APPENDIX
A-2 USER’S MANUAL
Breakdown of END Processing Time
The END processing time depends on the MICRO
3
settings and system configuration. The total of execution times for
applicable conditions shown below is the actual END processing time.
Note 1: Calendar/clock function is processed once every 500 msec in the 16- and 24-I/O MICRO
3
base units. The 10-I/O
MICRO
3
base unit does not have the calendar/clock function.
Note 2: Data link slave stations are processed in interrupt processing asynchronous to the ordinary system processing.
Processing times of advanced instructions are generally approximately 20 µsec longer in the high-speed processing mode
than in the standard processing mode.
In addition to processing user program instructions and END instruction, the MICRO
3
system processing includes interrupt
processing of various functions.
Item Condition Execution Time
Housekeeping
Standard processing mode 200 µsec
High-speed processing mode 220 µsec
I/O service
Base unit only 130 µsec
Expansion link system 9 to 10 msec
Control data register service All control data registers enabled 15 µsec
Calendar/clock function processing (see note1) 150 µsec
Data link master station processing (see note 2) Data link system 12.5 to 13 msec
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