OPC UA Server Settings

The Global Parameters branch of the Server Configuration Tool includes an OPC UA Server & PCS Service section. The section includes OPC UA Server settings that control how Geo SCADA Expert handles OPC UA data.

Configure the following OPC UA Server settings:

• Enabled—Use to define whether the OPC UA Server is enabled.

  Select the check box to enable the OPC UA Server. Use the rest of the properties in this section to configure the OPC UA Server settings.

  Clear the check box to disable the OPC UA Server. This is the default setting. The rest of the properties in this section are 'grayed out' and unavailable for use.

• Port—Enter the port number for the OPC UA Server.
• Allow Anonymous Access—Use to define whether to allow Guest User access to the OPC UA Server. The Guest user has no authentication.

  Select the check box if Geo SCADA Expert is to allow Guest User access.

  Clear the check box if Geo SCADA Expert is not to allow Guest User access. This is the default option. Users have to log on with a valid Geo SCADA Expert User Account in order to access the OPC UA Server.

• Server Certificate—Use the Choose button next to the Server Certificate field to display a Select Certificate window. Use the window to view the details of the current certificate that is in use or to select a new certificate from the list of available certificates that Geo SCADA Expert is to trust.

  

  PCS creates a certificate at the time of installation and you should select this certificate unless you are providing your own certificate. The certificate that the PCS Server creates has a name that uses the following format:

  <Machine Name> ASB OPC UA Server

• Certificate Subject—Displays the entity authorized to use the certificate.
• Certificate Issuer—Displays the authority that has issued the certificate.
• Certificate Expiry—Displays the certificate's validity period.

  When you start the OPC UA Server, if the existing certificate has expired, Geo SCADA Expert prompts for a new certificate.