ABB IEMMU11

ABB IEMMU11
ABB IEMMU11
ABB IEMMU11
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三、DCS系统故障防范及维护措施
通过以上诸多故障实例，我们不难看出，降低DCS系统的故障几率，做好分散控制系统从选型设计到运行、维护的工作。
3.1 DCS的选型设计调试
3.1.1无论新建机组还是升级改造的DCS，系统和控制器的配置要重点考虑可靠性和负荷率(包括冗余度)指标。通讯总线负荷率设计控制在合理的范围内，控制器的负荷率要尽可能均衡，要避免因涉及规模大而资金不足所带来的、影响系统运行的“高负荷”问题的发生。
3.1.2系统控制逻辑的分配，不宜过分集中在某个控制器上，主要控制器应采用冗余配置。
3.1.3电源设计合理可靠。一是要强调电源设计的负荷率；二是要强调电源的冗余配置方式，同时要保证两路电源的独立性。
3.1.4要注重DCS系统接口的可靠性措施。强调重要接口的冗余度和接口方式的选择，主要是注意可靠性和实时性。
3.1.5对于DCS系统接地按厂家要求执行，避免接地问题造成系统大面积故障。应注重考虑系统的抗干扰措施、自诊断和自恢复能力，I/O通道应强调隔离措施。电缆的质量与屏蔽问题也高度重视，重要信号及控制应使用计算机屏蔽电缆。
GE Pressure Sensor 24' Calbe PTX 5012-TC-A3-CB-H0-PE, X5012-TC-A3-CB-H0-PE 1180

Escort Memory Systems HS850-4, HS8504, ShipSameDay WITH2-3 days 1602AC

Okazaki Resiopak Element Pt 100 Ohm, Class 1mA, GS0864101, 3/8" Npt, 1180A

MKS Mass Flow Controller 1480A02312CR14M14, H2Se, 100 SCCM, ShipSameDay1619A26

Bourns Trimmer 250K, 3262W-1-254,  SHIPSAMEDAY M22

Nordon Gun Heater Vac Heater 240, 110593, E700W, E-700W, ShipsamedaY 142Z

SMC solenoid valve 24V, SY3140-5L0Z, SY3140-5LOZ

Siemens Trip Unit 3p 800a, LMD63T800, 3200-8000, Shipsameday 1224B

10x Flexible Hose Vacuum bellow medium wall NW16 x 24", SHIPSAMEDAY RACK H H93

SWAGELOK Diaphragm Valve 1/4" VCR x 1/4" FVCR, 6LV-DAFR4VR4P-C

Eaton Powerware Bypass Control Circuit Board, 101073070-001, Rev-E00 128A3

Millipore MFC Intelliflow, FSDAK1001800 ,N2, 500 SCCM

Millipore MFC Intelliflow, FSFAK100PK00, N2, 15000 SCCM

Millipore MFC Intelliflow FSGAK100C200, H2, 30000 SCCM

Telemecanique Contactor, 3P, 700A, 600V, 200-208V COIL, LC1F500, LX1FK200,

Direct Logic Koyo D4-440 CPU, D4-32TD1, D4-32ND3-1, 2x F4-04AD 2x D4-FILL

DirectLogic405 D4-440CPU & D4-06B-1 & 2x D4-32TD1 & D4-32ND3-1 & 2 D4-FILL

Varian variable leak valve CONFLAT 2.75", 951-5106, SHIPSAMEDAY1325B5

Samtec CONN EDGE CARD DUAL .8MM 20POS, HSEC8-110-01-SM-DV-A P31

PARKER BULKHEAD 1", 16-16 WBZ-SS

Watlow Digital Temperature Controller PM8C1CK-2CCKAAA, PM8C1CK-2CCKAAA009612

PRESSTEK EEB04771 Rev E, Mechanism Control Dimension ECCC4 94VO 4200 1619A

Board Mount Temperature Sensors THERMAL MGMT, ADT7460ARQZ, Q49

Shrouded Header 26pos, 2526-6002UB, 80-6105-6523-8, 139K

BALL SCREWS & ACTUATORS B17-36D-26X, B17-36D-26X, B1736D26X

CKD Ball Valve Brass 3/4" FNPT, 24V, MXBC2-20-0-3, MXBC22003

Swagelok High Pressure Bellows Sealed Valve 1/4” VCR, SS-HBVVCR4-P-C

Texas Intruments LM4120AIM5-3.3/NOPB, LM4120AIM5-3.3 Lot Of 925, Shipsameday D4

Omega I/O USB Data Acquisition Module, OMB-DAQ-2416, 0MB-DAQ-2416, rack B B73

Bourns 3362UFL7104R, SHIPSAMEDAYT4

NOR-CAL TRAP FLEX COAXIAL WATER COOLED 8" X NW100, FTWS-8-4002-ISO-QD,

MKS Baraton Capacitance Manometer 100 TORR, 624B-25050, Shipdameday1212E

MKS HPS Products GAUGE-ION, NW40, SERIES 903 AP, 109030211, Shipdameday1212R

Swagelok EP Body Bulk Gas Diaphragm Sealed Valve 1/2" VCR, 6L-ELD8-CCXX 1327A6

HORIBA MASS Mass Flow Meter CONTROLLER, LF-F40M-A-EVD-183, SHIPSAMEDAY1542C5

AirGas Gas Regulator, Y12-N245B350

Branson Converter 135044, Shipsameday, With 2-3 Days Shipping 1638A5

Watlow Controllers 2X PM3R1CA-1AAAAAA & 2X RM1A23D25 & 485USBTB-2W

OMRON Counter Position  GRT1-CP1-L, SHIPSAMEDAY 1227A6

Reliance Electric Network Cable, 86429-84R, J2-3019, 45C31, SHIPSAMEDAY1208D

NEST ELECTRONICS PCB CARD  MPS16DAC2, SHIPSAMEDAY 1619T

NEST ELECTRONICS ADK PCB CARD DR0000BL. 1-1A ADK.V0 ND205, SHIPSAMEDAY 1619S