Rockwell Automation 1771-IFE , D17716.5.90 USER MNL. ANALOG INPUT Module - Manual (Page 44)

Chapter
7
7-1
Troubleshooting Your Input Module
In this chapter, we describe how to troubleshoot your module by observing
the indicators and by monitoring status bits reported to the processor.
At power-up, the module momentarily turns on the red indicator as a lamp
test, then checks for:
correct RAM operation
firmware
errors
Thereafter, the module lights the green RUN indicator when operating
without fault, or lights the red FAULT indicator when it detects fault
conditions. The module also reports status and specific faults (if they
occur) in every transfer of data (BTR) to the PC processor. Monitor the
green and red indicators and status bits in word 1 of the BTR file when
troubleshooting your module.
Figure 7.1
Diagnostic Indicators
RUN
FLT
10528ĆI
ANALOG
IN
(12 BIT)
Diagnostic Bits Reported By the Analog Input Module
Diagnostic bits in the read block transfer status words provide diagnostic
capabilities.
Word 1 provides power-up and valid data status. Words 2, 3 and 4
provide channel data status.
If a module on-board self test fault occurs, block transfers will be
inhibited, the red fault (FLT) will light, and the green run (RUN) light will
go out.
Chapter Objective
Diagnostics Reported by the
Module