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DCS的控制决策是由过程控制站完成的,所以控制程序是由过程控制站执行的。 5、 过程控制站的组成如何 DCS的过程控制站是一个完整的计算机系统,主要由电源、CPU、网络接口和I/O组成 6、 I/O是什么? 控制系统需要建立信号的输入和输出通道,这就是I/O。DCS中的I/O一般是模块化的,一个I/O模块上有一个或多个I/O通道,用来连接传感器和执行器(调节阀)。 7、 什么是I/O单元? 通常,一个过程控制站是有几个机架组成,每个机架可以摆放一定数量的模块。CPU所在的机架被称为CPU单元,同一个过程站中只能有一个CPU单元,其他只用来摆放I/O模块的机架就是I/O单元。 8、I/O单元和CPU单元是如何连接的? I/O单元与CPU是通过现场总线连接的。 9、 什么是现场总线? 现场总线是应用于过程控制现场的一种数字网络,它不仅包含有过程控制信息交换,而且还包含设备管理信息的交流。通过现场总线,各种智能设备(智能变送器、调节法、分析仪和分布式I/O单元)可以方便地进行数据交换,过程控制策略可以完全在现场设备层次上实现。目前,使用较多的现场总线主要是FUNDATION fieldbus基金会现场总线(FF总线)和Profibus现场总线。应用现场总线技术可以将各种分布在控制现场的相关智能设备和I/O单元方便的连接在一起,构成控制系统,这种结构已经成为DCS发展的趋势。 10、 常用的系统中采用什么现场总线? 目前常用的系统主要是SIEMENS 的S7和ABB的Freelance2000,其中使用的现场总线是PROFIBUS。 11、表述网络传输速度的单位是什么? 表述网络传输速度一般以波特率(Bps)为单位,其含义是每秒钟传输的二进制数的位数。不同的网络一般波特率不同,相同的网络采用不同的网络电缆也可以达到不同的特率。
ACS800 SOFTWARE ACS800 FCB TEMPL APPL ABB ATXR7520
ACS800-104-0260-3 ABB 68684137
ACS800-U1-0020-7 -REPAIR US001 ABB YACS800U100207
ADAPTOR ABB 3HNA016797-001
ANALOG INPUT AI86-16 -40C ABB REP57782676
AXIS SELECTOR IRBP B/D SET ABB 3HAC030793-001
Actuator FG Wilson 921-358
Actuator Perkins 26740219
Adapter Caterpillar 1P1835
Adapter Caterpillar 3N4848
Adapter Caterpillar 4T7455
Adapter Caterpillar 8E3464
Adaptertip Caterpillar 3091116
Adaptor Caterpillar 3191602
Adaptor FG Wilson 520-170
Adaptor FG Wilson 520-495
Adaptor FG Wilson 929-360
Alternator FG Wilson 10000-12087
Analog. simulation input board IVAPOT ABB EXC940259001
Anchor Caterpillar 2188119
Arm-Center Caterpillar 2077321
Armas Caterpillar 1555782
Armresta Caterpillar 9C5850
BACK PLATE VS-MEK ABB 61023780
BALANCING CYLINDER ABB 3HAC10292-1
BEARING-BOLT ABB 3R 043046
BREAKER FAZ-C4/1 ABB 3BHB000623P1005
BRUSH 162540 ABB 43911538-246
BUS REPEATER MASTER DSBC 170 ABB TES57310256-DB
BUZZER RMB-2420 ABB 5FSE705690-4
Backplate Perkins 3714A041
Bar Caterpillar 6I8070
Bar Caterpillar 8C7175
Bearing Caterpillar 1397342
Bearing Caterpillar 1772500
Bearing Caterpillar 2H9192
Bearing Caterpillar 2S4182
Bearing Caterpillar 3P2582
Bearing Caterpillar 3W3334
Bearing Caterpillar 8D3309
Bearing Caterpillar 9S6958
Bearing-Cla Caterpillar 2977139
Bearing-Cla Caterpillar 3777433
Bearing-Roll Caterpillar 1214459
Bearing-Slee Caterpillar 1633748
Bearingkit Caterpillar 8T9330
Bearingset FG Wilson 923-087
Bearingslve Caterpillar 7N2864
Bearingthrust FG Wilson 952-376
Belt Caterpillar 1F3603
Blastmedia Caterpillar 1633948
Block Caterpillar 1308692
