Rockwell Automation 1756-RMxx ControlLogix Enhanced Redundancy System User Manual User Manual
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Rockwell Automation Publication 1756-UM535D-EN-P - November 2012
Chapter 9
Troubleshoot a Redundant System
5. Work back in time (up the lines of preceding events), to locate the point
that a switchover or disqualifying event occurred.
This is the end date and time of the event, and will be indicated on the
Event line in the A chassis event log, with a disqualification code that the
secondary has been disqualified, and a corresponding disqualification code
in the B chassis event log. Again, note that if no secondary is present, you
may not see any secondary disqualification codes in the event log at all. See
Possible Qualification Status Indicators on page 211
Preceding events that may indicate the
cause of the switchover.
Chassis A
PwDS and end date and end time in Chassis A.
This is the time the redundancy module
experienced a disqualifying event or switchover.
DSwP and matching end date and end time in
Chassis B. This is the time the redundancy
module experienced a disqualifying event or
switchover.
Chassis B
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