目前 ,在组合机床自动控制领域里 ,可编程序控制器 (ＰＬＣ)已占主导地位 ,随着技术的发展、水平的提高及用户的要求 ,故障诊断日趋成为主要课题。就故障诊断而言 ,我个人认为可分成直接故障和间接故障 ,或叫做硬件故障和软件 (程序 )故障。对于直接故障来说 ,国内外各厂家大都 At present, programmable logic controller (PLC) has occupied the dominant position in the field of automatic control of combined machine tools. With the development of technology, the improvement of level and the requirement of users, fault diagnosis has become a major issue day by day. In terms of troubleshooting, I personally think that can be divided into direct and indirect failures, or hardware failure and software (program) failure. For direct failure, most of the manufacturers at home and abroad