64 Rockwell Automation Publication ENET-IN002H-EN-P - August 2017
Appendix A 1756 EtherNet/IP Status Indicators
Table 1 - 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 IP address of
the module.
——
Link Status (LINK) Indicates the current state of the module
about transmitting 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 inserted, snapped 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 Activity exists on the port.
OK Status (OK) Indicates the current state of the module.
For example, this status indicator indicates if
the module is executing power-up tests, 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 inserted, snapped 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 of the module
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 the 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 inserted, snapped 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.
• One or more connections have timed out. For example, an
HMI or I/O connection has timed out.
Re-establish the connection.
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