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1771-DRS1現(xiàn)貨 in stock! 歡迎來電咨詢~！！

DCS系統(tǒng)在工業(yè)生產(chǎn)過程的廣泛應(yīng)用，使可靠性、穩(wěn)定性問題更加突出，也使人們對整個系統(tǒng)要求越來越高。人們希望DCS系統(tǒng)盡量少出故障，又希望DCS系統(tǒng)一旦出現(xiàn)故障，能盡快診斷出故障部位，并盡快修復(fù)，使系統(tǒng)重新工作。下面簡單介紹故障大體分類及故障診斷的一般方法。
　　一、DCS系統(tǒng)故障的分類
　　為了便于分析、診斷DCS系統(tǒng)故障發(fā)生的部位和產(chǎn)生原因，可以把故障大致分為如下幾類。
　　1、現(xiàn)場儀表設(shè)備故障
　　現(xiàn)場儀表設(shè)備包括與生產(chǎn)過程直接聯(lián)系的各種變送器、各種開關(guān)、執(zhí)行機(jī)構(gòu)、負(fù)載等。現(xiàn)場儀表設(shè)備發(fā)生故障，直接影響DCS系統(tǒng)的控制功能。在目前的DCS控制系統(tǒng)中，這類故障占絕大部分。這類故障一般是由于儀表設(shè)備本身的質(zhì)量和壽命所致。
　　2、系統(tǒng)故障
　　這是影響系統(tǒng)運(yùn)行的全局性故障。系統(tǒng)故障可分為固定性故障和偶然性故障。這類故障一般比較明顯且影響也是局部的，它們主要是由使用不當(dāng)或使用時(shí)間較長，模板內(nèi)元件老化所致。
　　3、硬件故障
　　這類故障主要指DCS系統(tǒng)中的模板(特別是I/O模板)損壞造成的故障。這類故障一般比較明顯且影響也是局部的，它們主要是由使用不當(dāng)或使用時(shí)間較長，模板內(nèi)元件老化所致。
　　4、軟件故障
　　這類故障是軟件本身所包含的錯誤所引起的，軟件故障又可分為系統(tǒng)軟件故障和應(yīng)用軟件故障。系統(tǒng)軟件是DCS系統(tǒng)帶來的，若設(shè)計(jì)考慮不周，在執(zhí)行中一旦條件滿足就會引發(fā)故障，造成停機(jī)或死機(jī)等現(xiàn)象。此類故障并不常見。應(yīng)用軟件是用戶自己編定的。在實(shí)際工程應(yīng)用中，由于應(yīng)用軟件工作復(fù)雜，工作量大，因此軟件錯誤幾乎難以避免，這就要求在DCS系統(tǒng)調(diào)試及試運(yùn)行中十分認(rèn)真，及時(shí)發(fā)現(xiàn)并解決。
　　5、操作、使用不當(dāng)造成故障
　　在實(shí)際運(yùn)行操作中，有時(shí)會出現(xiàn)DCS系統(tǒng)某功能不能使用或某控制不封不能正常工作，但實(shí)際上DCS系統(tǒng)并沒有毛病，而是操作人員操作不熟練或操作錯誤所引起的。這對于初次使用DCS系統(tǒng)的操作工較為常見。

Schneider Modicon TSX COMPACT DAP218 DISCRETE OUTPUT AS BDAP 218

SCHNEIDER ELECTRIC 140DAO84000 TSX QUANTUM OUTPUT MODULE AC OUT 24-230V

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SATA 6Gb USB 3.0 ATI 4290 Graphics Dolby HD audioHDMI

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ALLENBRADLEY1771-OGTTLOUTPUTMODULE

ALLEN BRADLEY SLC500 OUTPUT MODULE 1746-OB8/A S26D

ABB NINT-70

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MODICON AM-M909-000 USPP AMM909000

ALLEN BRADLEY 1394C-AM50 NSPP 1394CAM50

GENERAL ELECTRIC L90-D00-HCL-F8A-H6C-LXX-N6S-SXX-U6U-W7T NSFP L90D00HCLF8AH6CL

FURNAS ELECTRIC CO 3RW3465-0DC25 NSFP 3RW34650DC25

SIEMENS 6RA2413-2FS22 NSFP 6RA24132FS22

SEW EURODRIVE MDS60A0150-503-4-0T USPP MDS60A015050340T

YOKOGAWA DR1015B62 USPP DR1015B62

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WE SHIP SAME F/S VIC3-4FXS/DID CISCO 4 Port Voice Interface Card

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Schneider Modicon AS-B805-016 800 I/O MODULE

Schneider Modicon Modbus Adaptor Model AS-J375-010

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SchneiderElectricXBTF034510

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ABB Drive ACS800-U2-0170-5 150 HP 3 Phase

