When editing an FBD, a single dialog style is used both to instantiate (add new instances) of function blocks, resources, devices or adapters (plugs or sockets) to the FBD, and to edit existing instances. This is illustrated below for the case of an FB instance.

• A new instance is created by using the New item of the FBD's popup menu.
• Existing instances are edited by double-clicking on the instance name above the graphical block, or by selecting the Edit option from the pop-up menu associated with the instance name.
• When creating a new element, the Name field has the default value *Name*, which must be edited to a valid IEC 61131-3 identifier.
• You can select the desired type for the element from the Type drop-down list.
• If the type that you want to use does not appear in the list, you can add a new type by double-clicking on it in the file chooser.
• Pressing the OK button or pressing the Enter key when editing in a field will cause the dialog to attempt to close and save the current values for the edited element. If an error is found, the window will not close and an error message will appear in the status field below the title bar.
• Pressing the Cancel button will close the window and cancel any changes entered.

Last updated: 2009-05-11.
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