ab plc防通讯中断技术.doc

AB PLC防通讯中断技术
高莹
(中国有色(沈阳)冶金机械有限公司辽宁:110141)
摘要:PLC(可编程序控制器)在工业生产中已经广泛应用,AB PLC在国内的应用也是越来越多,特别是我公司生产的铝电解多功能高位机组,大都应用的是该品牌的PLC,采用了三点通讯的网络结构,而最近几年应用在铝电解多功能高位机组上的AB PLC出现通讯中断的问题,本文针对AB PLC通讯中断,介绍AB PLC通讯中断后的具体现象,对造成PLC通讯中断的干扰源进行详细的分析,阐述这些干扰源对PLC进行干扰的主要途径,介绍外界干扰的计算方法,提出解决AB PLC通讯中断的措施和具体方案,说明在程序上怎样解决这一干扰问题,给出通讯中断诊断系统程序的编辑思路和编辑方法,同时用逻辑顺序图描述通讯中断诊断系统的程序扫描过程,提高了整个电控系统的稳定性和安全性,取得了满意的效果。
Abstract: PLC (Programmable Logic Controller) has been widespread used in industrial production . Especially ,the application of AB PLC which pany multi-functional high electrolytic units mostly used that is more and more popular in the country .It takes three-work structure, in last years, some problems munication interruption of the AB PLC used for the multi-functional high electrolytic e out .For munication interruption of AB PLC ,this article introduces the exact phenomenon after AB munication interrupted,detailed analysis on the interference source of munications interruption ,explains the main approach of PLC interfered by interference source ,introduces the method of calculation of outside interference ,puts forward the special method that how to solve this interference problem, explains how to deal with it by programm ,gives the editing thinking and way for the programme munications interruption inspection ,describes the programme scan process of munications interruption inspection system thr