可編程自動化控制器（PAC）與PLC的區別和

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可編程自動化控制器（PAC）作為新一代的工業控制器，代表著可編程自動化控制發展的未來。在可以預見的幾年內，對標準性、開放性、可互操作性、可移植性的要求將是用戶至為關心的自動化產品的重要特征，作為融匯了PC和PLC優點的PAC系統必將逐步取代PLC系統成為控制系統的產品，在工業自動化控制中的應用將會越來越廣泛。

PLC的性能倚賴于的硬件，PLC的應用程序是依靠的硬件芯片來實現的，對于PLC的功能的改進，如增加運動控制、過程控制或通訊功能，都需要使用不同的硬件。即使對于同一PLC廠家，這種的硬件很難移植到不同的PLC中。而且傳統的PLC廠家的硬件結構體系都是專有的設計，甚至于處理器芯片都是的，這樣就導致了隨著PLC功能需求的不斷提高，PLC的硬件體系變得越來越復雜。而且，由于硬件的非通用性會導致系統的功能前景和開放性受到很大的限制。另外，PLC 的操作系統通常都是各PLC廠家的操作系統，與目前流行的實時操作系統不兼容。由于是的操作系統，其實時可靠性與功能都無法與通用的實時操作系統相比，這就導致了PLC的整體性能的性和封閉性。

PAC的輕便控制引擎是非常杰出的。PAC設計了一個通用的、軟件形式的控制引擎用于應用程序的執行，控制引擎在實時操作系統與應用程序之間，這個控制引擎與硬件平臺無關，可以在不同平臺的PAC系統間移植。因此對于用戶來說，同樣的應用程序不需根據系統的功能需求和投資預算選擇不

能的PAC平臺。這樣，根據用戶需要的迅速擴展和變化，用戶的系統和程序無需變化，即可無縫移植。PAC的操作系統采用通用的實時操作系統，如GE Fanuc的PACSystems系列產品即采用通用的、成熟的WindRiver公司的VxWorks實時操作系統，其可靠性已經得到大量的應用的證實。PAC系統的硬件結構采用標準的，通用的嵌入式系統結構設計，這樣其處理器可以使用的高性能CPU，如GE Fanuc的PACSystems 系列產品的CPU 即采用了Pentium300/700MHz 處理器，而且即將推出PentiumM 處理器的CPU。

例如，研華公司全新一代的PAC控制器APAX-5000 系列，集合了控制、信息處理、網絡通訊、影像及語音功能。此系列還具備*的雙獨立式CPU控制架構，分別控制HMI/SCADA及I/O的不同任務，并提供熱備等多種應用架構，軟件部份提供支持國標IEC-61131-3的軟邏輯軟件以及可以進行高級編程的Window.Net 環境下的開發驅動軟件，APAX -5000 非常適用于嚴苛的批次生產應用領域，如：半導體制程設備、制藥、風力控制、鋼鐵、IC檢測機臺控制及食品飲料業。

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Compact AS12X14

Numatics 225-285B

CKD D300-10 

Ashcroft AMC4296

SMC VVS8060-11A

Numatics M029004

Wilkerson V18-04-0000

Numatics 239-1816

Numatics 139-124P

Numatics 139-308P

Wilkerson V28-03-0000

SMC KQR06-10

SMC CG-T063

SMC AR20-N02-Z

Numatics 062BA415M

Wilkerson V08-02-0000

SMC VV71-P-02

Festo LRLL-M5-QS-6

Spears 829-020