OPC UA communication
9.3 Using the S7-1500 as an OPC UA server
Communication
190 Function Manual, 11/2019, A5E03735815-AH
9.3.3.6 Generating server certificates with STEP 7
The description below shows the procedure for generating new certificates with STEP 7 and
applies in principle to various uses of the certificates. STEP 7 sets the appropriate purpose -
in this case "OPC UA Client & Server" - depending on which area of the CPU properties is
used to start the following dialog.
Recommendation: To use the full functionality for the security of the OPC UA server, use the
global security settings.
The global security settings are enabled in the CPU properties under "Protection & Security
> Certificate manager".
Customizing server certificates
STEP 7 automatically generates a certificate for the OPC UA server of the S7-1500 when
you activate the server (see "Activating the OPC UA server (Page 175)"). In the process
STEP 7 uses the default values for the parameters of the certificate. If you want to change
the parameters, follow these steps:
1. Click the Browse button under "General > OPC UA > Server > Security > Secure channel
> Server certificate" in the properties of the CPU. A dialog is displayed that shows the
certificates available locally.
2. Click the "Add" button.
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