Vijaya - please take a look here: vcampus.osisoft.com/.../querystring-fun.aspx
and the release notes:
PI WebParts v3.0 includes comprehensive support for URL query string parameters. Any property in a web part toolpane that can receive its value from a web part connection can now also receive its initial value (when the page is first loaded) from a user-defined URL query string parameter. Note that values provided from other web parts will override the URL query string value
Thanks a lot Andreas. We will try this.