Rockwell Automation 1756-RMxx ControlLogix Enhanced Redundancy System User Manual - Manual (Page 232)

232 Rockwell Automation Publication 1756-UM535D-EN-P - November 2012
Appendix A Status Indicators
OK Status Indicators
The OK status indicator reveals the current redundancy module state.
Communication Status Indicator
The communication status indicator indicates activity on the redundancy
module communication between chassis in the redundant chassis pair.
Table 44 - OK Status Indicator
Indicator State Description
Off No power is applied to the redundancy module.
If necessary, apply power.
Solid red One of these conditions exists:
• The redundancy module is conducting a self-test during powerup.
No action necessary.
• The redundancy module has experienced a major fault.
Cycle power to clear the fault. If the major fault does not clear, replace the module.
Flashing red One of these conditions exists:
• The redundancy module is updating its firmware.
No action necessary.
• The redundancy module has been configured improperly.
Check the module configuration and correct any issues.
• The redundancy module has experienced a minor failure.
Cycle power to clear the fault. If the major fault does not clear, replace the module.
Solid green The redundancy module is operating normally. No action required.
Flashing green The redundancy module is operating normally but is not communicating with the
other redundancy module.
If necessary, establish communication with the other redundancy module.
Table 45 - Communication Status Indicator
Indicator State Description
Off One of these conditions exist:
• No power is currently applied to the module.
Apply power to the module.
• There is no communication between redundancy modules in the redundant chassis
pair.
Diagnose the redundancy configuration to determine why no communication is
taking place.
Red < 1 second The module has been started and has established partner communication.
No action required.
Solid red The module has experienced a critical communication failure.
Cycle power to clear the fault. If the major fault does not clear, replace the module.
Flashing green > 250 ms Communication activity is present.
No action required.