Considerations For Using An Sd Memory Card - Mitsubishi Electric MELSEC iQ-R Series User Manual

Considerations for using an SD memory card

• For inserting or removing an SD memory card while the power is ON, follow the procedure.
Failure to do so may cause data corruption in the SD memory card.
• If there is any function accessing an SD memory card when removing the SD memory card, the CARD RDY LED turns OFF
after the access is completed.
Therefore, the time until the CARD RDY LED turns OFF differs for each function.
SD memory card to be used
Use a supported SD memory card. (Page 75 SD memory card (sold separately, required))
If another SD memory card is used, data in the SD memory card may be corrupted or the system may stop.
When using an SD memory card used for other uses, make sure to format the card in MES Interface Function Configuration
Tool. (MELSEC iQ-R MES Interface Module User's Manual (Application))
Formatting an SD memory card
Format an SD memory card in the "SD Memory Card Diagnostics" screen of MES Interface Function Configuration Tool.
(MELSEC iQ-R MES Interface Module User's Manual (Application))
Do not format an SD memory card with standard format commands of an operating system such as Windows.
Turning the power OFF or resetting a CPU module
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.
Removing or replacing an SD memory card
Make sure to stop file access before removing or replacing an 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 an SD memory card. Therefore, write the setting after the replacement 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.
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
70
4.3 SD Memory Card