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4.網絡結構
4.1 Ovation係統網絡採用兩層網絡結構,即ROOT級和FANOUT級。兩級均由Fast Ethernet組成,每層網絡設備採用冗餘配置。
4.2 Ovation係統採用的實時過程控制通訊網絡具有快速和大容量特點。採用全冗餘容錯技術的Ovation Control Network嚴格遵循IEEE標準。Ovation網絡與通訊介質無關,既可採用光纖, 也可採用UTP。Ovation網絡軟件符合ISO/OSI標準,可在任何一個標準物理網絡層通訊,具有所有網絡特性:冗餘、同步、確定和令牌傳輸。當與以太網、快速以太網、令牌環或其它拓撲結構相連時,它使用TCP/IP協議。因為Ovation係統在控制係統網絡術上的突破,用戶可在局域和廣域範圍內(LAN和WAN)構建信息係統,並合成多個網絡係統。
四.工藝控制要點
圖2、3為爐頂冷卻檢測係統全圖和接收罐水位調節面板圖。畫面顯示水泵、供水閥、排水閥、水位變送器、水箱等。控制面板包括水位實際值(PV)、設定值(SV)、供水閥開度值(MV)和閥門開度(XI)的柱狀圖和數字指示、水位設定值及增、減按鍵、供水閥開度及手動增、減按鍵,及自動(A)、手動(M)切換按鍵等。
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JOY 01760407-0032 GARDNER DENVER COMPRESSOR VALVE SEAT DISCH D549390
0.625 X 0.125IN X 300FT REINFORCED PVC FLEXIBLE TUBING D568883
FLOWSERVE C1C-375 COUPLING REMOVAL DEVICE D569214
THOMAS&BETTS A100-1/2EGC CLAMP NUT WITH REG. SPRING D565759
RUB S.92 S92B41 1/4 IN NPT BRASS BALL VALVE D566435
KIMBERLY CLARK A20 3688001 KLEENGUARD WHITE BOOT COVER D567019
FOSTER 25FSS STAINLESS 1/4 IN NPT QUICK DISCONNECT SOCKET D570495
ALFRED SUTER ROLLER-SMITH 704028 PRECISION BALANCE 0-100MG D567966
BABCOCK WILCOX BA9234400 SPRING BOLT BRONZE UNS NUT C95800 D568247
GARDNER DENVER 01760407-0031 JOY COMPRESSOR SUCTION VALVE SEAT D548972
SULLAIR 001077 THERMAL VALVE REPAIR KIT D535080
MORGAN 9651659 NATIONAL CARBON MOTOR BRUSH 1-1/4X3/4X2-3/4 IN D553601
GENERAL ELECTRIC GE 0360-0445-210 STYLE 360 PIPE REPAIR CLAMP 4IN D573991
FLUOROWARE IGP-04-000-1 INLINE GAUGE PROTECTOR 3/4IN D578854
MERCER RUBBER 150 3 X 1 IN EXPANSION JOINT D577997
RIKEN KEIKI RP-5 GAS SAMPLING PUMP D580698
CARLING EA2-B0-16-615-1DA-BC 2P 15A 125V-DC CIRCUIT BREAKERS D583489
HONEYWELL MP918B 1113 2 9937 PNEUMATIC DAMPER ACTUATOR D584530
VIEGA 81015 PROPRESS STAINLESS PIPE UNION 1IN D588182
HOWDEN 4008927-I PIN FOR SLIDE SHOE D591999
HACH 27425-45 TEST N TUBE REACTIVE PHOSPHATE 0-5MG/L REAGENT SET D585148
HACH 26053-45 TEST N TUBE NITRAVER X REAGENT SET D585150
HACH 26083-45 TEST N TUBE NITRIVER 3 REAGENT SET D585154
SPEARS 867V-530CSR 6IN X 3IN PVC SADDLE CLAMP D585411
VIEGA 80630 PROPRESS REDUCING TEE 3/4 X 3/4 X 1/2IN D588237
VIEGA 80410 PROPRESS STAINLESS 1IN 90DEG ELBOW D588232
TRELLEBORG PVYK560314712S BOX OF 15 TURCON VARISEAL SEAL D588735
NIBCO PC633 PRESSYSTEM 1IN COPPER UNION FITTING D589306
HOKE 8CF4316 GYROLOK 1/2IN TUBE X 1/4IN NPT TUBE CONNECTOR D589366
PULSAFEEDER 1HG-1GL PULSALUBE HYDRAULIC OIL 1 GAL. D586341
VIEGA 80840 PROPRESS STAINLESS REDUCING TEE 1 X 1 X 1/2IN D590409
VIEGA 80450 PROPRESS STAINLESS 45DEG ELBOW 3/4IN D590609
VIEGA 80640 PROPRESS STAINLESS REDUCING TEE 1 X 1 X 1/2IN D590606
VIEGA 80850 PROPRESS STAINLESS REDUCING TEE 1 X 1 X 3/4IN D590407
VIEGA 80830 PROPRESS STAINLESS REDUCING TEE 3/4IN D590405
WESTWOOD EQUIPMENT EMFP-04 AIR INTAKE FILTER D591077
MOBIL POLYREX EM MOTOR BEARING GREASE CARTRIDGE 14.1OZ D591130