Block Caterpillar 2389572
Block Caterpillar 2628364
Block Caterpillar 2H2947
Block Caterpillar 3043551
Blocka Caterpillar 5T9770
Blockgp-Cyl Caterpillar 2096725
Blowerassy Caterpillar 6P1295
Blowerfang Caterpillar 4N3465
Bodya Caterpillar 7C0887
Bolt Caterpillar 2871845
Bolt Caterpillar 2L1091
Bolt Caterpillar 2L6324
Bolt Caterpillar 3239312
Bolt Caterpillar 3686033
Bolt Caterpillar 5D9514
Bolt Caterpillar 7X0358
Bolt Caterpillar 8L5202
Bolt Caterpillar 965968
Bolt Caterpillar 9X8872
Bolt Caterpillar 9X8886
Bolt FG Wilson 901-255
Bolt-Socket Caterpillar 1555968
Bootkit Caterpillar 1337549
Boss Caterpillar 7Y8528
Bossas Caterpillar 2124758
Bracket Caterpillar 1694357
Bracket Caterpillar 1987464
Bracket Caterpillar 2652817
Bracket Caterpillar 3488145
Bracket Caterpillar 4I1163
Bracket FG Wilson 952-289
Bracket Perkins 38311124
Bracket Perkins 4141A013
Bracketa Caterpillar 1171043
Bracketas Caterpillar 2494599
Bracketas Caterpillar 2594914
Bracketas Caterpillar 2660821
Bracketas. Caterpillar 2534534
Bracketassy. FG Wilson 10000-11701
Bracketassy. Perkins 4141A216
Breaker FG Wilson 10000-07004
Breakerbox FG Wilson MDC7285/WH
Brg-Slv-Cla Caterpillar 3071528
Brgkit-Tx Caterpillar 1278373
Brgkitfd Caterpillar 1381410
Brush Perkins 185416480
Bulkheadas Caterpillar 3187972
Bush FG Wilson 981-807
Bushg,track Caterpillar 939898
Bushing Caterpillar 1F2436
Bushing Caterpillar 5P8667
CABLE AP1.XS15-GS1.XP2 ABB 3HNE 01270-1
CABLE FFB.J22-DSQC500.J22 ABB 3HNE 05171-1
CABLE JIB CIRC.BREAKER F1 ABB 3HAC14625-1
CABLE MOTOR INT. FLEXIBLE IRC5 5.3M ABB 3HEA800523-003
CABLE STOPPER ABB 4C4197
CAPACITOR B25353-J8338-K4 ABB 9834729
CAPACITOR CKPRX4K5J0605 ABB 57918730
CARD SJPC 2C1 ABB 57580976
CASE NOTE, ACS 1000 ABB 3BHT490374R0001
CGO-9 with Reaction Tube ABB 856545
CHAIN LINK CHAIN-1 ABB 3HAC5246-63
CHRG.RESIST.BRIDG SADUT, GRI 20/165 ABB 61275631
CIRCUIT BOARD SGEB 6B1 ABB REP57135794
COMMUNICATION GATEWAY ABB COM610HGM00SA
COMMUNICATION GATEWAY ABB COM610SLMAAS0
COMMUNICATION GATEWAY ABB COM615LSMAAS0
CONT. UNIT / SAFUX TO SAF SAFUT REBUILD KIT SAFUT REBUILD KIT II ABB 61274464
CONTACTOR A26-30-10-80 ABB 59015788
CONTACTOR AF400-30-22 ABB 1SFL577001R7022
CONTACTOR B6-40-00110V 40-60HZ ABB GJL1211201R0004
CONTROL CABLE 66/7600 7M L=7M ABB 3HAC026787-001
CONTROL CABLE WASH 15M 15M ABB 3HAC028259-001
CONTROL PANEL MANUAL JOG ABB 3HAC028129-003
CONTROLCABLE IRBT M93 5 M ABB 3HXD1135-50
COVER S1 WITH PAINT ABB 3HNM 04449-1
