输出映像寄存器的内容取决于用户程序扫描执行的结果。 输出锁存器的内容由上一次输出刷新期间输出映像寄存器中的数据决定。PLC当前实际的输出状态有输出锁存器的内容决定。可靠性高。由于PLC大都采用单片微型计算机,因而集成度高,再加上相应的保护电路及自诊断功能,提高了系统的可靠性。 编程容易。PLC的编程多采用继电器控制梯形图及命令语句,其数量比微型机指令要少得多,一般的小型PLC只有16条左右。由于梯形图形象而简单,因此容易掌握、使用方便,甚至不需要计算机知识,就可进行编程。 From
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产品名称:6SN1118-0NK01-0AA1 PLC控制系统
产品手机链接:http://m.vooec.com/product_220603806.html
产品网站链接:http://www.vooec.com/cpshow_220603806/