Profibus network with S7-1200, S7-300 and ET200S

Hello halker;

Your question raises an interesting problem.

One possible solution could be found in this FAQ,

What master/slave communication options are available on PROFIBUS DP?

One of the configurations discussed (4th before last in the list) shows how to connect 2 S7-300CPUs as master and slave, even though they are configured in different projects. This is a similar situation as you are descrbing.

That implies settng the slave configuration and data exchange in the slave CPU (your S7-300, programmed with Step 7 "classic"), downloading the configuration to the S7-300.

Then you would continue by importing a gsd for the S7-300 in the Profibus configurator of the master (your S7-1200, programmed with TIA portal, duplicating the previously configureddata exchanges for the slave in TIA Portal, and finally setting the master data exchange in the S7-1200

The steps are described in the specific FAQ for this application, id 19449428:

Master-slave connection between two CPUs in different projects

Hope this helps,

Daniel Chartier

Hi, 

i'm facing the same situation but with a S7-200 and a S7-1200.

Does it apply aswell?

Thanks a lot

albertllorach

Hi, 

i'm facing the same situation but with a S7-200 and a S7-1200.

Does it apply aswell?

Thanks a lot

Hi.

Please be very specific and tell us what is the "same".
From your words it seems as though you need to connect an S7-200 and S7-1200 via Profibus. This is not the same as the original question.

If I am right, then know that the S7-200 can't connect as a Master.

What are your thoughts?
w

LATE NOTE
Have a look at the posting on [LINK1] which links in turn to other links.
One of the broken links should show to [LINK2].
GSD files can be found at [LINK3] - where you can get the GSD for the  EM277 of the S7-200.