Dear experts,

I'm having 19 number of S7 315-2 PN/DP PLCs communicating in profinet connection and programmed in TIA PORTAL V13 SP2. Out of this, one is considered as master. Now i want to read some data from other 18 PLCs to the master PLC.
My plan is to use GET DATA block. But in all examples i found in internet for TIA portal, both PLCs are found in the same backup & they are adding the second CPU as a partner and establishes a S7 connection between them.

But in my case each PLC is having different backups. So, how can i add a cpu from a different backup as a partner? Can someone help me with the procedure.

Also i don't have any CP cards beside S7 300 plc. So, what is the maximum number of PLCs i can communicate with the master using GET data block. I have attached a photo below, does this mean i can use a maximum of 16 connections?

Konstantin_D

"Unspecified connection" is configured on only one side, you only need to know:
- IP - address of another controller
- DB address from which to collect data

All controllers have a limit on the number of connections. You can divide the task of collecting data between several controllers, and then transfer it to the main one.

 Thank you very much Konstantin_D.