Publication 1734-UM001D-EN-P - April 2008
Troubleshoot with the Indicators 159
Indication Probable Cause Recommended Action
ControlNet A/B Status
Viewed Together (A and B)
Both Steady Off Reset, no power, or entire network interface deactivated. None or cycle power.
Alternating
red/green
Self test mode is present. None.
Alternating
red/Off
Incorrect configuration is present. Check network address and other ControlNet
configuration parameters.
Both Steady red Faulted unit is present. Cycle power or reset unit. If fault persists, contact
A-B representative or distributor.
Viewed Individually (A or B)
Steady Off Channel disabled. Program network for redundant media, if required.
Flashing
red/green
Incorrect network configuration is present. Cycle power or reset unit. If fault persists, contact
A-B representative or distributor.
Flashing red/Off • Media fault.
• No other nodes present on network.
• Check media for items such as broken cables,
loose connectors, and missing terminators.
• Add other nodes to the network.
Flashing
green/Off
• Temporary channel errors are present.
• Node is not configured to go on line.
Make sure the configuration manager node is
present and working and selected address is not
greater than selected UMAX.
(1)
Steady green Normal operation - MAC frames are being received without
detected errors.
None.
(1)
The configuration manager node is the node responsible for distributing ControlNet configuration data to all nodes on the network.
Indication Probable Cause Recommended Action
System Power
Off Not active - field power is off or dc-dc converter
problem.
1. Verify field power is on.
2. Verify backplane power (load current) is not exceeded.
3. Replace 1734-ACNR adapter.
Green System power is on, and dc-dc converter is active
(5V).
None.
Field Power
Off Not active - field power is off. Apply power to device.
Green Power is on - 24V is present. None.
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