Hello,

I tried the same as well. But i am not able to get it.

I am using CPU 1212C AC/DC/RLY and SM 1231 AI

I have attached the screenshot of it. It saying module error, Supply voltage is missing, but i gave the connection.

and the LED in SM 1231 is always blinking in green.  Is it normal??

can you please help me to fgure out the problem?

Thanks in advance.

Regards

Srinivasan krishnan

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Split from connect the analog module SM 1231 AI 4 x 13 bit to plc s7-1200.

Hello,

please check the connnector of the AI that L+ and M are connected correctly on X10.

Regards

Christoph

there is no 24vdc on module.check the voltage.

and see unrtuction for conection of analog input

Hello sir,

I gave the voltage connections and checked with multimeter as well.

Further i followed these steps in this link too.

https://support.industry.siemens.com/cs/document/42781105/how-do-you-proceed-when-peripheral-device-errors-are-detected-by-the-s7-1200-?dti=0&lc=en-WW

 I have external encoder and i gave that power supply too.

But i am getting only that supply voltage missing error. I am totally confused where my problem is...

Is there error because of current??? have to measure current as well??

Thanks for the patience.

Regards

Srinivasan krishnan

hi,

how have you measured it?

Maybe it is connected wrong, inverted + and -

hope this helps,

regards,

New question published by eng.ahmedghozlan is split to a separate thread with the subject anolag card sm1231 Ai 16 bit give supply voltage is missing.

Best regards
Jen_Moderator