OPC UA communication
9.3 Using the S7-1500 as an OPC UA server
Communication
Function Manual, 11/2019, A5E03735815-AH
179
Activating the standard SIMATIC Server interface
If the "Enable standard SIMATIC server interface" option is selected, the OPC UA server of
the CPU provides the enabled PLC tags and server methods to the clients, as was specified
by SIEMENS in the self-defined namespace.
This option is selected in the default setting.
Leave the option selected so that OPC UA clients can automatically connect to the OPC UA
server of the CPU and exchange data.
If you do not select this option, you must add the server interface by entering the "OPC UA
communication" entry in the project tree. This interface is then used as OPC UA server
interface, see OPC UA server interface configuration (Page 199).
Note
General device information is readable even with deactivated standard SIMATIC server
interface
Even if you disable the standard SIMATIC server interface, OPC UA clients can read general
device information about the OPC UA server of the CPU.
Examples of such device info
rmation: DeviceManual, DeviceRevision, OrderNumber. In this
case, however, all objects of the applicati
on program remain invisible to clients.
If you want to prevent that this device information is not visible, you have to disable the OPC
UA server of the
CPU.
9.3.3.3 General settings of the OPC UA server
TCP port for OPC UA
By default, OPC UA uses TCP port 4840. You can, however, select a different port. Entries
from 1024 to 49151 are possible. You must, however, make sure that there are no conflicts
with other applications. OPC UA clients must use the selected port when establishing a
connection.
In the example below, port 48400 is selected:
Figure 9-16 TCP port for OPC UA
An overview of the supported protocols and the port numbers used by the S7-1500 CPUs
can be found in section Communications protocols and port numbers used for Ethernet
communication (Page 22).
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