hi zolwik_rct,

what you need is Software-redundancy for S7-300/400. 

See the following manual for further information:

SIMATIC S7-300/S7-400 Software redundancy for SIMATIC S7

hope this helps,

 regards,

Thank's , but that is not what I need, see my attachment.

I have one network and one profibus port on each slave with one address. And your solution doesn't work as multimaster, 

anybody?

Hello,

don't think about functionality 2 masters on one segment. Maybe cut that 2 networks with coupler to 2 networks, but this must confirm other experienced guys, so wait for answers.

Thanks Duris, but coupler doesn't fit it.

Coupler can operate betweent two masters, not between slaves, i'm reading documentation, but if anybody done it, should be faster.

I know it's possible, but I don't know the way yet :)

Sry I understand that, but really can't imagine without coupler 2 masters on one segment, also without HW changes, but maybe answer someone.

Update: it can be shared that DP network with S7 communication, but you have ABB.

Thanks fritz,

that's is what i'm actually doing - i use sfc 12 and it's works. I can't use third party components in this project, despite that I know comsoft products and here it should work great.

I received an answer from siemens support, that I should do this in separete projects, then I will be able to use same slave with two masters.

You wrote I can read dp slave inputs, but it doesn't work for me - not every device support direct read from partner. I checked it for my ABB inverter

Thank you all for help.