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结合ＨＣＭ－Ⅰ型超精密车床的实际情况，阐明了采用内嵌式可编程控制器的必要性，详细介绍了内嵌式ＰＬＣ的结构及工作原理，给出了ＰＬＣ关键硬件技术的设计原理及电路图
Combined with the actual situation of HCM-Ⅰ ultra-precision lathe, the necessity of using embedded programmable logic controller is expounded. The structure and working principle of embedded PLC are introduced in detail. The design principle of PLC key hardware technology is given. Circuit diagram