Rockwell Automation 1746-NR8 SLC 500 RTD/Resistance Input Module User Manual - Manual (Page 90)

Publication 1746-UM003A-EN-P
6-6 Module Diagnostics and Troubleshooting
Figure 6.2 Troubleshooting Flowchart
Check LEDs
on module.
Module Status
LED is off. Module Status
LED is on. Channel Status
LED(s) is
flashing. Channel Status
LED is off. Channel Status
LED is on.
Module fault
condition Normal module
operation
Fault
condition
Channel is not
enabled.
Channel is
enabled and
working properly.
Check to see
that module is
seated properly
in chassis.
Cycle power. Check channel
status word
bits 13 to 15
Enable channel if
desired by setting
channel config.
word (bit 11=1).
Retry.
End
End
End
Configuration error.
Check and correct the
configuration word for
this channel.
Out-of-range error
indicating that either an
over-range or under-range
condition exists. For all
over-range, the input signal
is greater than the high
scale limit for the channel.
For under-range, the input
signal is less than the low
scale limit for the channel.
Bit 15
set (1)
Bit 14
set (1)
Bit 13
set (1)
Yes
No
Yes
No
Contact your
local distributor
or Rockwell
Automation. Contact your
local distributor
or Rockwell
Automation.
Is problem
corrected?
Is problem
corrected?
A broken input error or
short-circuit (RTD)
condition is present. Check
channel for open or loose
connections (RTD and
potentiometer inputs) and
check channel for
short-circuit condition (RTD
only). Retry.