Rockwell Automation 1771-IFE , D17716.5.90 USER MNL. ANALOG INPUT Module - Manual (Page 46)

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Troubleshooting Your Input Module
Chapter 7
7-3
Table 7.A
Troubleshooting Chart for Analog Input Module (1771ĆIFE)
Indicators Probable Cause Recommended Action
RUN (green)
FLT (red)
Normal operation None
RUN (green)
FLT (red)
If outĆofĆrange bit is set (BTR word 1, bit
02) and all 8 underĆrange bits are set
(BTR word 2, bits 00 through 07).
Return module for repair
If incorrect data in final storage word
locations in processor's data table,
possible severed or disconnected input
cable associated with the affected
channels.
Repair/replace cable.
or
Input module is conditioned for BCD
instead of binary or the reverse, incorrect
scaling, sign bits missing, wrong range.
Condition module for desired format
(BCD or binary), enter correct data and
initiate another write block transfer.
If module connections are intact and
configuration data is correct check
calibration procedure.
Hardware failure in module Return module for repair.
RUN Neither LED
FLT comes on
No power
PICO fuse is bad.
Turn off power. Remove and reinsert
module into chassis. Return power.
If problem still exists, and chassis power
supply is functioning properly, return the
module for repair.
In this chapter you learned how to interpret the indicator lights, and
troubleshoot your input module.
Chapter Summary