Rockwell Automation 1756-RMxx ControlLogix Enhanced Redundancy System User Manual - Manual (Page 233)

Rockwell Automation Publication 1756-UM535D-EN-P - November 2012 233
Status Indicators Appendix A
Chassis State Status Indicator
The Chassis State (PRI) status indicator identifies whether the chassis is primary.
The PRI status indicator on the primary redundancy module remains solid green,
and the PRI status indicator on the secondary redundancy module remains off.
Redundancy Module Fault Codes and Display Messages
Redundancy modules may experience any of these faults.
When the redundancy module experiences a fault, indication of that fault type is
presented in these methods:
• Event log
• Module Status Display
Event Log When Redundancy Module Experiences Fault
The redundancy module logs the fault type in its event log in NVS memory. You
access the event log through the RMCT to troubleshoot the fault yourself or with
assistance from Rockwell Automation Technical Support for troubleshooting the
fault.
Table 46 - Module Fault Codes
Fault Type Description
Minor Recoverable This fault type results in these conditions:
• The fault does not stop redundancy operations and provides you with a recovery
mechanism.
• The module may clear some minor recoverable faults on its own.
Minor Nonrecoverable This fault type results in these conditions:
• The fault does not stop redundancy operations.
• No recovery mechanism is available.
Major Recoverable The fault impacts redundancy operations, although the effect may not be immediate.
For example, if the fault occurred in the secondary redundancy module, the secondary
chassis will disqualify and will not be able to take over control if the primary
redundancy module fails
Major Nonrecoverable This fault type results in these conditions:
• This is a critical fault. Redundancy operations will cease.
• A switchover may occur.
• No recover mechanism is available.
• The module may need to be replaced.
IMPORTANT This section describes a subset of module fault codes you may see in the
event log or Module Status Display.
If you see a fault code not included in this chapter, contact Rockwell
Automation for assistance in troubleshooting that fault.