How to Read Data With OPC UA

OPC UA Client connection to OPC UA Server:

  • Select “Modules” category from menu.
  • Select “Driver” to connect OPC UA Server.

  • In “Drivers” page, click plus '+' button to add new driver.

  • Name: Write any name you like to describe connection, for example OPC_UA
  • Endpoint: This is the endpoint URL of OPC UA Server
  • Type: Choose OPC UA for connection type.
  • Driver Specific Options: After choosing OPC UA type for connection, set username and password. If Server accept anonymous connections delete username and password in curly braces

  • Then click “Save” button to establish connection.

  • To see connection established, select “Status” category from menu then click “Driver” option.
  • Driver name, last message and status are shown in this page, if connection is completed, green connected bar will be shown.

  • After connection established, tag must be added to driver. To do that:
    • Select “Modules” from menu, then click “Tag” option.
    • In “Tags” page, click plus “+“ button to add new tag.

  • “Details” page will be shown after clicked ”+” button.
  • In this page:
    • Name: Choose any name you like to describe tag.
    • Type: Choose proper type for data.
    • Address: Write tag address, this address is coming from OPC UA Server.
    • Address Prefix: You can write address prefix.
    • Conversion Script: In this area, you can do math operations with tag.
    • Driver Name: Choose correct Driver for Driver Name. In this example, OPC_UA

  • Click “Save” button to add tag.

  • After adding tag, to see connection established and coming data, select “Status” category from menu then click “Tag” option.
  • In this page: Name, Last Value, Last Message, Last Update Time and Status will be shown
  • If tag is added to driver successfully, green OK message will be appear under Status.
  • Last Value: Last data will be shown coming from connection.

TROUBLESHOOTING:

  • There is connection button to connect OPC UA Server, click this button

  • Write Endpoint URL and fill other necessary fields.

  • Click “Apply” button and confirm connection
  • If connection is successful, connection message will appear.