Status indicators, Rio status indicator – remote devices status – Rockwell Automation 1756-RIO ControlLogix Remote I/O Communication Interface Module User Manual User Manual
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Publication 1756-UM534B-EN-P - November 2010
Appendix D Troubleshooting Display and Status Indicators
Status Indicators
The 1756-RIO module has three status indicators to indicate the state of
internal operations. The status indicators are labeled RIO, CLX, and OK.
RIO Status Indicator – Remote Devices Status
The RIO indicator displays the status of the Remote I/O network connection.
Status varies depending on the mode of the module.
Scanner Mode
In order of priority, highest first.
Module Display and Indicators
Indicator
Description
1
Module status display
2
RIO status indicator
3
CLX status indicator
4
OK status indicator
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.
One or more racks are in error.
Flashing red/
off
At least one rack being scanned (not inhibited) is in
error. One or more racks are inhibited.
Yellow
Idle, no racks are configured.
Flashing
yellow/off
All configured racks are inhibited.
Flashing green/
off
No racks being scanned (not inhibited) are in error, but
one or more racks are inhibited.
Green
Successful communication with all configured racks,
no inhibited racks.
RIO CLX OK
44777
ADAPTER MOD
1
2
3
4