quote:以下是引用技工在2009-05-14 13:26:30的发言：

下装了空块就一定会不停机吗?

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照抄了一段手册的描述:
You can modify the default maximum cycle time in STEP 7 (cycle monitoring time). When
this time has expired, OB 80 is called. In OB 80 you can specify how the CPU is to react to
time errors. If you do not retrigger the cycle time with SFC43, OB 80 doubles the cycle time
at the first call. In this case, the CPU goes to STOP at the second call of OB 80.
If there is no OB 80 in the CPU memory, the CPU goes to STOP.
不处理CPU也还是要停的!!!!!!

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