Rockwell Automation 1771-IL/B , D17716.5.91 ISOLATED ANALOG INPUT Module - Manual (Page 46)

Chapter
7
7-1
Troubleshooting
We describe how to troubleshoot your module by observing indicators and by
monitoring status bits reported to the processor.
At powerup, the module momentarily turns on both indicators as a lamp test,
then checks for
correct RAM operation
EPROM
operation
EEPROM operation
a valid write block transfer with configuration data
Thereafter, the module lights the green RUN indicator when operating without
fault, or lights the red FAULT indicator when it detects fault conditions. If the
red FAULT indicator is on, block transfers will be inhibited.
The module also reports status and specific faults (if they occur) in every
transfer of data to the programmable controller processor. Monitor the green
and red indicators and status bits in word 1 of the BTR file when
troubleshooting your module.
Figure 7.1
Module Indicators
RUN
FLT
10528-I
ISOLATED
ANALOG INPUT
Green RUN Indicator
Red FLT (fault) Indicator
Chapter Objective
Diagnostics Reported by the
Module