Siemens SIMATIC S7-1500 Function Manual page 105

Open User Communication
6.11 Secure Open User Communication
5. Create one of the instructions TSEND_C, TRCV_C or TCON in the program editor.
6. Interconnect the CONNECT parameter of one of the instructions TSEND_C, TRCV_C or
TCON with the tags of the data type TCON_IP_V4_SEC.
Settings at the TLS server
To set up a secure TCP connection in the TLS server, follow these steps:
1. Create a global data block in the project tree.
2. Define a tag of the data type TCON_IP_4_SEC in the global data block.
The example below shows the global data block "Data_block_1" in which the tag "SEC
connection 1 TLS-Server" of the data type TCON_IP_V4_SEC is defined.
The interface ID has the value of the HW identifier of the IE interface of the local CP (TLS
server).
Figure 6-24 IP_V4_SEC_Server
3. Set the connection parameters of the TCP connection in the "Start value" column. For
example, enter the IPv4 address of the TLS client for "RemoteAddress".
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Function Manual, 11/2019, A5E03735815-AH
Communication