24 Rockwell Automation Publication 1756-UM004A-EN-P - March 2019
Appendix A ControlLogix Network Device Status Indicators
Single-Port Module Status Indicators
Table 3 - Single-port Module Status Indicators
Status Indicator Description Status State
Module Status Display Alphanumeric display that scrolls messages. For example,
when a module is operating normally, the display scrolls
the module’s IP address.
——
Link Status (LINK) Indicates the current state of the module regarding
transmission of data on the EtherNet/IP™ network.
Off One of these conditions exists:
• The module is not powered.
– Verify that there is chassis power.
– Verify that the module is completely inserted
into the chassis and backplane.
– Make sure that the module has been
configured.
• No link exists on the port.
Flashing green Activity exists on the port.
Green The port is active, but not receiving traffic.
OK Status (OK) Indicates the current state of the module. For example, this
status indicator indicates if the module is executing
power-up testing, in the process of a firmware update or
operating normally.
Off The module is not powered.
• Verify that there is chassis power.
• Verify that the module is completely inserted into
the chassis and backplane.
• Make sure that the module has been configured.
Flashing green The module is not configured. The Module Status
display scrolls: BOOTP or
DHCP<Mac_address_of_module>
For example: BOOTP 00:0b:db:14:55:35
Configure the module.
Green The module is operating correctly. The IP address
scrolls across the Module Status display.
Flashing red The module detected a recoverable minor fault. Check
the module configuration. If necessary, reconfigure
the module.
Red The module detected an unrecoverable major fault.
Cycle power to the module. If this power cycle does not
clear the fault, replace the module.
Network Status (NET) Indicates if CIP™ connections are established. Off One of these conditions exists:
• The module is not powered.
– Verify that there is chassis power.
– Verify that the module is completely inserted
into the chassis and backplane.
– Make sure that the module has been
configured.
• The module is powered but does not have an IP
address. Assign an IP address to the module.
Flashing green The controller has an IP address and one of these
conditions exists:
• The module has not established any CIP
connections.
If connections are configured for this module,
check the connection originator for the connection
error code.
• All connections to the device have timed out or
been closed.
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