The Device Topologyreflects the communication topology of the Devices. It includes Devicesand the Networks. The entry point DeviceTopologyis the starting point within the AddressSpaceand is used to organize the communication Devicesfor the top-level Networksthat provide access to all instances that constitute the Device Topology((sub-)networks, devices and communication elements).

The DeviceTopologynode is formally defined in Table 45.

Table 45– DeviceTopology definition

Attribute

Value

BrowseName

DeviceTopology

References

NodeClass

BrowseName

DataType

TypeDefinition

OrganizedBy by the 0:Objects Folder defined in OPC 10000-5

0:HasTypeDefinition

ObjectType

BaseObjectType

Defined in OPC 10000-5.

0:HasProperty

Variable

OnlineAccess

0:Boolean

0:PropertyType

Conformance Units

DI DeviceTopology

OnlineAccessprovides a hint of whether the Serveris currently able to communicate to Devicesin the topology. “False” means that no communication is available.