Ok status indicators, Table 41 - ok status indicator, Ch1 and ch2 status indicators – Rockwell Automation 1756-RMxx ControlLogix Enhanced Redundancy System User Manual User Manual
Page 229: Table 42 - ch1 and ch2 status indicators

Rockwell Automation Publication 1756-UM535D-EN-P - November 2012
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Status Indicators
Appendix A
OK Status Indicators
The OK status indicator reveals the current redundancy module state.
CH1 and CH2 Status Indicators
The CH1 and CH2 status indicators reveal the following module states.
Table 42 - CH1 and CH2 Status Indicators
Table 41 - 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 shutdown 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 major fault that may be cleared
remotely using the RMCT.
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 modules in the same chassis.
If necessary, establish communication with the other redundancy module.
Indicator State
Description
Off
One of these conditions exists:
• No power
• RM major fault
• NVS update
Solid red
One of these conditions exists:
• No transceiver plugged in
• Faulted or failed transceiver detected
• Transceiver with incorrect or vendor ID detected
Intermittent red
For 1 s, then off, indicates powerup.
Flashing red
One of these conditions exists:
• Redundant channel error
• No cable connection
Intermittent green
(1)
On for 256 ms for each packet received, then off. Active operating channel. (Channel
used for data communication between the partner 1756-RM2/A modules.)
Flashing green
Indicates that this channel is operating as the back-up channel and is ready to
become the Active channel if the current Active channel fails.
Unknown
Operating state is not yet determined.
Active
Channel is operating normally as the active channel.