A06B-6096-H105
A06B-6096-H105迄今為止,傳統的OPC技術已有3種不同的OPC服務器 – 數據訪問服務器、報警與事件服務器和歷史數據訪問服務器。如果用戶需要獲取一個溫度傳感器的當前值,一個溫度超過限定值的事件和一個溫度的歷史平均值,那么他發送3個請求,訪問3個服務器。
用戶訪問過程數據、事件和歷史數據用不同的方法要花費很多的時間。所以,統一這3種對象模型可以使這樣的事情變得非常簡單,不僅對OPC產品的供應商有利,也對系統集成商和用戶有利。
支持復雜數據結構
OPC的一個主要應用是對串行通信或者現場總線聯網設備的操作和監視。為了配置設備,OPC客戶機需要寫入數據類型,通過OPC服務器到達設備,包括數據結構元件的意義。
OPC基金會已經創建了描述復雜數據結構的方法,即復雜數據規范。然而,大多數今天市場上的傳統OPC產品除了很少的例外,不能使用復雜數據規范。
保證通信不丟失數據
早定義的數據訪問,可以讓客戶應用程序周期獲得過程數據的當前狀態。如果在OPC客戶機和遠程OPC服務器之間的物理通信連接發生了問題,數據通信會受到損壞。當通信損壞時,傳輸到OPC客戶機數據會發生改變,甚至丟失。
這種數據丟失在有些數據訪問應用中不是關鍵的,諸如趨勢記錄、過程監視或者過程顯示。但在有些場合的應用中是非常關鍵的。比如,OPC技術已經成為這些區域的基礎,諸如化工或者石化工業,這些地方要求無縫地記錄數據。
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SQUARE D QOB260 60 AMP 2 POLE BREAKER BOLT-IN
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ALLEN BRADLEY SLC500 OUTPUT MODULE 1746-OB32 SERIES D
ALLEN BRADLEY SLC500 PROCESSOR UNIT 1747-L532 SERIES D
ALLEN BRADLEY SLC500 PROCESSOR UNIT 1747-L542 SERIES B
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NEW SQUARE D 9037 HW 39 FLOAT SWITCH 9037 HW39 SERIES A
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ORIENTAL MOTOR VEXTA CSD2120 -T 2 PHASE STEPPING DRIVER
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METTLER TOLEDO LOAD CELL CONVERSION KIT 0736 TA600215
GE 800 AMP BREAKER DISCONNECT SWITCH SKHA36AT0800
ORTHODYNE ELECTRONICS PCB ASSY 171507 CIRCUIT BOARD
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ORTHODYNE ELECTRONICS PCB ASSY 171562 CIRCUIT BOARD
ORTHODYNE ELECTRONICS PCB ASSY 160717 CIRCUIT BOARD
ORTHODYNE ELECTRONICS PCB ASSY 160522 C CIRCUIT BOARD
ORTHODYNE ELECTRONICS PCB ASSY 160742 CIRCUIT BOARD
THEMIS TSVME190-1 CIRCUIT BOARD
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NEW NIPPON CHEMI-CON 601D 560UF 50V DC CAPACITOR (10)
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METTLER TOLEDO LOAD CELL CONVERSION KIT 0736 TA600215
GE 800 AMP BREAKER DISCONNECT SWITCH SKHA36AT0800
ORTHODYNE ELECTRONICS PCB ASSY 171507 CIRCUIT BOARD
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ORTHODYNE ELECTRONICS PCB ASSY 171562 CIRCUIT BOARD
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ORTHODYNE ELECTRONICS PCB ASSY 160742 CIRCUIT BOARD
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ORTHODYNE ELECTRONICS BD ASSY 160752 CIRCUIT BOARD
TELEMECANIQUE LC1DT20 BL CONTACTOR 24 VDC 25A 7.5HP
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