Allen-Bradley 1734-IM4 User Manual page 155

Indication Probable Cause
System Power
Off Not active; field power is off or DC-DC converter problem present. 1. Verify power is on, and apply power if needed.
Green System power is on; DC-DC converter is active (5V).
Field Power
Off Not active; field power is off.
Green Power is on; 24V is present.
Indication Probable Cause
Network Activity
Off No link established.
Flashing green/Off Transmit or receive activity present.
Steady green Link established.
Network Status
Off Device not initialized. The module does not have an IP address.
Flashing green No CIP connections present. Device has an IP address, but no CIP connections are
established.
Solid green CIP connections present. Device online and has an IP address, and CIP
connections are established.
Flashing red One or more CIP connections has timed-out.
Solid red Duplicate IP address detected.
Flashing red/green The module is performing a self-test (only occurs during power cycle test).
Rockwell Automation Publication 1734-UM001E-EN-P - July 2013
Troubleshoot with the Indicators
Recommended Action
2. Verify backplane power not exceeded, and correct, as
needed.
3. Replace 1734-AENT module.
None.
Apply field power.
None.
Recommended Action
Verify network cabling, and correct, as needed.
None.
None.
Apply power to device, verify IP address, and
correct, as needed.
None.
None.
Check for I/O module failure and controller
operation, and correct, as needed.
Verify IP address setting and correct, as needed.
None.
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