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1 PROGRAM EXECUTION
1.1 Scan Configuration
1 PROGRAM EXECUTION
1.1 Scan Configuration
The configuration of the scan of the CPU module is explained below.
Initial processing and initialization processing in RUN mode
Initial processing according to CPU module status and initialization processing in the RUN status are explained below.
: Execute, : Do not execute
*1 Indicates an instance of power OFFON or setting to RUN status without a reset after modifying parameters or program in STOP
status.
Processing item CPU module status
At power ON At reset STOPRUN after
write to PLC
*1
At STOPRUN
Initialization of input/output module
Boot from SD memory card
CPU parameter check
System parameter check
Initialization of device/label outside latch range
(bit device: OFF, word device: 0)
Assignment of I/O numbers of input/output
module
Setting of module parameters
Setting of device
Inside the CPU module
Scan configuration
Program operations
END processing
Initial processing/RUN time
initialization processing
I/O refresh