煤矿综合自动化系统中PLC掉电处理方法

Handling method of PLC power down in mine integrated automation system

针对煤矿综合自动化系统中因突发情况出现胶带运输系统PLC掉电,从而使逆煤流方向胶带未能及时停车而导致的堆煤事故,重点提出了一种软件层面的PLC掉电处理方法。该方法主要通过检测远程I/O分站中通信模块ENBT的状态,判断I/O分站是否掉电,然后再根据互锁关系,使逆煤流方向的胶带停止运行,从而实现相关胶带及时停车,避免堆煤事故的发生。

For PLC power down problem of belt transportation system due to emergency in mine integrated automation system, which makes belt of inverse direction of coal flow fail to stop and results in coal piling accident, a handling method of PLC power down with software-level was proposed. The method judges power down of I/O substation mainly by detecting communication status of ENBT module of remote I/O substation, then stops running of the belt of inverse direction of coal flow accoding to interlocking relationship, so as to make relevant belts stop timely and avoid accidents of coal piling.