TheFileDevice’s only device extension, and most important child slot, is theFileHistoryDeviceExt (Histories), under which you add file import descriptors. The sole configuration property of importance is Base Ord, where you can select a specific local directory (use the drop-down control beside the folder icon, choose Directory Chooser). This configures relative file ord values in the File property of the history file import descriptors (under its child Histories extension). Otherwise, using the default null Base Ord, you specify absolute file ord values in the child descriptors.
Base Ord property. However, to impose some logical grouping, you can create multiple FileDevices, and use the Base Ord scheme (with different directory ords) to separate import descriptors by source. Unlike many field bus drivers, a FileNetwork contains no frozen LocalFileDevice. Its FileDevice named LocalFileDevice is a standard FileDevice component.