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Split from how to communication with PROFINET S7-1200 with S7-300/400.

hi,

yes, it´s possible.

see this FAQ:

How do you configure and program an S7 connection and the FB15 "PUT" and FB14 "GET" function blocks for data transfer between an S7-1200 CPU and an S7-300 CPU?

hope this helps,

regards,

Hello,

Yes, you can do it in different way.

1) S7 communication : Using GET/PUT instruction either at S7300 or S71200 side.

2) Open User communication: TCON/TDISCON/TSEND/TRCV blocks

3) I device communication

In forum , you can find sample application  GET/PUT communication/I device communication.

https://support.industry.siemens.com/cs/ww/en/view/24352751

https://support.industry.siemens.com/cs/ww/en/view/38051505

Hello jhing,

If you do the PUT/GET solution, pay attention to the TSAP. (You will understand with the example provide by mopS04)

Best regards,

Hugo