Allen-Bradley 1769-SDN, Installation Instructions Manual, Page: 60 / 68

60 Rockwell Automation Publication DNET-IN001B-EN-P - January 2012
Appendix B 1769 DeviceNet Modules Status Indicators and Data Structures
Table 13 - Network Status Indicator
Indicator Condition Description
Off One of these conditions exists:
• The scanner is not powered.
• The network is not powered.
• Communication is not occurring between the scannner and the
DeviceNet network. (This may be an acceptable condition.)
Complete these steps to change this state.
1. Verify that the scanner has power.
2. Check that the DeviceNet cable is securely connected and the
DeviceNet network is powered.
3. Verify that network power is adequate (11…25V DC).
Flashing green The scanner is fully operational, but there are no connections
established with any of the devices on the network.
If the scannner should be controlling DeviceNet slaves, configure its
scan list.
Solid green The scanner is fully operational and communicating with the
controller.
Flashing red One or more of the devices that the scanner is communicating with is
in a timed-out state.
Monitor the status display to determine which slave device is offline.
Solid red A critical network failure has occurred because a duplicate DeviceNet
node address has been detected.
Reset the scannner and change the node address of either the
scanner or that of the conflicting device. If the failure continues,
replace the scanner.