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MELSEC-Q
4 SEQUENCE PROGRAM CONFIGURATION AND EXECUTION
CONDITIONS
(2) Flow of each program of High Performance model QCPU
The flow of each program after power-ON or STOP of the PLC to RUN switching
of the CPU module is shown below.
Initial execution
type program
Executed only once at power ON
or STOP to RUN.
END processing
Scan execution
type program
Run only when execution request
is given.
Low speed execution
type program
Run only when "constant scan" or
"low speed program execution time"
has been set.
Stand-by type
program
Power ON/STOP to RUN
Program run at specified cyclic
time intervals
Fxied scan execution
type program
POINT
Not all execute types need to be set for the High Performance model QCPU.
Use the items marked with "
" as needed, such as the Initial execution, low speed
execution, stand-by and fixed scan execution type programs.
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