Hello! I have two ET200SP CPU 1510SP-1 PN with a CM DP module each.

I need to establish a communication between them by Profibus so that between them I can read and write data located in data blocks (DB's).

It is the first time that I use Profibus and I do not know what functions I have to use, I have tried with GET and PUT but it does not work.

Can someone help me? Thank you very much in advance.

PS: when defining one ET as a master and the other as a slave I get the error "The operating mode of the local interface does not support S7 connections, what do you mean?

Hello

here are the possibilities listed:

https://support.industry.siemens.com/cs/de/en/view/78028908

But if you use Put/Get then be sure that you have activated the PUt Get communication in the security settings of the PLC.

Bye Murof