Connect the OPC UA HDA Server and the OPC UA HDA Client

Before you begin

To establish a connection between the OPC UA HDA server and an OPC UA client:

This topic describes how to perform these steps.

Start the OPC UA HDA server. To do so, run the Historian OPC UA HDA Server service.
Access the OPC UA client application, and create a connection with the endpoint URL that you provided while configuring the OPC UA HDA server settings.
Select the security settings that you want to use for the OPC UA client.
The OPC UA HDA server sends the server certificate to the OPC UA client. A message appears, asking you to accept the server certificate.
Accept the server certificate.
The OPC UA client sends a certificate to the OPC UA HDA server. However, an error message appears, stating that verifying the certificate has failed. This happens because, by default, the client certificate is rejected.
Accept the client certificate:
1. In the Proficy Historian OPC UA Server Configuration widow, select Trust List.
  The client certificate appears. A icon appears next to the certificate, indicating that it is rejected.
2. Select the row containing the client certificate, and then select Trust Certificate.
  A message appears, asking you to confirm that you want to trust the client certificate.
3. Select Yes.
  A icon appears next to the certificate, indicating that it is trusted.
Access the OPC UA HDA client, and process the connection that you have created.
A message appears, asking you to accept the server certificate.
Accept the server certificate.
Connection between the OPC UA HDA server and the OPC UA HDA client is established.