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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.
: Performed, : Not performed
*1 Indicates an instance of power OFFON or setting to RUN status without a reset after modifying parameters or program in STOP
status.
At STOPRUN after writing to the FX5U/FX5UC CPU module, the following operations are added in CPU
module firmware version "1.015" or later. The FX5S/FX5UJ CPU modules support the following operations
from the first released product.
• When stored in CPU module: Update program file, FB files, global label setting file, initial device value file
• When stored in SD memory card: Update initial device value file
However, if other parameters are changed, the above is not updated. To update, please perform power supply
OFFON or reset.
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
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