3G5A2-RPT01-PE datasheet(106/182 Pages) OMRON

106 / 182 page

Input Units

Symptom

Cause

Remedy

Not all inputs turn ON or in-

(1) Power is not supplied to Input Unit.

Supply power

dicators are not lit.

(2) Supply voltage is low.

Adjust supply voltage to within rated range.

(3) Terminal block mounting screws are

loose.

Tighten screws.

(4) Faulty contact of terminal block con-

nector.

Replace terminal block connector.

Not all inputs turn ON (indi-

cator lit).

Input circuit is faulty.

Replace Unit.

Not all inputs turn OFF.

Input circuit is faulty.

Replace Unit.

Specific bit does not turn

(1) Input device is faulty.

Replace input devices.

ON.

(2) Input wiring disconnected.

Check input wiring

(3) Terminal block screws are loose.

Tighten screws

(4) Faulty terminal block connector con-

tact.

Replace terminal block connector.

(5) Too short ON time of external input.

Adjust input device

(6) Faulty input circuit

Replace Unit.

(7) Input bit number is used for output in-

struction.

Correct program.

Specific bit does not turn

OFF

(1) Input circuit is faulty.

Replace Unit.

OFF.

(2) Input bit number is used for output in-

struction.

Correct program.

Input irregularly turns ON/

OFF.

(1) External input voltage is low.

Adjust external input voltage to within rated

range.

(2) Malfunction due to noise.

Protective measures against noise, such

as:

(1) Install surge suppressor.

(2) Install insulation transformer.

(3) Install shielded cable.

(3) Terminal block screws are loose.

Tighten screws

(4) Faulty terminal block connector con-

tact.

Replace terminal block connector.

Error occurs in units of 8

(1) Common terminal screws are loose.

Tighten screws

points.

(2) Faulty terminal block connector con-

tact.

Replace terminal block connector.

(3) Faulty data bus

Replace Unit.

(4) Faulty CPU

Replace CPU.

Input indicator is not lit in

normal operation.

Faulty indicator

Replace Unit.

Error Processing and Correction

Section 5-3

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