• 27 Feb 2023
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Connecting to KEPServerEX from N3uron using OPC UA

This is a detailed step-by-step guide to connecting to KEPServerEX from N3uron using the OPC UA Client module.

  • Step 1: Create the module: (Config => Modules => Model => New Module

Figure - New module 

  • Step 2: Provide a name for the module (in this case OPCUAClient01), assign the module type (in this case OpcUaClient) and save the new configuration.

Figure 9- Configuring the new module as OPCUAClient

  • Step 3: Configure the Logger and API sections (usually the default values are sufficient). Save the configuration.

Figure - Logger(1)


  • Step 4: Create the connection to the OPC UA Server. Each connection requires an independent Client.

Figure - Client


  • Step 5: Configure the OPC UA Client to connect to the KEPServerEX. To do so, click on the OPC UA Server discovery button to the right of the Endpoint URL field and enter the corresponding endpoint of the server you want to connect to. The “Endpoint URL” is the Hostname/IP address of the target OPC server and the “port”, using the format opc.tcp://endpointURL:port. The default OPC UA port for the KEPServer is 49320

As shown below, once the endpoint has beenselected from the available options displayed in the OPC UA Server discovery interface, the Security mode and Security policy fields are automatically filled in.

Figure - Example discovery

Figure - OPC UA Discovery Browser Example

Figure - Example discovery 3.1

  • Step 6: Enable Authentication and fill in the User and Password, if your KEPServerEX requires it. Remember to save the configuration.Figure - Authentication

  • Step 7: Trust the KEPServerEX certificate in the Certificates section within N3uron, as well as the N3uron OPC UA Client certificate in the KEPServer OPC UA Configuration Manager.

Figure - Certificates x

Figura - Trust KEP

  • Step 8: Create a tag to connect to the OPC sever: Config => Tags => New Tag

Figure 13- New tag creation(1)


  • Step 9: Configure the tag. All details regarding communication should be configured in the Source entry. First, select the module from the drop-down menu in the Module name settings and then enter the name of the connection that was created in previous steps into the OPC UA Client field. Next, click on the OPC UA tag browser button and select your Node ID.

Figure - Example discovery tag

Figure - OPC UA Tag Browser 2

Figure - Example discovery tag 3

Save the tag configuration.

  • Step 10: The tag should now be available and displaying as good quality in the Real-Time display panel.

Figure - Example discovery tag 4

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