Description
PLC是面向工矿企业的工控设备。它接口容易，编程语言易于为工程技术人员接受。梯形图语言的图形符号与表达方式和继电器电路图相当接近，为不熟悉电子电路、不懂计算机原理和汇编语言的人从事工业控制打开了方便之门。
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