1.產品說明
SIMATICS7-400 PNH系統可以根據具體應用需求量身定制：性能可擴展、冗余度可靈活組態，安全功能易于集成。集成PROFINET接口，可冗余連接I/O設備，或者通過PROFIBUS連接I/O設備，實現工廠通信。無論何種應用，使用SIMATIC S7-400 PNH，均可在熟悉的STEP7 工程環境中，進行便捷而有效的編程和組態。
2.應用
避免控制器故障引起的停機。主要用于生產、能源、供水系統、機場助航照明、編組站系統等域。避免因工廠故障造成數據丟失而導致的高昂重啟成本。主要用于行李處理、高架倉庫、跟蹤和追溯等域。在工廠或機器停機時保護工廠、工件和材料。主要用于爐子、半導體、船舶等域。無監督和維修人員亦能保障正常運行。主要用于污水處理廠、隧道、船閘、樓宇系統等域。
3.效益
簡單、高效的工程組態與在標準系統中一樣，SIMATIC S7-400H 可以使用所有 STEP 7 編程語言進行編程。可以很容易的把程序從標準系統遷移到冗余系統中，反之亦然。當加載程序時，它會自動傳送到兩個冗余控制器中。使用 STEP 7，可以對特定冗余功能和配置進行參數設置。
4.出色的診斷和更換優勢
利用集成的自我診斷功能，系統可以提前檢測故障和發送信號，避免故障對生產過程產生影響。這樣可以有針對性地替換故障組件，加快維修進程。可以在系統運行過程中對所有組件進行熱插拔。更換一個 CPU 后，當前的所有程序和數據可以自動重新裝載。即使在系統運行過程中，也可以修改程序（例如，程序塊的修改和重新裝載），更改配置（例如，增加或刪減 DP從站或）以及改變 CPU 的內存分配。
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