ADEPT TECHNOLOGY ROBOT CONTROLLER MODEL 310 SOLD AS IS

(7434) Reliance Battery Backup for Drive 803623-R NIB (7374)

INDRAMAT TDM1.2-100-300-W1/115 NSPP TDM12100300W1115

WESTINGHOUSE DS416-1200A-LSIG USPP DS4161200ALSIG

FANUC A06B-6059-H215 USPP A06B6059H215

ELDEC 5060044 USPP 5060044

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NSK ML-YA13096E02AT15 NSFP MLYA13096E02AT15

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Mitsubishi QJ71PB92D Q-Series PROFIBUS-DP Interface Module

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Reliance 0-57002

Schneider Modicon MINT AS-B883-111 ASB883111

Schneider Modicon AS-B243-110 INPUT MODULE ANALOG

Schneider Modicon AS-P930-204 USPP ASP930204

Schneider Modicon AS-B828

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Modicon Modbus Plus T-Connector 990NAD23000

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Advantech EVOC PCL-812PG REV:1.0 Card

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AD9644, ADC, SPI, EVALUATION BOARD, AD9644 155KITZ 2096106

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BAYSIDE PG115-150-041 USPP PG115150041

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MARPOSS 3405073000 NSFP 3405073000

EUROTHERM CONTROLS TC2001/02/150A/380V/00/4-20MA/NONE/SC/V2/PLU// NSFP TC2001021

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Omron NT20M-DT121-V1

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Schneider Modicon AS-J892-001

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ABB 3HAB 5956-1 DSQC 323 ROBOT MODULE MEMORY EXPANSION BOARD 8MB

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A06B-6104-H126#H543#B FANUC SERVO AMPLIFIER

809A02E ALLEN BRADLEY 809 A02E

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ASEA BROWN BOVERI 52614759 NSFP 52614759

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LAMBDA LK343A USPP LK343A

HACH 47605-00 USPP 4760500

ACUITY IMAGING AR4000 NSPP AR4000

PREFERRED INSTRUMENT PCC-III-0000 NSPP PCCIII0000

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SIEMENS 6ES5 441-4UA13 6ES54414UA13

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Schneider TELEMECANIQUE XBTOT2110 NIB

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ProCurve Switch 5412zl 96G J8700A

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HONEYWELL 627-1002R COMMUNICATION MODULE MINICOP

SIEMENS SIMODRIVE 6SN1145-1BA02-0CA1SINUMETIK 840D NCU-BOX 6FC52476FC5357

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Allen-Bradley PanelView 2711-TC1 Series E

555CXR Electric Conduit Bender w/ 28007 Shoe Group 1/2" a�“ 2" Rigid,120V

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A06B-0153-B084#0076 FANUC SERVO MOTORS REMANUFACTURED

7206 VXI VX4240 CARD

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ALLEN BRADLEY 1785-L60B NSFP 1785L60B

ALLEN BRADLEY 1404-M405A-ENT FNFP 1404M405AENT

GENERAL ELECTRIC DS3820MAUD NSPP DS3820MAUD

TOTAL CONTROL PRODUCTS CQPI31200C2P-A USPP CQPI31200C2PA

SYMAX 8030-CRM-570 USPP 8030CRM570

FISHER ROSEMOUNT 624095 USPP 624095

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SIEMENS 6ES5 370-0AA41 6ES53700AA41

SIEMENS 6ES5-931-8MD11 USPP 6ES59318MD11

Siemens 6ES5 731-1BD20 Cable Assembly

Siemens 6EP1333-2BA00 Power Supply 6EP1 333-2BA00

Siemens LOGO! DM16 230R 6ED1055-1FB10-0BA0 NIB

Rigol Digital Color Oscilloscope 100M dual CH DS1102CD

Texas Instruments 2460221-0001

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VWIC2-1MFT-G703 1-Port Multiflex Trunk G.703 E1 Voice/Wan Interface

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Modicon AS-T584-105

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Schneider Modicon AS-B550-101 OUTPUT MODULE

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Allen Bradley SLC-500 Input Module 16-Point 1746-IA16

ABB PCS Computer S14662708TABBB, Rev D, 6 Amps #34970

ZYNETIX GLOBE WIRELESS NETWORKS

...the most reliable digital Tach on the market

MODICON AS-506P-F16 USPP AS506PF16

ALLEN BRADLEY 1394C-SJT22-D NSPP 1394CSJT22D

GETTYS 110-135 NSFP 110135

GE FANUC IC3600ADAD1 USPP IC3600ADAD1

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ADLINK D7BCOMBONO NSFP D7BCOMBONO

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