Mitsubishi Electric MELSEC iQ-R Series User Manual page 146

Drive information
The following table lists the special relay areas relating to the drive information.
No. Name
SM632 Data memory write error
SM633 Data memory write flag
SM634 Number of rewriting
operations error to data
memory flag
APPX
144
Appendix 3 List of Special Relay (SM) Areas
Data stored Details
Off: No write operation/ This relay is turned on when a write error is
normal detected during write operation to the data
On: Write error memory. This relay is turned off when the write
instruction is issued.
Off: No write operation This relay is turned on when the write
On: Executing write processing to the data memory is in progress.
operation This relay is turned off when the write
processing is completed.
Off: The number of rewrite This relay is turned on when the number of data
operations is lower memory rewriting operations reaches 100000.
than 100000 (The remote head module needs to be
On: The number of rewrite replaced.)
operations reaches
100000
Set by (setting timing)
S (Writing)
S (Writing)
S (Writing)