Rockwell Automation Logix5000 Controllers Controller Information and Status Programming Manual - Manual (Page 23)

Chapter 3
Controller logging
You use the controller logging feature to detect and log changes made to
Logix5000 controllers without adding any auditing software. With controller
logging, the controllers:
• Detect changes and create logs entries containing information about the
changes.
• Store the log entries to removable media for later review.
• Provide programmatic access to log entry counters to provide change
detection information remotely.
Note the following logging considerations:
• The 1769-L3x and 1769-L4x CompactLogix Controllers do not support
storing log entries to removable media, and the audit value is not populated.
• The Audit Value is not supported in versions 19 and earlier.
A controller log is a record of interactions that have occurred in the controller due
to physical conditions such as keyswitches, changes to removable media, fault
conditions, and programming changes configured in the application. Up to 100
log entries are buffered in the controller memory. The controller can save these
buffered entries to the removable media by using a message instruction.
Additionally, you can configure the controller to automatically write buffered
entries to the removable media after 80 entries have accumulated.
In the example table below, Record Numbers 4-6 are part of the Change
Detection feature. See Change detection on page 47 .
Record
Number Time Entry Description User Name Workstation
Name
FactoryTalk
ID Extended
Information Change Detection Audit
Value
1 12-Feb 03:39:34 Project download John Doe Laptop FT\JDoe Project L71 16#FD60_CB89_029F_3500
2 12-Feb 04:05:12 Forces Enabled Jones USMAYLT FT\Jones
3 12-Feb 04:22:03 Online edits modified
controller program John Doe Laptop FT\JDoe
4 12-Feb 04:42:12 Change Log entry added FT\JDoe 16#FD60_CB89_029F_3521
Introduction
Controller log
Rockwell Automation Publication 1756-PM015F-EN-P – October 2014 23