in condition

Schneider Modicon Battery CELLS AS-5284-001

Schneider Modicon AS-H827-209 984 Series 11 Slot Rack ASH827209

Schneider Modicon PanelMate Plus 1000 MM-PM1030SC 92-01686-00

SIEMENS 6ES5 788-8MA11 Input Output Module

RME HDSPE PCI EXPRESS CARD INTERFACE MULTIFACE DIGI

siemens board 6FX1124-6AD02

SIEMENS Sinumerik DMP 16-E MODULE 6FC5111-0CA01-0AA0

RELIANCE ELECTRIC 57C404B COMMUNICATION MODULE NETWORK

SIEMENS CONTROLLER CARD 6SN1118-0NH11-0AA0

SIEMENS 6FC5-110-0BA01-1AA0 NSPP 6FC51100BA011AA0

AllenBradley2711-K9C9PanelView900SeriesARev.A

ALLEN BRADLEY VersaView 1200P TOUCH SCREEN OPERATOR INTERFACE 6181P-12TSXPH

ABB IMMOTION YGBF-20 FIELD CONVERTER EXCITER CONTROL MODULE 64G069D- 60835

Advanced Energy MDX Pinnacle DC Magnetron Power Supply AE 3152363-004A ~208

(N3-3) 1 FISHER ROSEMOUNT 41B5215X13R DISCRETE I/O CARD N3-3

MEASUREX 08495006 USPP 08495006

ALLEN BRADLEY 1336-B050-ECG-L3 USPP 1336B050ECGL3

GE FANUC IC697CGR935 USPP IC697CGR935

FANUC A16B-1010-0050 USPP A16B10100050

SIEMENS 6AV7-800-0BA00-1AC0 NSFP 6AV78000BA001AC0

RELIANCE ELECTRIC 30FR7731 USPP 30FR7731

SIEMENS 6EV3053-0CC USPP 6EV30530CC

Siemens 6ES5 470-4UC12 6ES54704UC12

Siemens 6ES5-947-3UA21 USPP 6ES59473UA21

SIEMENS 6ES5-440-8MA21 NSPP 6ES54408MA21

Siemens 6ES5 900 0AA11 6ES5-900-0AA11 807 1024 001 807-1024-001 BL2A SPCB460

Siemens S5 6ES5 951-7LB14 6ES59517LB14

SIEMENS C98043-A1200-P4

SIEMENS 6ES5 482-4UA11 DIGITAL I/O MODULE

Square D 8030 CBP-107

OMRON C200H-IP006 PERIPHERAL INTERFACE MODULE

WS-C3550-24-DC-SMI CISCO 3550 SWITCH 24-10/100 2 GBIC PORTSDC-PWRD: SMI

Siemens 6ES7315-1AF01-0AB0 CPU315 6ES73151AF010AB0

Siemens Simodrive C98043-A1204-L Control Board

Reliance WU4001179

Schneider Modicon ASP371001 Gould Program Pack AS-P371-100

Schneider Modicon AS-B546-000 USPP ASB546000

Schneider Modicon AS-W600-003 NSPP ASW600003

Schneider Modicon AS-BDEP-210 ASBDEP210 DEP 210 AC Input NIB

Schneider Modicon AS-B825-016 INPUT TRUE HIGH MODULE

MODICON ANALOG OUTPUT MODULE DAU 202 / AS -BDAU -202

SIEMENS ET 200X PLC INPUT OUTPUT MODULES 1BF11 1BF30 1DA00

Sharp JW50H JW-50CUH JW50CUH Control Module

Siemens Operator Interface Model 4700-DRMC3-11HN

SIEMENS SINUMERIK 6FC 3671-0FB-Z CONTROL RACK

TEKTRONIX COMMUNICATION DC POWER MODULE VSS75

SIEMENS 6SN1118-0NJ01-0AA1 SIMODRIVE 611 U HR 1-AXIS CONTROL LOOP BLOCK RESOLV

SIEMENS POWER SUPPLY SIMODRIVE 6SN1145-1BA01-0BA1

SIEMENS 6FC5-250-5PX10-3AH0 USPP 6FC52505PX103AH0

Advantech Remote Contact/Digital Input ADAM-4053

ALLEN-BRADLEY 1746-0AP12 SER. C REMOTE OUTPUT MODULE ""

