42 CompactLogix Packaged Controllers
Publication 1769-IN082A-EN-P - July 2008
Link Status (LNK) LED Indicator
The Link (LNK) status indicator is also located to the right of the Ethernet port,
below the NS indicator. It is also an EtherNet/IP network status indicator.
Use this table as a reference when interpreting your LNK indicator.
Status Description Take this action
Off The port is not connected to a powered Ethernet
device. Therefore, the port cannot communicate
on Ethernet.
Verify that all Ethernet cables are
connected.
Verify that Ethernet switch is powered.
Flashing green The port is performing its power-up self-test. Normal operation - no action is
required.
The port is communicating on Ethernet.
Steady green The port is connected to a powered Ethernet
device. Therefore, the port can communicate
on
Ethernet.
NS
LNK
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