Rockwell Automation Publication 5069-UM002A-EN-P - January 2019 287
Status Indicators Appendix A
EtherNet/IP Status Indicators
The EtherNet/IP indicators show the state of the controller Ethernet ports and
network communication activity.
NET A1, A2, and B1 Indicators
The NET A1, A2, and B1 indicators show the state of the EtherNet/IP ports
that are used for Logix control network connections.
LINK A1, A2, and B1 Indicators
The LINK A1, A2, and B1 indicators show the state of the EtherNet/IP links
with Logix control network connections.
Table 40 - NET A1, A2, and B1 Indicators
State Description
Off One of the following:
• The controller is not configured or does not have an IP address.
• The port is administratively disabled.
• The EtherNet/IP mode is Linear/DLR mode. The NET A1 indicator is on. The NET A2 indicator
is off.
IMPORTANT: The third bullet applies to only ports A1 and A2.
Flashing green The port has an IP address, but no active connections are established.
Steady green The port has an IP address and at least one established active connection.
Steady red Duplicate IP Address or invalid configuration.
Table 41 - LINK A1, A2, and B1 Indicators
State Description
Off The link is down. One or more of the following conditions exists:
• Ethernet cables are not properly connected at both ends. That is, the cables are not properly
connected the controller Ethernet port and to the connected device.
• No link exists on the port. For example, the connected device is not powered.
• The port is administratively disabled.
• LINK A2 only:
– The controller is the active ring supervisor in a DLR network, and the ring is not broken.
This is normal operation.
– The controller is the active ring supervisor in a DLR network and has detected a rapid
ring fault.
Flashing green The following conditions exist:
• The port is enabled.
• A link exists. That is, the cable is properly connected to an enabled controller Ethernet port
on to another device.
• There is activity on the port.
Steady green The following conditions exist:
• The port is enabled.
• A link exists. That is, the cable is properly connected to an enabled controller Ethernet port
on to another device.
• There is no activity on the port.
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