Chapter 4. CPU module
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4.3.2 Program Execution Procedure
The followings explain the program execution procedure when the power is applied or the mode setting switch
of CPU module is in the RUN status.
Program operation processing is executed as the procedure given below
REMARK
1) *1 : In the GLOFA PLC, the time driven interrupt task programs and event driven interrupt task
programs are called task program.
Event driven programs are classified into single task(internal interrupt) or interrupt task (external
interrupt) according to the S/W and H/W interrupt signaling method.
Operation start
Initialization program
Scan program
External task program
Time driven task program
Internal task program
•
Executed when the power has been applied
or the CPU operation is in the Run mode
•
Restart operation is executed complying with
the initialization task(_INIT,
H
INIT)
Executed only when the condition
has been satisfied.
Executed only when the condition
has been satisfied.
*1
END processing
