Mitsubishi Electric MELSEC iQ-R MES Series User Manual page 73

Removing or replacing an SD memory card
Make sure to stop the file access before removing or replacing the SD memory card. (If the power is OFF and the file access
is not stopped, turn the power ON and stop the file access.)
Otherwise, the data in the SD memory card being accessed may be corrupted or a file system failure may occur.
Check that the SD memory card is not being formatted since it can be formatted while stopping the file access.
The setting of MES interface module is saved in the SD memory card. Therefore, write the setting after replacing the SD
memory card as necessary.
Files in an SD memory card
Do not edit a file or folder in an SD memory card directly by inserting the card in a personal computer.
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Make sure to use an SD memory card by inserting in an MES interface module.
SD memory card life
An SD memory card has a life (a limit on the number of times for writing data). For details, refer to the specification of an SD
memory card to use.
Generally, an SD memory card life depends on the free capacity. Set the DB buffering capacity, which should be set by a user,
so that the SD memory card has a sufficient free capacity. (An SD memory card can be used for long time with enough
capacity.)
4 PROCEDURE BEFORE OPERATION
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4.3 SD Memory Card