Description
每次扫描用户程序之前,都先执行故障自诊断程序。自诊断内容为I/O部分、存储器、CPU等,发现异常停机显示出错。若自诊断正常,继续向下扫描。PLC检查是否有与编程器和计算机的通信请求,若有则进行相应处理,如接收由编程器送来的程序
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