发表于:2003-01-24 13:26:00
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An Feild Controller carries out the specified processes at the standard scanning period of n second. If an Feild Controller cannot
finish the specified processes within a n-second scanning period because there are too many function
blocks or too many high-speed scanning blocks, the Feild Controller carries out the remaining processes in the next n-
second period. The remaining processes are not skipped.