GE IS3600A0AA2
上世紀九十年代走向實用化的現場總線控制系統，正以迅猛的勢頭快速發展，是目前世界上最新型的控制系統。現場總線控制系統是目前自動化技術中的一個熱點，正受到國內外自動化設備制造商與用戶越來越強烈的關注。現場總線控制系統的出現，將給自動化領域帶來又一次革命，其深度和廣度將超過歷史的任何一次，從而開創自動化的新紀元。 在有些行業，FCS是由PLC發展而來的；而在另一些行業，FCS又是由DCS發展而來的，所以FCS與PLC及DCS之間有著千絲萬縷的聯系，又存在著本質的差異。本文試就PLC、DCS、FCS三大控制系統的特點和差異作一分析，指出它們之間的淵源及發展方向。（儀器儀表世界網）
目前，在連續型流程生產自動控制(PA)或習慣稱之謂工業過程控制中，有三大控制系統，即PLC、DCS和FCS。它們各自的基本特點如下：
1、PLC
(1)從開關量控制發展到順序控制、運送處理，是從下往上的。
(2)連續PID控制等多功能，PID在中斷站中。
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NEW MOSIER 3841-02 PISTON PNEUMATIC CYLINDER REPLACEMENT PART D358172
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NEW COZZINI EP-10402.0 EP-104020901 EMULSIFIER REDUCTION PLATE 2.0MM D211301
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NEW WAUKESHA AD0-098-001 PRONG SLEEVE 37MM OD 29MM ID 12MM THICK D435767
NEW DRESSER 852-474-023 ROOTS 9-3/4IN OD LOBE DRIVE SHAFT PUMP IMPELLER D482057
NEW TACO 950-1166BRP BRonZE WEAR RING D502137
BALDOR COLUMBUS MCKINNON 117045-27 A4 LIFTTECH 1-1/2HP HOIST GEAR MOTOR HD516381
NEW MILTON ROY 2980051062 ConTOUR PLATE ASSEMBLY ALUMINUM D480543
HYDAC LPFW/HC240GI25B?M1.2/12B3 HYDRAULIC FILTER HOUSING 1-1/4 IN PART B493528
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BonNEY FORGE SA A105 3000CWP UNIOn PIPE IRON 2 IN NPT FITTING B251192
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NEW LEE INDUSTRIES FT-502-5768 SEAL TEFLON BALL VALVE REPLACEMENT PART D374948
NEW EURODRIVE 1505386 GEAR BOX FRICTION RING REPLACEMENT PART D374644
NEW TRI CLOVER 19-571-21 VALVE PLUG STEEL REPLACEMENT PART D222928
SKF HE3140 BEARING SLEEVE ADAPTER D497371
NEW PSC 58516 3/4IN BORE SPUR GEAR REPLACEMENT PART D377845
NEW GOULDS 58101-393 RETAINING RING D422432
NEW ALFA LAVAL 390 SEAL RING 48X35X19MM BUTTERFLY VALVE REPLACEMENT PART D260407
SCHRADER BELLOWS 094534000 PIPE ConNECTOR KIT 3/8IN ASSEMBLY REPLACEMENT B266053
NEW KHS-BARTELT 685-92-71-050/3?A VALVE MOUNTING KIT REPLACEMENT PART D426689
NEW NORGREN MB002A QUIETAIRE 1/4 IN NPT PNEUMATIC MUFFLER SILENCER D463202
NEW WALLACE & TIERNAN P 43111 GAS FLOW ConTROL APPARATUS SPRING D472666
NEW NASH PF-0927-15 UNIOn ORIFICE 2IN FOR NASH CL-6002 REPLACEMENT PART B411780
NEW TRI CLOVER B53-6000-SK ACTUATOR REPAIR KIT D508099
NEW SKF B-9784-82 SEAL KIT REPLACEMENT PART D451974
NEW BINER ELLISON D-44-2396 NO.63 CAPPER CHUCK HOLDER ALUMINUM 1-1/2IN D260591
NEW PAAL B0030.516 LOCKING COLLAR REPLACEMENT PART D375083
NEW TRI CLOVER 12-146-1-316L STAINLESS SHUT-OFF VALVE BonNET 1 IN D449945
NEW RULAND SP39SS STAINLESS COLLAR 2-7/16IN ID X 3-1/2IN OD X 1IN THICK D421810
NEW ORIGA 27900502 PNEUMATIC CYLINDER REPAIR KIT REPLACEMENT PART D387851
