Research on fault diagnosis and running with fault method in dynamic system based on PLC
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摘要: 介绍了基于PLC(Programmable Logical Controller)的动态控制系统的故障诊断的基本原理、实现方法.为提高控制系统的可靠性,提出了一种基于梯形图软件设计利用信号输出模块屏蔽故障点实现故障检测与容错处理功能,使系统能够带故障运行的方法,并以实例说明了这种方法在避免和减少这些故障对系统影响方面是重要而且可行的.Abstract: The fundamental and means of realization of fault diagnosis was introduced, which can be applied in the dynamic system controlled by PLC controller. In order to improve the reliability of the control system, one method that is realized by programming the ladder diagram to make use of the output module to shield the exception points was presented, which can realize fault detection and tolerance control function in the running process of the dynamic control system and can be even enable the system to run with fault. The applied instance illustrated that the method is very feasible in avoiding or reducing the fault effect on system.
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Key words:
- fault diagnosis /
- fault-tolerant technique /
- lifts /
- programmable logical controller
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