Rockwell Automation Logix5000 Controllers Controller Information and Status Programming Manual - Manual (Page 47)

Chapter 4
Change detection
You can use the controller change detection feature as an additional means of
detecting changes made to Logix5000 controllers.
• A unique audit value is generated when a project is downloaded to the
controller.
• When a change is detected in the controller, a new audit value is generated.
• ChangesToDetect mask allows you to programmatically configure the
events to monitor for changes.
• Controller change detection is integrated into the Logix Designer
application.
Important: The change detection feature is not supported in version 19 or earlier.
Note the following considerations for change detection.
• Change detection is not available on the RSLogix Emulate 5000 Controller
and the SoftLogix5860 Controller, and the audit value is not populated.
• The 1769-L3x and 1769-L4x CompactLogix controllers do not support
storing log entries to removable media.
• Change detection is integrated in FactoryTalk AssetCentre version 4.1 and
later. FactoryTalk AssetCentre can be configured to detect changes in the
controller and read the controller's Controller Log.
• Change detection is not integrated with RSMACC utilities.
Two controller attributes support the Change Detection feature in version 20 and
later.
Attribute Name Description Access
AuditValue A unique value that is generated when a project is downloaded to the
controller or loaded from removable storage. When a change is detected this
value is updated.
To specify which changes are monitored, use the ChangesToDetect attribute.
GSV
Introduction
Controller change detection
Rockwell Automation Publication 1756-PM015F-EN-P – October 2014 47