Can I send some basic on/off stuff from Logo 8 to Logo 7 through network? I found a way to share that information between Logo 8 devices, but not yet from Logo 8 to Logo 7.

This system is for controlling our house lights, and I'll have a master off button. I'd like to save the inputs of Logo 7, so that's why I would like to connect this momentary button to only one Logo 8, and distribute the reset signal via network to other Logo 8 + this lonely Logo 7.

All devices will be connected to the same network, so that's not a problem.

Yes, that is possible. However, not as easy as between two 0BA8. Do you want to send only bits of the 0BA8 to 0BA7 or vice versa?
Tell us how many bits you want to send from where to where and I'll make you an example ready.

I think that 2 bits from Logo 8 to 7 is enough for now. Basically those will be 'reset' and 'enable' bits. I need 1 bit, but 2 would be really nice. And at least for now there is no need to send anything from 7 to 8.