4.10.7.2 Redundancy Support in Frame Application

The DTMs able to handle slave redundancy can be used by any FDT Frame Application without need for specific redundancy support or knowledge. A FDT Frame Application may optionally implement the IDtmRedundancyEvents interface. Such a Frame Application is then able to display redundant slaves in it's topology view, e.g. a field device connected to two different lines or by using specific device icons within a topology treeview.

Within a Frame Application not implementing the IDtmRedundancyEvents interface a DTM representing a redundant slave can not be distinguished within the topology view. But the DTM and the parent component themselves typically display additional information, e.g. additional fieldbus addresses. Nevertheless within such a Frame Application these DTMs provide full functionality with regard to fieldbus redundancy.

As a redundant slave is represented by one DTM instance no additional functionality with regard to dataset synchronization or multiuser is required.