Program Flow - Mitsubishi Electric MELSEC iQ-R Series User Manual

8.4

Program Flow

Programs are executed in order when the CPU module is switched to the RUN state according to the program execution type
and execution sequence settings (Page 101 Program Execution Type, Page 112 Execution type change).
STOP → RUN
Initial processing
Does
an initial execution type
program exist?
Does not exist
I/O refresh
Scan execution
type program
END processing
Programs with the same execution type are executed according to the execution sequence settings.
8 RUNNING A PROGRAM
100
8.4 Program Flow
Exists
I/O refresh
Initial execution
type program
Standby type
program
Fixed scan execution
type program
Event execution
type program