Considerations For Using Sd Memory Cards - Mitsubishi Electric RD81MES96 User Manual

Considerations for using SD memory cards

• For inserting and removing an SD memory card while the power is ON, follow the procedure.
Failure to do so, the data in the SD memory card may be damaged.
• If any of the functions is accessing the SD memory card when removing it, the CARD RDY LED turns OFF once the
function completes accessing.
Therefore, the time until the CARD READY LED turns OFF may differ depending on the function.
SD memory cards to be used
Use the connectable SD memory cards. (Page 58 Connectable SD memory cards (sold separately))
If other SD memory cards are used, the data may be corrupted in the SD memory card or the system may stop.
When using an SD memory card used for other uses, make sure to format the card with MES Interface Module Configuration
Tool. (MELSEC iQ-R MES Interface Module User's Manual (Application))
Formatting SD memory cards
Format the SD memory card with the SD memory card diagnostics on MES Interface Configuration Function Tool.
(MELSEC iQ-R MES Interface Module User's Manual (Application))
Do not format the SD memory card with standard format commands of operating systems such as Windows.
Powering OFF or resetting CPU modules
When the CPU module is powered OFF or reset while writing data to an SD memory card, the processing to write data to the
SD memory card may not be completed. It may cause a loss of data during DB buffering, corruption of data in the SD memory
card that is being accessed, or occurrence of a file system error. The file is automatically recovered when the MES interface
module is powered ON again, but it will not succeed in some cases.
The operation, powering OFF or resetting the CPU module after stopping file access, should be considered. For the important
data, create backups periodically.
Do not power OFF or reset the CPU module since an SD memory card can be formatted while stopping the file access.
4 PROCEDURE BEFORE OPERATION
4.3 SD Memory Cards
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