Rockwell Automation Publication 1756-UM535D-EN-P - November 2012 229
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
(1)
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.
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