Publication 1752-UM001A-EN-P - October 2006
138 Status Indicators
Network
Status (NS)
Off The controller is not online or may
not have power from the
DeviceNet network.
1. Cycle the DeviceNet power supply.
2. Check external wiring.
3. Take corrective actions for noise.
4. Contact Rockwell Automation.
Green, on The controller is online;
connections are established.
No action required.
Green,
flashing
The controller is online; no
connections are established.
No action required.
Red, on Communication failure due to
duplicate MAC ID (error code F0) or
Bus OFF (error code F1).
1. View the Alphanumeric display for the node address of the error and
error code.
2. Check that node addresses have not been duplicated.
3. Make sure the communication rate is the same for all nodes.
4. Check that cables are not loose, disconnected or too long.
5. Verify that terminating resistors have been installed only at both
ends of the main line.
6. Take corrective action for noise.
7. Make sure target devices are configured, verified, and in normal
operating state.
Red, flashing Communication timeout.
Red/Green
flashing
The Safety Network Number (SNN)
is being set.
No action required.
Lock
(Configuration
Lock)
Yellow, on A locked valid configuration exists. No action required.
Yellow,
flashing
An unlocked valid configuration
exists.
Lock the configuration before operating the safety system.
Off The configuration is invalid. Reconfigure the controller.
COMM (USB) Yellow,
flashing
The controller is communicating. No action required.
Off The controller is not
communicating.
No action required.
Inputs
0…15
Outputs
0…7
(I/O status)
Red, on A failure has been detected in the
input or output circuit or a
discrepancy error has occurred in
the I/O set for dual channel mode.
1. Check that the signal wire:
• is not contacting the power source (positive side).
• does not have an earth fault.
• is not disconnected.
2. Make sure there is not a short-circuit between signal wires.
3. Check that there is no overcurrent for the output.
4. Make sure there is no failure in the connected devices.
5. Verify that the Discrepancy Time settings are valid.
Red, flashing A failure has been detected in the
associated I/O circuit’s dual
channel configuration.
Off The input or output signal is off. 1. Check that the power supply voltage is set within the specified
range.
2. Make sure a cable or wire is not disconnected.
Yellow, on The input or output signal is on. No action required.
LED Indicator Descriptions
LED Indicator Color/
State
Description Recommended Action
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