| 詳細參數(shù) | |||
|---|---|---|---|
| 品牌 | GE | 型號 | IC693ALG391 |
| 結(jié)構(gòu)形式 | 模塊式 | 安裝方式 | 控制室安裝 |
| LD指令處理器 | 硬PLC | I/O點數(shù) | IC693ALG391 |
| 功能 | IC693ALG391 | 工作電壓 | 220 |
| 輸出頻率 | 220 | 處理速度 | 20 |
| 程序容量 | 10 | 數(shù)據(jù)容量 | 20 |
| 產(chǎn)品認證 | ccc | 環(huán)境溫度 | 10 |
| 環(huán)境濕度 | 10 | 加工定制 | 否 |
| 重量 | 1 | 產(chǎn)地 | 美國 |
| 外形尺寸 | 10 | ||
IC693ALG391
IC693ALG391
IC693ALG391
工程師們盡量避免了出現(xiàn)這種二重性，即將Spectrum Controls公司的HART I/O模塊用于Allen-Bradley公司的ControlLogix PLC上，而后者集成了模擬輸入輸出、以及通過現(xiàn)有布線系統(tǒng)向現(xiàn)場儀器讀、寫HART數(shù)據(jù)的能力。這排除了對外部硬件的要求，并能通過控制系統(tǒng)網(wǎng)絡來提供對HART數(shù)據(jù)的完全訪問。
據(jù)工程師Steven Stiphttp://a.gongkong.com/meiti/meiti/pich 介紹說，Kraft主要將HART用于其系統(tǒng)的維護及試運行，并已經(jīng)使用了6年。在正常情況下，Kraft一般只訪問那些被認為是關鍵的數(shù)據(jù)。隨后Kraft將實施一個多路復用系統(tǒng)，并利用一個通信適配器來將該系統(tǒng)與PLC進行接口。Stiphttp://a.gongkong.com/meiti/meiti/pich說：“與其他PLC接口解決方案比較，HART I/O可與我們的HART儀表進行無縫接口”。
Stiphttp://a.gongkong.com/meiti/meiti/pich聲稱：與HART I/O有關的費用節(jié)省是巨大的。安裝多路復用器一般要求有額外的布線及面板空間，以提供與多路復用器的連接、以及多路復用器與模擬I/O之間的橋接布線等；而且必須有一個通信橋接模塊來將多路復用器數(shù)據(jù)連入PLC底板中。Stiphttp://a.gongkong.com/meiti/meiti/pich說：“安裝HART I/O，就如同安裝一個標準的模擬模塊那樣簡單，且不需要有額外的面板空間或布線”。
每HART I/O點的成本節(jié)省超過600%，并且與標準模擬采集系統(tǒng)的成本相當；與多路復用器配置下的每I/O點818美元的成本相比，每HART I/O點的成本僅有131美元。
I/O裝置對傳統(tǒng)的模擬電流回路值進行測量，并利用HART通信來對流量計進行輪詢（Kraft使用一臺Endress+Hauser公司產(chǎn)的Promass 63型質(zhì)量流量計），提供包括流速、密度、溫度及總量值在內(nèi)的多個變量。而這些測量值又可用來計算分離器的效率。
系統(tǒng)所增加的收益是：現(xiàn)在操作員可通過PLC的以太網(wǎng)網(wǎng)絡從一臺工作站來訪問HART數(shù)據(jù)。利用工廠資產(chǎn)管理軟件可監(jiān)視裝置的運行情況，且不用離開工作站就能進行實時故障診斷。HART I/O為Kraft提供了一種控制及監(jiān)視其處理過程的、經(jīng)濟高效且靈活的解決方案。
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