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我公司石灰石取料机采用西门子S7-300 PLC作为控制核心,采用西门子IP170B触摸屏作为人机界面。全车动力负荷大于250k W,动力电源从距离取料机约1 500m远的电力室供电。1改造背景自取料机投运以来,由于线路较远,在启动刮板和料耙电动机时经常造成压降过大,导致启动接触器吸合不好,除经常出现触点粘连现象,还会使得PLC发出驱动命令后0.5s内没有收到该设备运行信号(作为驱动正常反馈),从而判断驱动失败,发出“驱动不
Limestone reclaimer of our company adopts Siemens S7-300 PLC as the control core, adopts Siemens IP170B touch screen as human-machine interface. The entire vehicle dynamic load is greater than 250k W, power supply from the distance of about 1 500m remoter power room power supply. 1 retrofit background since the feeding machine put into operation, due to the line farther, when starting the scraper and rake motor is often caused when the pressure drop is too large, leading to start contactor pull is not good, in addition to frequent contact adhesion occurs, but also Will make the PLC send a drive command within 0.5s did not receive the device running signal (as a normal feedback drive), to determine the driver failed to issue ”driver