Mitsubishi Electric MELSEC-Q00U(J)CPU User Manual page 181

Automatic data transfer to the program memory can be disabled in the "Options" window of the programming tool.
To avoid automatic transfer of program
memory data, clear the checkbox.
(Selected by default.)
When the automatic data transfer is disabled, the following message appears after online change.
Selecting "Yes" transfers data to the program memory. When selecting "No", execute "Program Memory Batch Download"
from the programming tool.
Program transfer status can be checked in the special relay (SM165).
When SM165 is on, the program memory batch transfer has not completed. When SM165 is off, the program memory batch
transfer has completed.
Note 3.7
Universal
When checking the transfer status with the Q02UCPU, Q03UDCPU, Q04UDHCPU, or Q06UDHCPU, check the versions
of the CPU module and programming tool used. (
Note 3.7
Note 3.7
Page 465, Appendix 2)
CHAPTER 3 FUNCTIONS
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