CPU-186 SADC 11 CPUF+DR E4 ABB 57865156
CURREN.MEAS.BOARD SADC 102 CUR ABB EXC57920238
CURRENT TRANSD LC 1000-S/SP6 ABB 10003652
Cable FG Wilson 998-129
Cableas Caterpillar 1326289
Cableas Caterpillar 1355049
Cam Caterpillar 2260340
Cam Caterpillar 2326586
Camshaft Perkins CV8465
Canopy FG Wilson MCA1228/CY
Cap-Filr-Cla Caterpillar 3611719
Capas Caterpillar 3532060
Capscrew Caterpillar 9F8122
Catwalkas Caterpillar 2725431
Chaina Caterpillar 9V9443
Chargergp Caterpillar 1966951
Circuit Board HMI ABB 746953
Clamp Caterpillar 5C4113
Clamp Caterpillar 5C8511
Clamp Caterpillar 6I0884
Clamp Caterpillar 951394
Clamp-Tbolt Caterpillar 2545633
Clampa Caterpillar 8N6203
Cleanergp-A Caterpillar 2528751
Clip Caterpillar 2027001
Clip Caterpillar 2698251
Clip Caterpillar 7D1089
Clip Caterpillar 8K5440
Cm-Cable/ele Caterpillar 1232376
Cmseal Caterpillar 3756415
Cmseal Caterpillar 3E6602
Column Capillary 0.53mm X 30m ABB 847P101-043115000304
Column Packed 1/16\" X 6\" ABB 847D001-0610616000000001
Column Packed 1/8\" X 12\" ABB 847D001-1210710000033082
Column Packed 1/8\" X 12\' ABB 847D001-1220710000046081
Column Packed 1/8\" X 12\' ABB 847D001-1220713310008081
Column Packed 1/8\" X 6\' ABB 847D001-0620710000037032
Column Packed 1/8\" X 8\' ABB 847D001-0820710000065082
Column Packed 1/8\" X 8\' ABB 847D001-0820712120016051
Communication board DSCS 116 ABB REP57520001-BZ
Compressor Perkins 1696864C92
Cone Caterpillar 1388634
Connector Caterpillar 1P0268
Connector Caterpillar 3028496
Connectoras Caterpillar 2005670
Contgp-Mtg Caterpillar 3639928
Control Perkins 782/74
Controlg Caterpillar 1106497
Controlgp Caterpillar 1496470
Conv/muffler Caterpillar 2579023
Converter FG Wilson 652-113
Convgp Caterpillar 7X1350
Cooleras Caterpillar 4P5929
Cooleras-Oi Caterpillar 3595105
Corea Caterpillar 1144415
Coreas-Oil Caterpillar 1838115
Coreas. Caterpillar 1996683
Cotter Perkins CH10019
Counterweigh Caterpillar 1515943
Coupler Caterpillar 9W0076
Coupling Caterpillar 5K2748
Coupling Caterpillar 5P0488
Coupling Caterpillar 6V5858
Coupling Caterpillar 6V9593
Coupling Caterpillar 7N5650
Coupling Perkins 2581369
Couplingas- Caterpillar 3289126
Cover Caterpillar 1164151
Cover Caterpillar 1F4418
Cover Caterpillar 1W6304
Cover Caterpillar 2577007
Cover Caterpillar 2954573
Cover Caterpillar 2H4982
Cover Caterpillar 7C2891
Cover Caterpillar 8J6229
Cover-Rops Caterpillar 1809170
Coveras- Caterpillar 1345623
Covergpcyl Caterpillar 3188038