Rockwell Automation 1756-RMxx ControlLogix Enhanced Redundancy System User Manual - Manual (Page 122)

122 Rockwell Automation Publication 1756-UM535D-EN-P - November 2012
Chapter 6 Configure the Redundancy Modules
Use this table to determine what an event classification indicates and if corrective
action is required.
Table 21 - Classification Types
Classification Type Description Action Required
Configuration A redundancy module configuration parameter has been changed.
For example, if you change the Auto-Synchronization parameter from
Always to Never, an event classified as Configuration is logged.
No corrective action is required.
This event is provided for informational purposes and does not indicate
serious anomaly with the redundancy system.
Command An event related to commands issued to the redundant system has
occurred.
For example, if you change the Redundancy Module Date and Time
parameters, a WCT time change event of the Command classification is
logged.
No corrective action is required.
This event is provided for informational purposes and does not indicate
serious anomaly with the redundancy system.
Failure A failure on the redundancy module has occurred.
For example, an internal Firmware error event classified as a Failure can
be indicated in the event log.
Action can be required to determine the cause of the failure.
If the failure is not followed by a Switchover or Major Fault event, then the
module could have corrected the error internally and additional action is
not required.
To determine if corrective action is required, double-click the event to see
Extended Event Information and the suggested recovery method, if
applicable.
Major Fault A major fault has occurred on one of the redundancy modules. Action can be required to determine the action needed to correct the fault.
Double-click the event to see Extended Event Information and the
suggested recovery method, if applicable.
Minor Fault A minor fault has occurred on one of the redundancy modules. No corrective action is required.
This event is provided for informational purposes and does not indicates
serious anomaly with the redundancy system.
Starts/Stops Various internal chassis and module processes have started or stopped. No corrective action is required.
However, if an event that is classified as a Failure, State Change, or Major
Fault occurs after the Starts/Stops event, view the Extended Event
Information of both events to determine if the events are related.
State Changes A chassis or module state change has occurred.
For example, if the chassis designation changes from being a
disqualified secondary to a qualified secondary, a State Change event is
logged.
No corrective action is required.
However, if an event that is classified as a Failure, or Major Fault occurs after
the State Changes event, view the Extended Event Information of both
events to determine if the events are related.
Switchover An event related to a chassis switchover has occurred.
For example, if an Initiate Switchover command is issued, an event
classified as Switchover is logged.
Action can be required to determine the cause of the switchover and
potential correction methods.
Double-click the event to see Extended Event Information and the
suggested recovery method, if applicable.
Synchronization An event related to chassis synchronization has occurred.
For example, if the Synchronization command has been issued, a
Network Transitioned to Attached event is logged and classified as
Synchronization.
No corrective action is required.
This event is provided for informational purposes and does not indicates
serious anomaly with the redundancy system.