一个1/0故障屏显示该信息的示例如下。故障组PLC CPU软件故障中的故障是由系列90-30/90-20或Micro PLC CPU的操作软件产生的。它们将在系统运行的许多不同点上出现。每当一个致命性故障出现,PLC CPU便立即转人特定的故障扫描(ERRORSWEEP)状态。当PLC处于这种状态,其被允许的唯一操作是与编程器的通讯联络。清除这种故障的唯-途径是给PLC循环通电。该组教障作用是致命性的。
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