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排除ＰＬＣ的一种难以发觉的故障广州港新沙港务公司黄彦辉我港一台１０ｔ─３３ｍ／１６ｔ─２５ｍ门座起重机在使用中出现只能左旋不能右旋的故障。现场维修部门查修数日未发现故障点。对此，笔者作了如下处理：第一步：分清故障点在ＰＬＣ，还是在外围电路或元件上。经...
Exclusion of a difficult PLC fault Guangzhou Port Xinsha Port Huang Yan Hui company in Hong Kong 10t ─ 33m / 16t ─ 25m Portal crane in use there can only be left-handed rotation can not be dextral fault. On-site maintenance department did not find the fault point for a few days. In this regard, I made the following treatment: The first step: to distinguish the point of failure in the PLC, or in the peripheral circuits or components. through...