The Bacnet Device Manager provides a Who Has item (in toolbar or “Manager” menu if AX-3.5 or later) or a Who Has button at bottom of manager view, if AX-3.4 or earlier. When selected, this provides a popup dialog to set parameters for the BACnet Who-Has service. You can use this to locate objects by name or object ID (type and instance number). The default dialog is shown in Figure 17.

As in the device discover dialog, you can set device low and high limits, as well as select which BACnet networks (by number) receive the Who-Has broadcast (or all networks). When you click OK, a Bacnet Who Has job is started, and when the job completes the results (including “I-Have” responses) appear in another popup window, as shown in Figure 18.