vtripathi

Unable to read analog signal

3 posts in this topic

PLC:- FX3u-48MR

Analog card:- Fx2n 2AD

Signal source:- 4-20mA Signal generator

Tried

rd3A Command

Tried TO & FROM Command

PLC doesnot read the signal, yet no error, wired as per manual...

Please suggest if anyone has answer to this problem?

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@vtripathi How about your wiring and which module do you connect? Please show us your program for check.

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Hi Wasan

 

thanks for the reply 

 

i tried 2 different modules

 

Module 1:- FX3U-4AD-ADP, It is connected on left hand side of plc

 

This Analog module is connected to expansion board bolted to mitsubishi plc

 

Expansion board:- FX3U-CNV-BD

I am using a signal generator to generate 4-20mA signal

Wiring 

Connecting +Ve to V+

Bridging link between V+ and I+

Connecting Comm to -Ve

 

program attached

 

Second method was using FX2N 2AD, which connects on right hand side of the fx3u plc via ribbon cable, 

Please find screen shots of plc attached to word file as attachment

Hope to hear soon from you

Best Regards,

 

Vib

 

 

MITSUBISHIPLCANALOGPROGRAMMING.docx

MITSUBISHIPLCANALOGPROGRAMMING.docx

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