Communication problem : Profibus

Hello,

I am using CPU 1500 and in Tia accessible network I can see all the networks which I am expecting but am not able to communicate with them as in the diagnostic buffer of slaves it says "Not reacheable"

What can be the possible issues?

I am using GSD files for CP cards to communicate with.

Closed cause question posted twice.

The second thread with the subject IO access errors is published within the conference Decentral Peripherie.