User Manual Manual

121Publication 1769-UM009E-EN-P - August 2009 121
Chapter 8
Troubleshooting
Introduction
The 1769-SDN scanner module’s front panel status indicators aid in
troubleshooting the module. The diagnostics provided by these indicators are
described in this chapter.
Status Indicators
The first step in troubleshooting is to observe the 1769-SDN scanner module’s
status indicators and seven-segment numeric displays. The indicators function
as follows:
• The bi-color (green/red) Module status indicator shows whether the
scanner module has power and is functioning properly.
• The bi-color (green/red) Network status indicator provides information
about the DeviceNet channel communication link.
• The numeric display shows node address and status display information.
Status information precedes the node address.
Topic Page
Status Indicators 121
Error Codes 124