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CPU modules Part names and settings of Qn(P)(R)(H)CPUs
4 – 30
4.4.3 Transfer of a program with a programming device
When writing a program with CPU module set to "STOP"
When writing a program with the CPU placed in the STOP status, operate the switches in the fol-
lowing procedure:
● To set to RUN status with device memory data cleared:
Set the RESET/L.CLR switch resp. the RUN/STOP/RESET switch to the RESET position
once and return it to the original neutral position.
Set the mode switch to RUN position.
The CPU module is placed in the RUN status (RUN LED: On).
● To set to RUN status with device memory data not cleared (held):
Set the mode switch (RUN/STOP switch or RUN/STOP/RESET switch) to RUN position.
The RUN LED flashes.
Set the mode switch to "STOP" position.
Set the mode switch to "RUN" position again.
The CPU module is placed in the RUN status (RUN LED: On).
When writing a a program while CPU module is running
When a program is written while CPU module is running, no operation is needed for the switches
of the CPU module.
At this time, the device memory data are not cleared.
NOTE Before writing a program to the CPU module, set the system protect setting switch (DIP
switch: SW1) of the CPU module to off (not protected). Enter the correct password, if the
CPU is password secured.
NOTES When a program was written to the program memory during boot operation, also write the
program to the boot source memory. If the program is not written to the boot source memory,
the old program will be executed at the next boot operation.
If the CPU is stopped and restarted by the programming device after program transfer, no
operation is needed for the switches of the CPU module.
NOTE While the CPU module is running (RUN status) program changes are done in the program
memory.
When a program was written to the program memory while CPU module is running, also
write the program to the boot source memory. If the program is not written to the boot source
memory, the old program will be executed at the next boot operation.