Allen-Bradley 1734-IM4 User Manual page 153

Indication Probable Cause
Flashing red 1 Hz - Check_Configuration telegram rejected.
Max number of POINT I/O modules in master configuration
overridden.
2 Hz - SetPrm telegram rejected.
The first byte in user parameter data does not equal zero. Max
number of user parameter bytes overridden.
Indication Probable Cause
POINTBus Status
Off • No power supplied.
• Hardware check is in progress.
• Initialization is in progress.
Solid green Normal operation present.
Flashing red 1 Hz - Incorrect POINT I/O module installed.
POINT I/O module removed from backplane.
Solid red Critical link failure (BUS_OFF) is present.
Indicator Indication
System Power Off
Green
Field Power Off
Green
Probable Cause
System power not applied.
System power (5V) present
Field power not applied.
Field power (24V) applied.
Rockwell Automation Publication 1734-UM001E-EN-P - July 2013
Troubleshoot with the Indicators
Recommended Action
Check configuration.
Recommended Action
Apply power.
None.
Verify module installation, no modules removed, and correct,
as needed.
Check network cabling, and correct, as needed.
Recommended Action
1. Verify field power is on.
2. Verify backplane power (load current) is not exceeded.
3. Replace 1734-APB adapter.
None.
Apply field power (24V).
None.
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