IC693PCM311 PLC除具有中檔PLC的功能外，還增加了帶符號算術運算、矩陣運算、位邏輯運算、平方根運算及其他特殊功能函數的運算、制表及表格傳送功能等。PLC具有更強的通信聯網功能，可用于大規模過程控制或構成分布式網絡控制系統，進而實現工廠自動化。

3.按I/O點數分類

根據PLC的I/O點數多少，可將PLC分為小型、中型和大型三類。

（1）小型PLC

小型PLC的I/O點數小于256，具有單CPU及8位或16位處理器，用戶存儲器容量為4KB以下。例如：三菱FX0S系列。

（2）中型PLC

中型PLC的I/O點數在256～2048，具有雙CPU，用戶存儲器容量為2～8KB。

IC693PCM311大型PLC

大型PLC的I/O點數大于2048，具有多CPU及16位或32位處理器，用戶存儲器容量為8～16KB。

上，PLC產品可按地域分成三大流派，一個流派是美國產品，一個流派是歐洲產品，一個流派是日本產品。美國和歐洲的PLC技術是在相互隔離情況下獨立研究開發的，因此美國和歐洲的PLC產品有明顯的差異性。而日本的PLC技術是由美國引進的，對美國的PLC產品有的繼承性，但日本的主推產品定位在小型PLC上。美國和歐洲以大中型PLC而聞名，而日本則以小型PLC著稱。

IC693PCM311  

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