Hi, I need read and write holding registers, by modbus tcp over profinet. I am using s7-1500 and can not find where i can put in connection parameters, such as IP address  and IP port. All instructions what I can find use TCON_IP_v4.
Please can you give me some sample how to read and write registers on 1500 CPU.

TIA Portal 15.0

Hello hrthrt;

The following documents describe how to configure the Modbus TCP functions on S7-1500 CPUs:

https://support.industry.siemens.com/cs/us/en/view/102020340

https://support.industry.siemens.com/cs/us/en/view/100633819

Hope this helps,

Daniel Chartier 

Hello hrthrt,

maybe is this document helpful

Modbus Communication with MB_Client and MB_Server

The connection parameters can you set at the DB - please look at the attachment.

The IP-address 0.0.0.0 means that a request can come from every IP..
The port is here described with 502.

Hope this is also helpful.

regards
CaOd