Rockwell Automation Logix5000 Controllers Controller Information and Status Programming Manual - Manual (Page 30)

Chapter 3 Controller logging
Controller logging counters
Three counters, listed in the following table, provide real-time statistics about
modifications to the controller.
Counter Name Description Access
Total Entry Count Number of entries added to the log since the last firmware
update. GSV/SSV
Unsaved Entry Count Number of entries in controller RAM not yet written to the
CompactFlash card. GSV
Modify Execution Count Count that specifically tracks modifications that can change
behavior of a running controller. A subset of entries increment this
count.
GSV/SSV
Total Entry Count
Total Entry Count is the number of controller entries that have been added since
the last firmware update. This counter increments after any entry is added to the
log, and it is written to the log in the Record Number field. You can use a Set
System Value (SSV) instruction to set it to a known value. This can be useful, for
example, for monitoring system changes during a production run.
The following rung of ladder logic shows how to retrieve the Total Entry Count
by using a Get System Value (GSV) instruction.
30 Rockwell Automation Publication 1756-PM015F-EN-P – October 2014