存儲器分為系統程序存儲器和用戶程序存儲器，系統程序相當于個人計算機中的操作系統，它使PLC具有基本的智能，能完成PLC設計者的規定的各種工作。系統程序由PLC的生廠家設計并固定化在ROM（只讀存儲器）中，用戶不能讀取。用戶程序由用戶設計，它使PLC能完成用戶要球的特定功能，用戶程序存儲器的容量以字節（B）為單位。


聯系人：黃生(銷售工程師) 
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