Mitsubishi Electric MELSEC iQ-R Series User Manual page 256

Symptom
Cannot recognize the SD memory card.
(CARD RDY LED does not turn ON.)
The access speed to the SD memory card
becomes slower.
The specified size of free space cannot be
ensured in the SD memory card.
Unable to create the saved files as many
as specified.
The total capacity, free space, and usage
rate of the SD memory card are not
displayed.
Unable to start logging when the SD
memory card is inserted.
Unable to write the file.
The CARD RDY LED remains flashing
after removing the SD memory card.
4 TROUBLESHOOTING
254
4.3 Troubleshooting by Symptom
Check point
Is the SD memory card inserted correctly?
Has the SD memory card been formatted in another
device such as a personal computer?
Is the control CPU reset or the power is turned OFF
during formatting?
Was the power turned OFF or control CPU reset when
writing data to the SD memory card?
Is the write protect switch of the SD memory card
locked?
Are the files saved up to the capacity limit of the SD
memory card?
Are there any files on the SD memory card other than
saved files created by the data logging, event logging
or report function operated on the high speed data
logger module?
Is the size excluding the total size of the files not to be
deleted from the total space of the inserted SD memory
card larger than the specified size of free space?
Is the SD memory card setting configured?
Are the files saved up to the capacity limit of the SD
memory card?
Is the access state 'Access stop'?
Is the access state 'Formatting'?
Is the access state 'Preparing access'?
Is the access state 'Card error detected'?
Have the settings already been written to the SD
memory card?
Have the settings already been updated?
Have the settings with the Auto logging function set to
be enabled already been written to the SD memory
card?
Is the write protect switch of the SD memory card
locked?
Was the SD memory card removed while mounting it
(while the CARD RDY LED is flashing)?
Corrective action
• Remove it once and insert again.
• Format SD memory card by using high speed data
logger module.
• Stop file access before turning OFF the power or
reset the control CPU. (MELSEC iQ-R High
Speed Data Logger Module User's Manual (Startup))
• Format SD memory card. (Page 221 SD
memory card diagnostics)
• Unlock the write protect switch of the SD memory
card and insert it again.
• Use the SD memory card maintaining 10% or more
free space on the card.
• Delete unnecessary files from the SD memory card.
• Review the settings such that the size excluding the
total size of the files not to be deleted from the total
space of the inserted SD memory card is smaller
than the specified size of free space. (Page 101
Free Space Adjustment Function)
• Check the SD memory card setting.
• Delete unnecessary files from the SD memory card.
• Delete unnecessary files from the SD memory card.
• Execute 'Access restart'. (Page 221 SD memory
card diagnostics)
• Wait until the access state becomes 'Accessible'.
• Format. (Page 221 SD memory card
diagnostics)
• Replace the SD memory card.
• Write the settings to the high speed data logger
module. (Page 214 Write)
• Export the settings to the inserted SD memory card.
(Page 129 Exporting module operating file)
• Update the settings. (Page 216 Module
diagnostics)
• Set the auto logging function. (Page 144
Logging operation setting)
• Unlock the write protect switch of the SD memory
card and retry.
• Turn the power OFF  ON or reset the CPU module.
(Do not remove the SD memory card while mounting
it. Make sure to stop file access before removing the
SD memory card.)