Hello experts,

I'm planning to read/write data from my ET200SP controller (CPU1215-PN/DP) to my excitation controller DECS 250. They are connected physically through ethernet. I already configured both of them to have same subnet. 

But I don't know how to make them communicate to each other. DECS 250 supports MODBUS/TCP but not profinet. 

How can I make the two communicate? Please give me some guide on how to configure MODBUS/TCP communication with the controller as master and the DECS 250 as slave.

Thanks!