Rockwell Automation 1756-RIO ControlLogix Remote I/O (RIO) Communication Interface Module Installation Instr - Manual (Page 19)

ControlLogix Remote I/O (RIO) Module 19
Rockwell Automation Publication 1756-IN610B-EN-P - November 2010
Module Status Indicators
The 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
This table shows status in order of priority, highest first.
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 one second after the error occurs.
One or more racks are in error.
Flashing red/off At least one rack that is 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.
44777
RIO CLX OK