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Structure and Operation
Section 1-3
Immediate Refreshing
IORF(97) can be executed in the program to refresh a specified range of I/O
words. The specified I/O words will be refreshed when IORF(97) is executed.
IORF(97) can be used to refresh I/O from the main program or the interrupt
program.
When IORF(97) is used, the cycle time is extended by the time required to
refresh the specified I/O words.
Cycle
time
Overseeing processes
Main program
I/O refreshing
RS-232C port servicing
Peripheral port servicing
IORF(97) executed.
Immediate refreshing
I/O refreshing
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