Open wire detection in Input Module Control logix

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Thread Starter

Faisal

I am trying to acquire voltages(1-5V) through input module controllogix. I wonder if input wire is open or fuse supplying power is blown off, there is any way to detect it (alarm, registers)?

Anyone familiar with "Wire-off condition" in control logix input module?

Thanks
 
I
Faisal,

What is your module catalog no ?

If you used Analog Input Module 1756-IF16, then when wire is open or power fuse to transmitter/sensor is blown, then UNDERRANGE flag of mentioned channel will be HIGH, indicated that that channel is in underrange status due to open wire or transmitter powered off.

For example, if I have 1756-IF16 installed on slot 7 of local chassis, UNDERRANGE flag will be :
Local:7:I.Ch4Underrange

Thanks and regards

Ikhtiander
 
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