摘要
对ＰＬＣ在ＣＮＣ系统中的应用作了全面地描述。并就ＣＮＣ蛇形管弯管机的特点和工艺要求，对ＰＬＣ的选型、Ｉ／Ｏ单元的配置、输入输出地址的分配以及系统软件的设计和通讯作了详尽的讨论。
This paper has described comprehensively the application of PLC in the CNC system.It discusses the feature and technical requirement of CNC Snaky Bender.It also discusses in detail all the problems about the type choice of PLC,the configuration of I/O unit, the distribution of I/O address,the system software design and communication.
