Opc Ua Server - Siemens Simatic S7-1500 Function Manual

Restrictions

8.3 OPC UA server

8.3 OPC UA server
With OPC UA, data exchange is performed through an open, standardized and
manufacturer-independent communication protocol. The CPU acting as the OPC UA server
can communicate with OPC UA clients, for example, with HMI panels V14 and SCADA
systems.
For technical reasons, the security settings in PLCSIM Advanced differ from a hardware
CPU. Some features are disabled for simulations or are available to a limited extent.
Configuring OPC UA server
Start the instances via the communication interface "PLCSIM Virtual Ethernet Adapter"
(TCP/IP) to use the OPC UA server.
The OPC UA server functionality is not available if communication takes place via the
Softbus.
OPC UA security settings
Based on the OPC UA security settings, the same settings can be made in STEP 7 for the
hardware CPU. However, PLCSIM Advanced does not take these security settings into
consideration. This ensures that the user does not have his project change to perform a
simulation.
Certificate
Note
Server certificate
PLCSIM Advanced uses its own certificate in the firmware and not that of STEP 7. The
certificate need not be changed for simulations. However, it does not have the same security
level as a downloaded server certificate and cannot be used for secure connections!
● Server Security Endpoints
PLCSIM Advanced only supports Security Endpoint "none".
● Client certificate
PLCSIM Advanced does not evaluate certificates the imported and configured in STEP 7
. PLCSIM Advanced accepts all client certificates automatically. This setting cannot be
changed.
● User authentication
PLCSIM Advanced does not use the user name configured in STEP 7.
Only one logon is possible as "guest" or "anonymous".
User authorization for OPC UA
The PLCSIM Advanced license also contains the user authorization for OPC UA.
The user authorization applies for three instances.
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S7-PLCSIM Advanced
Function Manual, 12/2017, A5E37039512-AB