From OpenSCADAWiki
In the case of the successful exchanging with the physical controller, we obtain also the described data of the controller in the infrastructure of OpenSCADA — the data model. You can see these data in the "Attributes" tab of our parameters AT101_1 (Fig.4.1.8) and AT101_2. Due to the acquisition is done regularly and periodically per one second, then we can observe their change by clicking on the "Refresh current page" button in toolbar.