Mitsubishi Electric MELSEC iQ-R Series - Page 150

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10 MEMORY CONFIGURATION OF THE CPU MODULE
10.1 Memory Configuration
■Operation of each function accessing the SD memory card
Disabling the SD memory card affects the operation of each function accessing the SD memory card. For the functions shown
below, the following table shows the operations when the SD memory card forced disable instruction is executed during
access to the SD memory card and when access is made to the SD memory card after the SD memory card is disabled.
*1 Same as the operation when the SD memory card is not inserted
Precautions
Do not delete or rename the folders or files being accessed or those being executed by a function.
■Precautions when forcibly disabling the SD memory card
• When forced disable operation with the SD CARD OFF button and forced disable operation by SM606 are executed
together, the operation executed earlier is enabled, and the operation executed later is disabled. For example, after the SD
memory card is forcibly disabled with the SD CARD OFF button, when SM606 is turned on and off without removing the SD
memory card, the disabled status of the SD memory card can be canceled. However, after forcibly disabling the SD
memory card with the SD CARD OFF button, even by removing the SD memory card, turning on SM606, and inserting the
SD memory card, the SD memory card is not enabled. To enable the SD memory card, after it is inserted again, SM606
must be turned off.
• If this function is executed while an external device is writing a file to the SD memory card, writing of the file may fail. Cancel
the SD memory card disable status, then write the file again.
Function being executed SD memory card forced disable
instruction executed during access to the
SD memory card
Access made to the SD memory card
after the SD memory card is disabled
Boot operation 
• Access to device comment or label in SD
memory card
• Device/label initial value operation at status
change from STOP to RUN
The SD memory card becomes disabled after the
executed function is completed.
An error occurs in the CPU module.
*1
Access to SD memory card by engineering tool,
SLMP, FTP function
The function is responded to with an error. The function is responded to with an error.
Instruction to access SD memory card The SD memory card becomes disabled after the
instruction is completed.
The instruction is completed with an error.
CPU module data backup/restoration function When the processing for the file being backed up/
restored is completed, the SD memory card is
disabled, the executed function is completed with
an error, and the error cause is stored in the
special register.
The error cause is stored in the special register.
iQ Sensor Solution data backup/restoration
function
After the backup or restore operation is completed,
the SD memory card is disabled.
The function is responded to with an error.
File transfer function (FTP client) When the processing for the file during file transfer
execution is completed, the SD memory card is
disabled, the file transfer function instruction is
completed with an error, and the error cause is
stored in the completion status.
The file transfer function instruction is completed
with an error, and the error cause is stored in the
completion status.