Rockwell Automation 1746-NT8 SLC 500 Thermocouple/mV Analog Input Module User Manual - Manual (Page 75)

Publication 1746-UM022B-EN-P - January 2005
Troubleshooting Your Module 6-3
LED Troubleshooting Tables
Module-status LED
If Module Status
LED is: Then: Take this Corrective Action:
On The module is
operating properly. No action required.
Off The module is
turned off, or it
detected a module
fault. Cycle power. If the condition persists, call
your local Allen-Bradley distributor for
assistance.
Flashing Jumper may be in
wrong position. Check jumper 1 position.
Module-status and Channel-status LED
If Module
Status
LED is: And Channel
Status LED
is: Then: Take this Corrective Action:
On
On The channel is enabled. No action required.
Flashing The module detected:
open-circuit condition,
under-range condition,
over-range condition. Examine error bits in status word
If bit 12=1, the input has an open
circuit
If bit 13=1, the input value is
under range
If bit 14=1, the input value is over
range
If bit 15=1, the channel has a
diagnostic channel error
Off The module is in power
up, or the channel is
disabled. No action is required.