文章对PC 与PLC 串行通信在钻孔、攻丝专用机床上的应用进行介绍:包括系统结构、参数设置、通信协议、通信程序等。利用上位计算机,实现对其运行状态的监测和实时控制。 关键词:上位计算机 PLC 串行通信专用机床 Abstract: This paper introduces an application of the communication between PC and PLC in special machine tool applied o drill hole and tap .Its system structure, setting up parameter, communication agreement and communication program etc. re introduced in the paper. The running state in the system can be monitored and controlled real time by top-computer. Keywords:top-computer ; PLC ; serial communication ; special working machine tool