Rockwell Automation Publication 1756-UM004C-EN-P - June 2021 49
Appendix A ControlLogix Network Device Status Indicators
Dual-Port Module Status Indicators
Table 8 - Dual-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.
——
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 Module Status display
scrolls: OK <IP_address_of_this_module>
For example: OK 10.88.60.160
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.
Both of these conditions
exist:
• Status Indicator is Red
• Module Status Display
is scrolling: Image
Update Needed
The module’s main firmware image must be updated. Follow these
steps:
1. Update the firmware image.
2. Cycle power to the module.
Flashing red and green The module is performing its power-up testing.
Network Status (NET)
Indicates if CIP connections are established.
IMPORTANT: The new-series 1756-EN2TR and
1756-EN3TR modules have a NET status indicator.
The older-series 1756-EN2TR and 1756-EN3TR modules
do not have a NET status indicator.
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.
Green
The module has established at least 1 CIP connection and is
operating properly. The IP address scrolls across the Module
Status display.
Red
The module is in conflict mode. It shares an IP address with
another device on the network. The module’s current IP address
scrolls across the Module Status display. The display scrolls: OK
<IP_address_of_this_module> Duplicate IP
<Mac_address_of_duplicate_node_detected>
For example: OK 10.88.60.196 Duplicate IP - 00:00:BC:02:34:B4
Change the module’s IP address.
Flashing green/flashing
red
The module is performing its power-up testing.
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