Rockwell Automation 1790D-NOV2/TNOV2 CompactBlock LDX Analog Modules - Manual (Page 60)

Publication 1790-UM001A-EN-P - March 2002
5-6 Module Diagnostics and Troubleshooting
Channel LED Indicator
Operation Individual channel LED indicator operation is shown in the following
tables.
Analog Input Modules
1790D-TN4V0 1790D-TN4C0
Status: Description: Status: Description:
Flashing
Green/Red Power up Flashing
Green/Red Power up
Off Off line Off Off line
Red On line and no field
power Red On line and no field
power
Red DeviceNet connection
and no field power Red DeviceNet connection
and no field power
Green Field power and open
wire
Flashing Red (1)
(1) Green for 0-20mA range.
Field power and open
wire (4-20mA range
only)
(2)
(2) Can be determined from the data table.
Green Field power and valid
input Green Field power and valid
input
Green Input over range Green Input over range
Green Input under range Flashing Red 1 Input under range
<3mA (4-20ma range
only)
2
Flashing Red Recoverable fault Flashing Red Recoverable fault