Mitsubishi Electric MELSEC iQ-R Series User Manual page 235

SD memory card history information area (Un\G30004 to 30014)
The history information of an SD memory card inserted in a recorder module can be checked.
Buffer memory name
*1
Write count
*1 Available for SD memory cards manufactured by Mitsubishi Electric only. For the SD memory cards, refer to the following:
MELSEC iQ-R System Recorder User's Manual (Startup)
*2 The update frequency of the write count may differ depending on an SD memory card used.
Address Description
Un\G30012 to 30013 The number of writes to an SD memory card is stored.
An SD memory card has a life (a limit on the number of times for writing
data), and use a value in this buffer memory as a guide to determine the time
for replacement.
6 RECORDER MODULE (DETAILED SPECIFICATIONS)
*2
233
6.4 Buffer Memory
6