Rockwell Automation 1746-NI8 SLC 500 Analog Input Modules User Manual - Manual (Page 64)

7–5 Module Diagnostics and Troubleshooting
Publication 1746Ć6.8 - April 1997
End
Check LEDs
on module.
Module Channel
blinking
Module fault
condition
Normal module
operation
Channel is
not enabled.
Channel enabled
and working
properly
Is problem
Check to see
that module is
seated properly
in chassis.
Cycle power.
corrected?
Contact your
local distributor
or
AllenĆBradley.
Yes
No
Check channel
status word
bits 12-15.
Bit 12
set (1)
Bit 13
set (1)
Bit 14
set (1)
Bit 15
set (1)
Troubleshooting Flowchart
Enable channel if
desired by setting
channel config.
word (bit 11 = 1).
Retry.
End
End
Fault
condition
UnderĆrange condition
exists. The input signal is
less than the low scale limit
for the channel.
Correct and retry.
OverĆrange condition exists.
The input signal is greater
than the upper scale limit for
the channel. Correct and
Retry.
An openĆcircuit condition is
present. Check channel and
wiring for open or loose
connections. Retry.
Is problem
corrected?
Contact your
local distributor
or
AllenĆBradley
No
Channel
Status LED
on.
Channel
Status LED
off.
Yes
Status LED off
Module
Status LED on Status LED(s)
Configuration error. Check
configuration word bits 3-5
for valid data format
configuration as well as
bits 6 and 7 for valid
configuration setting.
Retry.
Configuration error. Check
configuration word bits 3-5
for valid data format
configuration as well as
bits 6 and 7 for valid
configuration setting.
Retry.