Hi

I used fb126 for profibus diagnostic in many projects. it was working perfect.

Yesterday i could not make it work. In this hardware there are 4 pieces IE/PB Link modules. can it be the reason why fb126 did not work?

In normal projects,my dp master system no was 1 ,2,3,4,5 max 6. this time ie pb link dp master no is 2980. and i cant reduce it.

do you have any idea why im having problem?

Hi,

do you use this Version of FB126?

https://support.industry.siemens.com/cs/de/en/view/98278878

There is PDF inside which tells you the compatibility to PLC.

If FB126 will not work with your Hardware, you could check this:

PROFINET IO – Diagnostics Processing in the User Program

https://support.industry.siemens.com/cs/de/en/view/24000238

Regards,

Towome