I have the same problem Connections with CPU 1512SP-1 PN via CP 1542SP-1 in TIA 15.1

I can't set up a connection with CPU 1512SP-1 PN via CP 1542SP-1. I chose different communication driver (S7-1200, S7-1500), but i don`t have connections. I used PC station in TIA 15.1 and TIA 17. HMI and PLC have in different project.

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Split from CP 1542SP-1 <-> HMI communication.

Hello Morgunov

so you HMI and you PLC are in different HMI projects?

In this case you could use the Proxy Data of your PLC to integrate a PLC Proxy device in the HMI project. then you can do an integrated connection and also you could browser the DBs of the PLC and do a symbolic addressing

(But your TIA Version of the HMI project has to be >= the Version of your PLC project)

Bye Murof