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Rockwell Automation Publication 1444-UM001D-EN-P - June 2018
Chapter 10
Operate the Module
Expansion Module Status Indicators
When the expansion module is inserted and powered, the power status
indicator shows green. The two remaining status indicators provide
information as to the status of the expansion bus and the module controller.
Normal expected status indicator states for these three status indicators with a
healthy system are:
• Power Status (PWR): Solid green
• Network Status (LNS): Solid green
• Processor Status (MS): Flashing green
As indication of controller faults or warnings: MS = Red - Flashing red for
fault, such as cannot read valid module type code, and solid red for self-check
failure.
Processor over temperature is treated as a critical self-check failure (solid red
indication). A fault is signaled for temperatures over 85 °C (185 °F). MS =
BLUE indicates a communication error, a warning status only. However, a
communication error can ultimately result in a critical link failure.
The expansion modules have a total of seven status indicators, comprised of a
group of three common (system) status indicators and a group of four, which
are module type specific. The behavior and indication that is provided by the
status indicators varies between module startup and operation.
Operating Status Indication
The following sections provide descriptions of the status indicators for each
expansion module.
Status Indicator
(Color)
Off
On
Blinking
Activity (amber)
No network activity
—
Network activity is present
Link (green)
No link is established
Link is established
—
IMPORTANT
Expansion modules are not considered part of status indicator requirements
set by ODVA for EtherNet/IP equipment.