Rockwell Automation 1757-ABRIO Process Remote I/O (RIO) Communication Interface Module - Manual (Page 135)

Publication 1757-UM007D-EN-P - December 2008 133
Appendix
B
Troubleshooting
Interpret the Status
Indicators The three status indicators on the module provide information about
your module and the status of communication with a host processor
and with the remote I/O network. The following tables outline the
indicator condition and the corresponding status for each indicator.
RIO Status Indicator – Remote Devices Status
The RIO indicator displays the status of the remote I/O network
connection.
SYS Status Indicator – ControlBus Status
The SYS indicator displays the status of communication with the
processor.
Indicator Status
Green Successful communication with all configured racks.
Yellow Idle, no racks are configured.
Red One or more configured racks is not responding or a protocol error has
occurred within the last second.
Indicator Status
Green The module has successfully processed a request from the ControlBus
backplane within the last five seconds.
Yellow Idle, no requests received from the backplane in the last five seconds.
Red The module has returned an error to a request from the backplane within
the last second.