Siemens SIMATIC ET 200AL - End Points of the OPC UA Server

OPC UA communication
9.1 What you need to know about OPC UA
Communication
138 Function Manual, 12/2017, A5E03735815-AF
Additional information
More details on basic data type, array and structure mapping can be found in the OPC UA
Specification Part 6, "Mappings", see OPC UA BINARY.
9.1.8
End points of the OPC UA server
The end points of the OPC UA server define the security level for a connection. Depending
on the purpose of use or desired security level, you have to carry out the corresponding
settings for the connection at the end point.
Different security settings
Before establishing a secure connection, OPC UA clients ask the server with which security
settings connections are possible. The server returns a list with all the security settings
(endpoints) that the server offers.
Structure of end points
End points consist of the following components:
● Identifier for OPC: "opc.tcp"
● IP address: 192.168.178.151 (in the example)
● Port number for OPC UA: 4840 (standard port)
The port number can be configured, see "Settings of the OPC UA server (Page 164)".
● Security setting for messages (Message Security Mode): None, Sign, SignAndEncrypt.
● Encryption and hash procedures (Security Policy): None, Basic128Rsa15, Basic256,
Basic256Sha256 (in the example).