Allen-Bradley 193-DNENCAT, User Manual, Page: 88 / 112

88 Rockwell Automation Publication 193-UM014C-EN-P - August 2016
Chapter 10 Troubleshooting
Recoverable Error Mode
In this mode, the EtherNet/IP communication auxiliary module MS LED
flashes red. The device responds to messages that are specified in offline mode
recovery message protocol.
Unrecoverable Error Mode
In this mode, the EtherNet/IP communication auxiliary module MS LED
illuminates a solid red. The device continues in this state as long as the device is
powered.
Troubleshooting Procedures
The following table identifies possible causes and corrective actions when
troubleshooting EtherNet/IP related failures using the status LEDs.
Table 25 - Troubleshooting Procedures
Error Type Description LED State
Recoverable
Duplicate IP address detected.
Flashing Red
A device is not present on the DeviceNet scan list.
Error Type Description LED State
Unrecoverable
Power-up initialization failure.
Solid Red
Data communication error.
Status LED Color State Possible Cause Corrective Action
EtherNet/IP
Network Status
(NS)
None —
The EtherNet/IP communication
auxiliary module is not receiving
power.
Check the DeviceNet cable
connections and verify that 24V
DC exists between the red and
black terminals.
Green, Red,
Not Illuminated Flashing
(once)
Normal
This is a normal power-up
sequence.
Green Flashing
The EtherNet/IP communication
auxiliary module is online, but
with no connections established.
Check the EtherNet/IP master
and its scan list for correct
scanner configuration.
Green Solid
Normal operating state and the
EtherNet/IP communication
auxiliary module is allocated to a
master.
No action is required.
Red Flashing One or more EtherNet/IP
connections timed out.
Reset the EtherNet/IP master
device.
Red Solid
Diagnostics test failed on power-
up/reset. An internal fault exists.
Cycle power to the unit. If the
fault still exists, replace the unit.
Duplicate EtherNet/IP module
address exists. Two modules
cannot have the same address.
Change the IP address to a valid
setting and reset the device.
A fatal communication error
occurred.
Check Ethernet media for proper
installation.