Mitsubishi Electric MELSEC iQ-R Series User Manual page 114

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 Use one of the following SD memory cards manufactured by Mitsubishi Electric.
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.
6 RECORDER MODULE (DETAILED SPECIFICATIONS)
112
6.4 Buffer Memory
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.
*2