標題6SE1200-7AA10-3控制模塊

目前，PLC在國內外已廣泛應用于鋼鐵、石油、化工、電力、建材、機械制造、汽車、輕紡、交通運輸、環保及文化娛樂等各個行業，使用情況主要分為如下幾類：

　　1.開關量邏輯控制

　　取代傳統的繼電器電路，實現邏輯控制、順序控制，既可用于單臺設備的控制，也可用于多機群控及自動化流水線。如注塑機、印刷機、訂書機械、組合機床、磨床、包裝生產線、電鍍流水線等。

　　2.工業過程控制

　　在工業生產過程當中，存在一些如溫度、壓力、流量、液位和速度等連續變化的量（即模擬量），PLC采用相應的A/D和D/A轉換模塊及各種各樣的控制算法程序來處理模擬量，完成閉環控制。PID調節是一般閉環控制系統中用得較多的一種調節方法。過程控制在冶金、化工、熱處理、鍋爐控制等場合有非常廣泛的應用。

　　3.運動控制

　　PLC可以用于圓周運動或直線運動的控制。一般使用專用的運動控制模塊，如可驅動步進電機或伺服電機的單軸或多軸位置控制模塊，廣泛用于各種機械、機床、機器人、電梯等場合。

　　4.數據處理

　　PLC具有數學運算（含矩陣運算、函數運算、邏輯運算）、數據傳送、數據轉換、排序、查表、位操作等功能，可以完成數據的采集、分析及處理。數據處理一般用于如造紙、冶金、食品工業中的一些大型控制系統。

　　5.通信及聯網

　　PLC通信含PLC間的通信及PLC與其它智能設備間的通信。隨著工廠自動化網絡的發展，現在的PLC都具有通信接口，通信非常方便。

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