Rockwell-automation 1771-IFE , D17716.5.90 USER MNL. ANALOG INPUT Modu Manual de usuario descargar pdf (Pagina 46)

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Troubleshooting Your Input Module

Chapter 7

7-3

Table 7.A

Troubleshooting

Chart for Analog Input Module (1771IFE)

Indicators Probable Cause Recommended Action

RUN (green)

FLT (red)

Normal operation None

RUN (green)

FLT (red)

If outofrange bit is set (BTR word 1, bit

02) and all 8 underrange 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.

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

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