Chapter 4 CPU Function
4 - 14
4.4 Operation Mode
The CPU operates in one of the three modes - RUN, STOP, and PAUSE mode. The followi
ng describes operation processing in each operation mode.
4.4.1 RUN mode
In this mode, programs are normally operated.
The first scan start in the RUN
Initialize data area according to the
reset restart mode.
Check the program and determine it
can be executed or not.
Execute input refresh
Check the availability of expansion
units
Execute output refresh
Execute communication and internal
Operation mode is changed?
No
Yes
Operate with new mode.
Execute programs and Interrupt
tasks
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