FX3U (Made in China) Error LED when connect with FX2N-4AD

[Chungheng]

Hi, I need this help, I have a problem when connect my PLC FX3U (Made in China) with FX2N-4AD. When I connect the extension cable of FX2N-4AD to FX3U it turn off the RUN LED and ON Error LED.

But When I disconnect the FX2N-4AD from the PLC it operate normally. Does it because my FX3U made in China and my Fx2N-4AD made in Japan. I really appreciate your help.

Thank you

[Ron_S]

Connect and see what the error reports.

[Chungheng]

Yes I also Diagnose with the PLC and it show the error code is 6108. And I check on the Manual there is no 6108 error code. 

[GreenMan]

Hi

This error shows that there is something wrong between the PLC and the analog module. Check the connectors, if some small parts is stuck in it. Check also the total connection. If that do not work there is some thing wrong with one of the units. 

[Chungheng]

I already check the extension cable on PLC and FX2N-4AD there is nothing wrong.

[Ron_S]

The error number says there is.

Probably the Chinese plc is not compatible with the Japanese extension.

[Chungheng]

I think so, maybe the Chinese PLC is not compatible with Japanese Extension event with the same brand.

[Bryll]

Perhaps a stupid question, but do you have 24VDC supplied to your FX2N-4AD ?

[dantefo]

I had that problem too.

New version of FX3U PLC is not compatible with FX2N-4AD. You must use FX3U-4AD

I had to use an old FX3U PLC and it works (I didn't find FX3U-4AD at local market)

Use Melsec F series selection tool to find what modules can you use (the FX2N-4AD is not listed anymore )