Mitsubishi Electric MELSEC iQ-R Series User Manual page 13

■Turning the power OFF or resetting a CPU module
• If the power is turned OFF or a CPU module is reset while data is being written to an SD memory card, the writing may not
be completed. A high speed data communication module automatically recovers files when the power is turned ON again,
but the recovery will not succeed in some cases. If any problem arises, turn the power OFF or reset the CPU after stopping
file access. Page 52 Method for stopping file access
For the important data, create backups periodically.
■Removing or replacing an SD memory card
• Make sure to stop file access before removing or replacing an SD memory card. (Page 52 Method for stopping file
access)
• Not following the procedure in the following section may cause a corruption of data in an SD memory card that is being
accessed, a file system error, or false recognition of the mounting status of the SD memory card.
Page 50 Operations for removing or reinserting an SD memory card
• If an error occurs on an SD memory card, refer to the following:
(MELSEC iQ-R High Speed Data Communication Module User's Manual (Application))
• High speed data communication module settings are saved on an SD memory card. Therefore, the IP address of the high
speed data communication module returns to the initial status (192.168.3.3) when turning the power OFF and ON or
resetting a CPU module without an SD memory card inserted in the module or without the settings written to the SD
memory card. As necessary, read the current settings before removing the SD memory card, and promptly write those
settings to the new card after replacing the card.
■SD memory card capacity
• A minimum size occupied by the files on the hard disk varies depending on the SD memory card capacity. Therefore, the
actual file size and the occupied file size on the hard disk may differ.
■SD memory card diagnostic time
• A high speed data communication module diagnoses data (recovers a file, etc.) in an SD memory card inserted in the
module at the following timings:
●When turning the power OFF and ON or resetting a CPU module
●When inserting an SD memory card while the power is ON
■Formatting an SD memory card
• Use the format function of Configuration Tool to format an SD memory card. (MELSEC iQ-R High Speed Data
Communication Module User's Manual (Application))
• Do not format an SD memory card using the format function of Windows.
• Do not reset the control CPU or turn the power OFF when formatting an SD memory card.
• High speed data communication module settings are saved on an SD memory card. Therefore, all settings are lost when
formatting the SD memory card. As necessary, read the current settings before formatting, and promptly write those
settings after formatting. The IP address of the high speed data communication module returns to the initial status
(192.168.3.3) when turning the power OFF and ON or when resetting a CPU module without writing the settings to the SD
memory card.
■SD memory card life span (Limit on writing)
• 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.
■Write protect switch
• Make sure that the write protect switch of the memory card is in the unlocked position. When the write protect switch is in
the locked position, no file can not be written on the SD memory card.
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