ABB BAILEY SYMPHONY CONTROLS DIGITAL IMASI23 ANALOG INPUT SLAVE MODULE 88143

ADEPT TECH 10332-00500 USPP 1033200500

(000 nolot) Allen Bradley Motor 31HP (Kw) 37.1V 1600 RPM 8720SM-030Z4JAS2

INDRAMAT DDC01.2.N050C-RL01-01-FW USPP DDC012N050CRL010

TELEMECANIQUE ATV-66D64N4U USPP ATV66D64N4U

EEC AEG THYRO-3M-500-495-HF USPP THYRO3M500495HF

CUTLER HAMMER 92-00988-02 USPP 920098802

PPT VISION 661-0306 USPP 6610306

MODICON AS-584A-039 USPP AS584A039

INDRAMAT CLC-P01.1 USPP CLCP011

Siemens 6ES5 312-5CA12 -FS- 6ES53125CA12

Siemens 6ES5-526-3LG11 USPP 6ES55263LG11

SIEMENS 6ES5-374-0BA11 NSPP 6ES53740BA11

Siemens 6ES5 308-3UA12 6ES53083UA12 INTERFACE S5-115

Siemens 6ES5-524-3UA13 6ES5524-3UA13 N90

SIEMENS 6GK7443-5FX01-0XE

SIEMENS TP270 6AV6 545-0CC10-0AX0 Touch Panel Excellent Condition

Siemens 6ES5941-7UA12

LIKE CONDITION GUARANTEED TO WORK OR MONEY BACK

Yaskawa 87350-23001 PLC Module 8735023001 XLNT

Siemens 6ES7 223-1PH00-0XA0 6ES7223-1PH00-0XA0 FreeShip

Siemens OP37 6AV3637-1ML00-0CX0 Membrane Keypad ping Worldwide

Reliance 0-51377-35

Schneider Modicon AS-B805-000/ASB805000 Input

Schneider Modicon AS-9000-790 NSFP AS9000790

Schneider Modicon AS-P371-001 USPP ASP371001

Schneider Modicon AS-B350-001 OUTPUT MOD. B350001 ASB350001

Schneider Modicon AS-8535-000 HIGH-/LOW-DENSITY CONNECTOR NIB

MODICON TELEMECANIQUE MAGELIS OPERATOR INTERFACE TXB TF024510E PARTS/REPAIR

SIEMENS Simatic S7 6ES7 421-1BL01-0AA0 Digital Input Module

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

SIEMENS SIMATIC PANEL 6AV6 5A5-0BA15-2AX0 EXCELLENT SHAPE 24 V DC RS232 COM

Siemens 9300 9300DC-100-ZZZZA Power Meter Display ION Profibus Access

SIEMENS SINUMERIK MMC 102 6FC5210-0DA20-0AA1 NE

SIEMENS OPTION PROFIBUS DP2 6SN1114-0NB00-0A

SIEMENS SIMODRIVE 6SN1123-1AA00-0DA2

SIEMENS E Stand 1P 6FC5111-0CA73-0AA1 6FC50000CA730AA1

Advantech POS-7671

ALLEN-BRADLEY 2711E-K10C6 PANELVIEW 1000E OPERATOR INTERFACE

ABB 6400R M2000 robot with S4C+ control system

Acterna JDSU ANT-20 SE Advanced Network Tester ANT-20

6ES5252-3AA13

8520-VOP ALLEN BRADLEY MONITORS CRT REMANUFACTURED

SIEMENS 6SE7-018-0TA20 USPP 6SE70180TA20

BAILEY CONTROLS IMMFP-02 NSPP IMMFP02

ASEA BROWN BOVERI YT204001-AA USPP YT204001AA

MODICON AM-C986-004 USPP AMC986004

INDRAMAT MDD093C-N-030-N2L-110PB0 USPP MDD093CN030N2L11

ASEA BROWN BOVERI SMPS-7738-E USPP SMPS7738E

URYU SEISAKU UCD-150 USPP UCD150

Siemens 6ES5-451-2BA11 USPP 6ES54512BA11

SIEMENS 6ES5 700-1LA12 6ES57001LA12

SIEMENS S5 6ES5 375-1LA41 6ES53751LA41 Memory

Siemens S5 6ES5431-8MA11 Digital Input Module - 8DI24V

Siemens 6ES7 972-0BB12-0XA0 6ES7972-0BB12-0XA0 Profibus

Siemens S7-200 Cartridge Battery 6ES7 291-8BA20-0XA0

Siemens 3RX9501-0BA00

HONEYWELL Q7330A-1004 INTERFACE MODULE NIB

Waters Millipore Simbox System Interface Module

SIEMENS 6EC1-000-3A 6EC10003A

Siemens LOGO! 6ED1 052-1CC01-0BA6 NIB + LOGO USB Cable

Omron 3G2A6-PR015-E

Schneider Modicon AS-J890-001/ASJ890001 Beautiful condition

Schneider Modicon PROGRAMMABLE CONTROLLER AS-584L-231 230V

Schneider Modicon AS-H827-100 NSPP ASH827100

Schneider Modicon LOT OF 2 AS-8534-000 I/O DENSITY CONNECTOR

Schneider Modicon AS-C921

Schneider Modicon SCHEIDER POWER SUPPLY AS-P810-000 ASP810000 115/230V 2A

TELEMECANIQUE Modicon TSX-3708-001 TSX3708001

Schneider Telemecanique TM2DDI16DT MODICON PLC

Siemens X102 Operator Panel MS 100 H MS100H MS 1OO H MS1OOH MS-100-H

SIEMENS 6AV3688-3ED13-0AX0 PP17-II PUSH BUTTON PANEL

SIEMENS Sinumerik 6FC5203-0AF02-0AA0 PCU 50 Display

GE Communications Control Module IC693CMM311K

SIEMENS SIMODRIVE VPM 120 6SN1113-1AA00-1JA0

SIEMENS SIMODRIVE 6SN1146-1AB00-0BA1SINUMETIK 840D NCU-BOX 6FC52476FC5356 2ST

SIEMENS 07-09KIAAMANTIKEYLESSREMOTEFCC:SY55WY8412 VDOGOOD CONDITION

Allen-Bradley Analog Output Module 1771-OFE2/B

AB,ALLEN-BRADLEY BULLETIN GMC DIGITAL SERVO CONTROR 10KW 1394 ,AXIS 10KW,CK

AC Power AFC-11005A Single Phase In Single Phase Out Power Suppy

A06B-0759-B200#3000 FANUC AC SERVO SPINDLE REMANUFACTURED