Establishing A Connection To The Opc Ua Server - Siemens SIRIUS PROFINET Manual

Functions
7.2 OPC UA server
7.2.6

Establishing a connection to the OPC UA server

An OPC UA client can access process values in the hierarchical namespace of the OPC UA
server.
To enable this, the OPC UA server and the OPC UA client authorize each other by
exchanging certificates. You can additionally encrypt the data traffic.
The OPC UA server classifies every certificate of an OPC UA client as "trustworthy" by
default.
Note
Configuring the connection on the client side
You can obtain information directly from the manufacturer of the software that is to access
the data of the OPC UA server in the 3RW44 PN via OPC UA.
Supported OPC UA services of the OPC UA server in 3RW44 PN
3RW44 PN supports the following OPC UA services:
● SecurityPolicy:
– None
– Basic128Rsa15
● MessageSecurityMode:
– None
– Sign&Encrypt.
Explanation of security settings:
The following table shows the security functions supported by the OPC UA server, which
have to be set in the connection configuration of the OPC UA client:
Security Policy
None
Basic128Rsa152
1) Exchange of certificates is deactivated
2) The data packets are exchanged unsecured between the client and server after the
certificate has been verified
3) The data packets are signed and encrypted with the certificates.
52
1)
2)
MessageSecurityMode
None
SignAndEncrypt
PROFINET Communication Module for SIRIUS Soft Starter 3RW44
Manual, 12/2013, A5E31996495002A/RS-AA/001
3)