jurizato

How to read serial or lot number from a NJ CPU

4 posts in this topic

Dear All, I'm trying to find a way to read the serial number or the lot number of a NJ301 CPU. The idea is read some identifier number and put in my program in order to identify whether the CPU is the original CPU. I already look and try some System Variables, but the more near was the _UnitVersion, but this number is related to thousands and thousands CPUs.

Case I could read this kind of identifier, I could use some comparator and turn on some boolean to advert "No correct or original CPU".

Some think like this.

I thank in advance.

Edited by jurizato

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How about the MAC address instead of the serial#?

It may be read via CIP message.

Edited by Sergei Troizky

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Dear Sergei, many thanks for your reply.

It is an idea..... Do you know if the MAC address of the NJ CPUs are diferents? In oder words, if I buy two NJ301 CPUs, each one will receive differents MAC Address?

If yes, read the MAC instead of the serial can solve my problem!

Sergei, do you have any examples using CIP message to read the MAC? Could you share somethink?

Thank you so much.

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Every unit MAC address is unique by definition.

Unfortunately, no example. Do not work with NJ presently and never tried to read the MAC address in the past.

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