Rockwell Automation 1756-RMxx ControlLogix Enhanced Redundancy System User Manual - Manual (Page 203)

Rockwell Automation Publication 1756-UM535D-EN-P - November 2012 203
Troubleshoot a Redundant System Chapter 9
6. If necessary, reference these resources:
• Redundant Controller Major Fault Codes
• Logix5000 Controllers Major and Minor Faults programming manual,
publication 1756-PM014 (describes all major and minor fault codes)
Redundant Controller Major Fault Codes
The fault codes listed and described in this table are specific to redundant
controllers. For information about all controller major and minor fault codes, see
the Logix5000 Controllers Major and Minor Faults Programming Manual,
publication 1756-PM014 .
Table 38 - Redundant Controller Major Fault Codes
Type Code Cause Recovery Method
12 32 A disqualified secondary controller has had power cycled and
no partner chassis or controller was found upon powerup.
Verify that these conditions exist:
• A partner chassis is connected.
• Power is applied to both redundant chassis.
• Partnered controllers have the same:
– Catalog number
– Slot number
– Firmware revision
12 33 An unpartnered controller has been identified in in the new
primary chassis after a switchover.
Use either of these methods:
• Remove the unpartnered controller and troubleshoot the
cause of the switchover.
• Add a partner controller to the secondary chassis,
troubleshoot the cause of the switchover, and synchronize
the system.
12 34 Prior to switchover, a mode switch mismatch was present. The
old primary controller was in Program mode and its secondary
partner's mode switch was in the Run position.
Instead of the switchover transitioning the new primary
controller to go to Run mode, the new primary controller
transitions to a faulted state after the switchover.
Use either of these methods:
• Change the mode switches from Run mode to Program
mode and back to Run mode twice to clear the fault.
Make sure that the mode switch positions for both
controllers in a partnered set match.
• Use RSLogix 5000 to go online with the controllers. Then,
clear the faults and change the mode switch positions for
both the controllers in the partnered set to Run.