Mitsubishi A1SJH(S8) User Manual page 70

4. CPU MODULE
(2) Storing order in the user memory
Each data set by the parameters are stored in the order shown below:
Execute the memory protect after confirming that the write area during execution of
the sequence program such as a file register is not in the memory protect range.
(a) When the main program data is written to ROM
Even if the main program is written to ROM, it cannot be used for other use.
Which is because the same built-in RAM area (the area in the fig.*1) is used in
the system as the case that RAM is running .
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