Rockwell Automation 1790D-NOV2/TNOV2 CompactBlock LDX Analog Modules - Manual (Page 57)

Publication 1790-UM001A-EN-P - March 2002
Module Diagnostics and Troubleshooting 5-3
Module Operation vs.
Channel Operation The module performs operations at two levels:
•
module level - power-up, configuration, and communication
with a controller
•
channel level - data conversion and over- or under-range
detection
Internal diagnostics are performed at both levels of operation. When
detected, module error conditions are indicated by the module status
and individual channel LED lights.
Power-up Diagnostics Module Status
At module power-up, a series of internal diagnostic tests are
performed. These diagnostic tests must be successfully completed.
Table 5.1 shows module status LED indicator operation.
Network Status
The network status LED indicator shows the condition of the
DeviceNet connection. Table 5.2 shows network status LED
indicator operation.
Table 5.1
LED indicator: Status: Description:
Module status Solid red Unrecoverable fault in base unit
Flashing red Recoverable fault
Solid green Normal operation
Flashing green Stand by
Off No power
Table 5.2
LED indicator: Status: Description:
Network status Solid red Unrecoverable communication fault
Flashing red Recoverable communication fault
Solid green Communication path complete
Flashing green Communication path incomplete
Off Device is not online or not powered