System Requirements

To make use of this feature, the following system requirements need to be matched.

  • KepServerEx V5 (or superior).
  • OPC UA Protocol


How to Use

The procedure for a successful OPC UA connection is divided into three main steps.

  • KepServerEx OPC UA Client Certification
  • Creating certificates for the OPC Server
  • Kepware OPC Client Configuration

KepServerEx Client Certificate

In the Kepware OPC UA Configuration Manager, navigate to Instance Certificates (1). In the Client Certificate portion, click on Export Client Driver Certificate (2), and save the file in any folder you want.


OPC UA Server Configuration

In your Engineering Environment, go to the Info > Settings tab, and look for the OPC Server Runtime configuration. Select OPC UA, and click on Settings (1).

You should see an application called UA Server Configuration Helper opening up. Click on Browse (2) and search for the file .. fs-9.1uaPLUS.Net4.exe. Then, click on Create UA Configuration (3) followed by Edit UA Configuration (4)


The Edit UA Configuration page is where the OPC UA Server properties are configured, such as Endpoint (1), Security Policies (2), and certifications (Client and Server) (3).


In the certificate popup, click on Import a Client Certificate (4) and browse for the Kepware Client Certificate. Then, Create a new self signed server certificate (5), give it a friendly name, and click on Create.

Finally, click on Export (6) to save the Server Certificate. Click on OK > Save And Close > Done


KepServerEx Configuration

In the KepServerEX Configuration display, right-click on Connectivity and select New Channel. From the Channel Wizard popup, browse for the OPC UA Client.


Fill in the Wizard configuration with the information from the OPC Server.


Click on Add Device (1) and give it a name. Fill in all the device parameters until you reach the Import Items (2) page.

The import tool WILL NOT work right now because the OPC Server (Project) is not running yet. Click on Advance (3) and finish your configuration.


Importing Server Certificate

Back in the OPC UA Configuration Manager, go to the Trusted Servers (1) tab and Import (2) the OPC Server certificate.


Reinitialize the Kepware service and Run your project.



Project Runtime

Once the configuration is done, you can launch the Project to test the communication exchange. Remember to have the OPC Server Module enabled on Run > Startup.


You can now go to your Kepware Device and Browse for the existing Tags.


The Tags Visibility property (in Edit > Objects) must be configured according to the description below:


  • Public: Can be read and write in your OPC
  • Protected: Can only be read
  • Private: will not be seen or browsed

In the Advosol UAplus Server popup, you can keep an eye on the Clients connected to your server. As shown in the image below, we have one client (Kepware’s OPC Quick Client) that is successfully communicating with our Project.


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