NEW BALSTON 22464 FILTER HOUSING CLOSURE O-RING REPLACEMENT PART D381156
NEW PARKER 74000-7145 COIL 120-VAC QC130 SOLENOID VALVE D497495
NEW SKF TSN 520 GA LIP DOUBLE SEAL REPLACEMENT PART D298426
NEW CHESTERTON 010357 3.000 X 4.000 X 0.500 PUMP PACKING RING GRAPHITE D476825
NEW CHESTERTON 010357 3.000 X 4.000 X 0.500 PUMP PACKING RING GRAPHITE D476825
NEW MOSIER 3841-02 PISTON PNEUMATIC CYLINDER REPLACEMENT PART D358172
NEW 506-8310-2 SHAFT GEAR REPLACEMENT PART D446350
WESTINGHOUSE 6046777H46 168H541 4 IN SLEEVE BEARING REPLACEMENT PART B456247
KINGSBURY 366039-001-D1 SET 6 IN THRUST PAD SHOE BRAKE REPLACEMENT PART B493615
BOSCH 50/2X660 CARDAN DRIVE SHAFT REPLACEMENT PART B364020
NEW GOULDS 58102 196 3405 SNAP RING REPLACEMENT PART D472672
NEW MORSE 604308 700 TL 925 PB BUSHING CLUTCH D501535
NEW NELES JAMESBURY V-60 125 PSI VALVE VANE ACTUATOR REPLACEMENT PART D450088
NEW DODGE RELIANCE 278475 140TC GEAR REDUCER FLANGE MOTOR frame ADAPTER D423948
NEW SPIRAX SARCO 57143 VALVE STEM GUIDE & NUT REPAIR KIT D301132
NEW VK 110 12 END CAP 110MM OD 12MM THICK SHAFT REPLACEMENT PART D415044
NEW KRonES C-K13-00-003-5 110 PTFE DIAPHRAGM ACTUATOR REPLACEMENT PART B491463
NEW COZZINI EP-10402.0 EP-104020901 EMULSIFIER REDUCTION PLATE 2.0MM D211301
JOHN CRANE 611QGCSBR337-22 MECHANICAL 1-3/8IN PUMP SEAL REPLACEMENT PART B295158
NEW WAUKESHA AD0-098-001 PRONG SLEEVE 37MM OD 29MM ID 12MM THICK D435767
NEW DRESSER 852-474-023 ROOTS 9-3/4IN OD LOBE DRIVE SHAFT PUMP IMPELLER D482057
NEW TACO 950-1166BRP BRonZE WEAR RING D502137
BALDOR COLUMBUS MCKINNON 117045-27 A4 LIFTTECH 1-1/2HP HOIST GEAR MOTOR HD516381
NEW MILTON ROY 2980051062 ConTOUR PLATE ASSEMBLY ALUMINUM D480543
HYDAC LPFW/HC240GI25B?M1.2/12B3 HYDRAULIC FILTER HOUSING 1-1/4 IN PART B493528
NEW KOP-FLEX 0810012 516029 SEAL KIT 7 IN OD REPLACEMENT PART D453231
NEW 100045 SPLINED BORE VAIRABLE SPEED DISC PULLEYS D339850
NEW REEVES D132660 15/16IN BORE VARIABLE SPEED PULLEY DISC KIT D397828
NEW MERIT ABRASIVES 61059 POWER-LOCK ABRASIVE DISC 3IN 60 GRIT D449066
NEW CREPACO 06H-P-342456 7/8IN THREAD STEEL DOUBLE ENDED STUD SHAFT D346999
NEW ASCO 182882 VALVE SPARE PART KIT REPLACEMENT PART D354403
BonNEY FORGE SA A105 3000CWP UNIOn PIPE IRON 2 IN NPT FITTING B251192
NEW LOVEJOY 685144-67587 LS150 RING onLY IN SHEAR D353919
NELES JAMESBURY ST50 EF8345G1 150PSI MAX ACTUATOR REPLACEMENT PART B444741
NEW DODGE RELIANCE 79156 06N PX 30MM BORE 121MM OD GEAR D424400
DODGE RELIANCE 41511265TD SIZE 050 REEVES ConSTANT DISC REPAIR KIT B482478
NEW DODGE RELIANCE 07901938ET MOUNTING ConVERSION KIT GEAR REDUCER D367223
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