Rockwell Automation Publication 750COM-UM009A-EN-P - May 2017 119
Troubleshooting Chapter 6
ENET Status Indicator
LNK1 Status Indicator
Table 19 - ENET Status Indicator Description
Status Cause Corrective Action
Off The interface is not powered, the interface is not properly connected
to the network, or the interface needs an IP Address.
• Apply power to the drive.
• Securely connect the interface to the network by using an
Ethernet cable.
• Set a unique IP Address by using the rotary switches, a BOOTP
server, a DHCP server, or by using interface parameters.
Flashes Red • The I/O connection has timed out.
• Explicit messaging control has timed out.
• The rotary switches have been changed since power up.
• The network configuration (IP Address, subnet mask, gateway
address) is invalid.
• Re-establish the I/O connection with the controller.
• Check the amount of traffic on the network.
• If the I/O connection is multicast, check the IGMP Snooping
settings on the Ethernet switch.
• Re-establish explicit messaging control with a network client (for
example, enable the Control Bar feature in CCW).
• Cycle power to recognize the new rotary switch settings.
• Write valid values to the interface [IP Addr Cfg x], [Subnet Cfg x],
and [Gateway Cfg x] parameters and cycle power.
Steady Red • Rotary switches are set to a reserved value (0, 255...998).
• A duplicate IP Address was detected.
• The DHCP lease has expired.
• Set the rotary switches to a non-reserved value (1 ... 254, 999).
• Configure the interface to use a unique IP Address and cycle
power.
• Configure the DHCP server to provide longer or infinite leases.
Flashes Green The interface is operating normally but the I/O connection is not
running and explicit messaging control is not active.
• Place the controller in RUN mode.
• Program the controller to recognize and transmit I/O to the
interface.
• Configure the interface for the program in the controller.
• Normal behavior if no I/O is being transferred.
Steady Green The interface is operating normally and the I/O connection is running
or explicit messaging control is active.
No action required.
Table 20 - LNK1 Status Indicator Descriptions
Status Cause Corrective Action
Off The interface is not properly connected to the network. Securely connect the interface to the network by using an Ethernet
cable. Also, make sure that the Ethernet cable is correctly connected
to the Ethernet connector.
Steady Green The ENET1 network port has a 100 Mbps network link, but no
activity.
No action required.
Flashes Green The ENET1 network port has a 100 Mbps network link with activity. No action required.
Steady Yellow The ENET1 network port has a 10 Mbps network link, but no activity. No action required.
Flashes Yellow The ENET1 network port has a 10 Mbps network link with activity. No action required.
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