描述
3類FCS的典型
1）連續(xù)的工藝過程自動控制如石油化工，其中“本安防爆”技術是絕對重要的，典型產(chǎn)品是FF、World FIP、Profibus—PA；
2）分立的工藝動作自動控制如汽車制造機器人、汽車，典型產(chǎn)品是Profibus—DP、CANbus；
3）多點控制如樓宇自動化，典型產(chǎn)品是LON Work、Profibus—FMS。
從上述基本要點的描述中，我們是否注意到一點，用于過程控制的三大系統(tǒng)，沒有一個是針對電站而開發(fā)的，或者說，在他們開發(fā)的初期，都并非以電站做系統(tǒng)的首選控制對象。而在這些系統(tǒng)的使用說明中也絕不把電站做為首選適用范圍，有的在適用范圍中根本就不提電站。現(xiàn)在奇怪的是，這三大控制系統(tǒng)，尤其是DCS、PLC，都在電站得到了廣泛應用，而且效果也非常好。
3．三大控制系統(tǒng)之間的差異
我們已經(jīng)知道，F(xiàn)CS是由DCS與PLC發(fā)展而來，F(xiàn)CS不僅具備DCS與PLC的特點，而且跨出了革命性的一步。而目前，新型的DCS與新型的PLC，都有向?qū)Ψ?攏的趨勢。新型的DCS已有很強的順序控制功能；而新型的PLC，在處理閉環(huán)控制方面也不差，并且兩者都能組成大型網(wǎng)絡，DCS與PLC的適用范圍，已有很大的交*。下一節(jié)就僅以DCS與FCS進行比較。在前面的章節(jié)中，實際上已涉及到DCS與FCS的差異，下面將就體系結構、投資、設計、使用等方面進行敘述。
產(chǎn)品承諾：
保?證?全新原裝進口,
保?證?安全準時發(fā)貨，
保?證售后服務質(zhì)量，
優(yōu)勢價格，大量現(xiàn)貨。
主營DCS系統(tǒng)配件
機器人系統(tǒng)配件
大型伺服系統(tǒng)配件
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IAI Robo Cylinder Controller, RCS-C-SA6I-30-0?, WARRANTY
Okuma LC-20 Servo Motor W/D6 Encoder C-400T-25 Warrant
FANUC PC BOARD A20B-2900-0480 A20B29000480
Superior Elec. Slo-Syn Power Supply MPS-3000A MPS3000A
Baldor Motor 3HP 230/460V 7.4/3.7A 3460RPM 60Hz M3610T
Telemecanique Contactor, # LC1F1504, WARRANTY
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Zeiss Coordinate Measuring Machine Board, # 608483-0303
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Indramat Servo Drive Motor, # MKD025B-144-KPO?-KN, NICE
CHATILLON Dynamometer CSD200 w/ Plastic Case WARRANTY
Kearney Trecker Feedback Subsystem 1-20662-01 REV 13
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Allen Bradley Comm Module Board 900052-90 03E WARRANTY
Mitsubishi Meldas PC Board # TCUA-01-DWC BY171A318G54
ALLEN BRADLEY 900036 PC Circuit Board, WARRANTY
Okuma OSP3000/2000 CMOS Memory Board II, E4809-045-191
Fanuc PC Board, A02B-0004-0170, DC Servo Drive Board
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Square D Combination Starter 8538-SCA24 8538SCA24
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Magnetek 1.5 HP DC Motor w/ Reliance Master XL Speed Re
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24-3/4″ Cast Iron Face Plate, D1-8″, 5-3/8″ Hole, NEW
Allen Bradley 1336 Plus Drive, 1336S-BRF50-AA-?EN-HAP-L6
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8″ x 14″ x 4-5/8″ Walker Electro-Magneti?c Univ. Chuck
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Sola 34 KVA 3 PH Drive Isolation Transformer 460-460/26
XEROX ENGINEER PRINTER 2515 WITH MANUAL USED
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