GE Web HMI allows you to write to tag values associated with an asset’s properties in the GE Web HMI Asset Model. It is possible to define a group of objects in a picture that can be selected at runtime, resulting in a control card appearing in which the operator can write to controllable properties of a given asset. This is accomplished with the IsSelectable property in the exported picture JSON file, which is only exported for iFIX Group objects that have Enable Select enabled in iFIX pictures as shown in the following graphic.
With traditional iFIX pictures, checking the Enable Select property allows an object to be selected in the Run-time environment.
With iFIX pictures that are intended for export to GE Web HMI, checking the Enable Select property of a group designates that group as a "click zone" in that picture. A click zone allows properties of a certain asset to be controlled or modified by writing to the associated iFIX tags. When you click on a selectable group that has an asset associated with it, a control card opens to show the current values for a specified set of properties for that asset. Both controllable and non-controllable properties display, based on the configuration of the properties. (Controllable properties are indicated with a gear icon.) Clicking on the control card changes it to Edit view. Edit view allows you to enter new values for those properties. The new values are written to the iFIX database tags when the Confirm button is selected.
For information on automatic click zone binding, refer to the Automatically Binding Child Assets to Click Zones using Group Names section.
NOTE: Use the Property Window to view and to edit the Enable Select property. For more information, refer to the Properties Window section in the Writing Scripts ebook.
