Mitsubishi Electric MELSEC Q Series User Manual page 277

6 FUNCTIONS
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REMARKS
(1) When the file storage has been set to the standard ROM
When the logging file storage has been set to the standard ROM in the logging
setting, pay attention to the setting of the free space of the user area in the
standard ROM or the number of write times to standard ROM. ( 1) ( 2)
1 For the free space of the user area, it is required to consider the capacity of
the logging file, user HTML file and user data file. (User area capacity of
standard ROM: 5MB)
2 For the size of the data written to the standard ROM drive, refer to
Appendix 7.1.
(2) Confirming the usage status of the standard ROM drive
The usage status of the standard ROM drive can be confirmed as the number
of standard ROM erase execution times in the number of standard ROM erase
area (buffer memory: 10 to 11) of the buffer memory.
When the standard ROM has been erased frequently, take preventive
measures, e.g. stop logging or change storage place of the logging file to the
CompactFlash card.
MELSEC-Q
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