Installation and Configuration

For installing and configuring the Open Automation Software Server, please refer to the product documentation. To configure a web page to communicate with the server, you must include:

  • jQuery v1.8.3 or later, found at and is also distributed with the OAS Web HMI product
  • The OAS Web HMI Script Library
  • The OAS Web HMI Stylesheet, which is used for styling modal dialogs and can be modified to fit your web design
  • A small block of Javascript containing an authentication token and URL location of the Open Automation Software Server – configuration options will be detailed below

NOTE: As of v2.6.0 of the Web HMI script library, object and attribute names have been changed to avoid confusion with OPC protocols and standards. The new object names are as follows:

  • OPC_config is now OAS_config
  • Top level OPC class used for calls such as OPC.authenticate is now OAS
  • Markup attributes are no longer prefixed opc-tag-, and are now oas-tag-.
  • Script libraries are backward-compatible, so existing code with “OPC” nomenclature will still function with no issues

To check your current script version, open an application using Web HMI in your browser, open a debug console and execute the command: OPC.version

The following is an example of a properly configured, minimal HTML page:

        <script type="text/javascript" src="js/jquery-1.8.3.min.js"></script>
        <script type="text/javascript" src="js/opc-lib-min.js"></script>
        <link rel="stylesheet" stype="text/css" href="css/opc-style.css"/>
        <script type="text/javascript">
            OAS_config = {
                serverURL: 'http://localhost:58725'
        Hello World

Of course, this example does not contain any bindings to OAS Server Tags, but contains all elements necessary to connect to a server located at http://localhost:58725 using an authentication token of7e61b230-481d-4551-b24b-ba9046e3d8f2.