Hello everybody !

I have an old working STEP7 project with SINAMICS drives. They are controlled by SINAMICS CU320 modules (2pcs. 6SL3040-0MA00-0AA1). Before I did not have a deal with the STEP7 projects like this. Moreover, this project is without any comments.

The PLC SIMATIC S7-300 (CPU 315-2DP) has communication with those CU320 via the "Profibus" interface. The exchange takes place using the corresponding system SFB and DB data blocks.

I installed STARTER_V54_HF1 on my PC, and now I can see the CU320 modules in the Simatic Manager HW Configuration.

I am interested in what exactly the 315-2DP CPU places and stores in its DBs to exchange data with the CU320 (up to a word, byte, bit) ?

Maybe someone could share with a similar project (with comments in English) with the data exchange between the CPU 315-2DP and CU320 ?

Or at least where can I read about it (document, section) ?

Hello,

here you find some application examples:

https://support.industry.siemens.com/cs/ww/en/view/36813720

https://support.industry.siemens.com/cs/ww/en/view/67261457

Regards

Christoph