Rockwell Automation 1756-RIO ControlLogix Remote I/O Communication Interface Module User Manual - Manual (Page 163)

Publication 1756-UM534B-EN-P - November 2010 163
Troubleshooting Display and Status Indicators Appendix D
Adapter Mode
In order of priority, highest first.
CLX Status Indicator – ControlBus Status
The CLX indicator displays the status of communication with the
ControlLogix processor.
Indicator Status Description
RIO Red A frame-receive error has been received in the last second
(CRC error, abort, or time-out). Indicator stays red for 1
second after the error occurs.
Flashing red/
off One or more racks are not being scanned.
Flashing green/
off Configuration mismatch on one or more racks.
Green All racks are being scanned and there are no configuration
mismatches.
Indicator Status Description
CLX Green The module has successfully processed a request from the
ControlBus backplane within the last five seconds. All
required connections are open.
Flashing green/
off Controlling Connection is open, but not all required
connections are open.
Yellow Idle, no requests received from the backplane in the last
five seconds. No connections; empty configuration.
Flashing yellow/
off Controlling Connection is not open.
Red The module has returned a CIP error to a request from the
backplane within the last second. All required connections
are open.
Flashing red/off The module has returned a CIP error within the last second.
All required connections are not open.