Allen-Bradley 1734-OB2, User Manual, Page: 154 / 221

Rockwell Automation Publication 1734-UM001E-EN-P - July 2013
156 Troubleshoot with the Indicators
1734-AENT EtherNet/IP Adapter
System Power
Field Power
43248
Module Status
Network Activity
Network Status
POINTBus Status
Module
Status
Network
Activity
Network
Status
1734-AENT
PointBus
Status
Field
Power
System
Power
0 2 0
Indication Probable Cause Recommended Action
Module Status
Off No power applied to device Apply power to the device.
Flashing red/green LED power cycle test (module self-test) present. None.
Solid green Device is operating normally. None.
Flashing red • Recoverable fault has occurred.
• Firmware (NVS) update present.
• Address switches changed.
1. Complete firmware update.
2. Verify address switches.
Solid red • Unrecoverable fault has occurred.
• Self-test failure present (checksum failure, or ramtest failure at power cycle).
• Firmware fatal error present.
Replace adapter.
Indication Probable Cause Recommended Action
POINTBus Status
Off Device not powered - check module status indicator. Apply power to device.
Flashing red/green LED power cycle test present. None.
Flashing red Recoverable fault occurred:
• At power cycle the number of expected modules does not equal
the number of modules present
• A module is missing
• Node fault (I/O connection timeout) occurred.
• Configure chassis size.
• Check for missing module and reinstall as needed.
• Check for I/O module failure and correct as needed.
Solid red Unrecoverable fault occurred - the adapter is bus off. 1. Cycle power to device.
2. If condition persists, replace device.
Flashing green Firmware (NVS) update in progress. None.
Solid green Adapter online with connections established (normal operation,
Run mode). None.