OPC UA Server Real Time DB Settings

As regards to the Real Time DB, the OPC UA server can be enabled and specified with which variables, from those defined in the project, can be displayed in it's address space.

The settings for the server are found in the Real Time DB's OPC Server group.

OPC Server UA

Enables/Disables the UA server.

OPC UA Server Access Level

Represents a user level.  When set at a level  different to 0, the client who connects in order to access the address space must specify the credentials (username and password) of a project  user possessing a level equal to or higher than the one set. The 0 level consents anonymous access.

OPC UA Server Name

This is the String that represents the name with which the Server is visible to the Clients who want to connect. The ‘Movicon@[NodeName]’ default value contains the alias [NodeName], which the SDK substitutes with the ebay computer name on which the server is running on (e.g. ‘Movicon@StefanoG’).

Manufacturer Name

Represents the name of the Server manufacturer that is shown to Clients together with other Server information.  Along with this piece of information other information can be set such as the ‘Product Name’ and ‘Product Uri’, which will be published by the server as additional information.

Endpoint List

This shows the list of Endpoints that the Server has.  This is a description of the connection and transport mode of the information which the Server makes available to Clients who want to connect.  The strings on the list have the following format: [transport]://[server name]:[port]

Eg. Opc.tcp://[NodeName]:63840 in which the transport is 'opc.tcp' type, the Server name is the alias [NodeName] which will be substituted with the name of the computer.  63840 is the  TCP port used to connect to the server.

Security Settings

OPC UA Clients can choose to establish a secure connection in respect to the modalities provided and exposed by the Movicon OPC UA Server.  The Connection Security Modalities are defined in the file located in the  "ServerConfig.xml" project folder under the <SecuritySetting> section in the <UaEndPoint> node. Modes provided for default are: "None", "SignAndEncrypt" and "Sign".

Certificates

To create a Runtime connection between the Movicon OPC UA Server and OPC UA Client, the Client  may be required to ask for a Server certificate in order to be inserted among those classified as Trusted.

The Movicon OPC UA Server generated its certificates based on the setting reported in the "ServerConfig.xml" configuration file in nodes:

"ServerCertificate" and "ServerPrivateKey":

The "MoviconUAServer.der" certificart is saved for example in:

"C:\ProgramData\OPC Foundation\CertificateStores\MachineDefault\certs\";

whle the "MoviconUAServer.pem" certificate is saved for example in:

"C:\ProgramData\OPC Foundation\CertificateStores\MachineDefault\private\".

The  Movicon OPC UA  Server will then consider the certificates of others classified as trusted once inserted in the path indicated by the  "CertificateTrustListLocation" attribute has the default value:

"C:\ProgramData\OPC Foundation\CertificateStores\UA Applications\certs\" .

The OPC UA Server Certificates are automatically created by Visu + when the project is started in runtime if they are not already present. In the case of Windows CE, the Client and Server certificates are created when the Runtime is first started and the path where the "MoviconUaServer.der" certificate file is saved is relative to the project folder: [projectpath]\MachineDefault\certs\.