6.2 DeviceTopology Object
The Device Topology reflects the communication topology of the Devices. It includes Devices and the Networks. The entry point DeviceTopology is the starting point within the AddressSpace and is used to organize the communication Devices for the top-level Networks that provide access to all instances that constitute the Device Topology ((sub-)networks, devices and communication elements).
The DeviceTopology node is formally defined in Table 51.
| Attribute | Value | |||
| BrowseName | 1:DeviceTopology | |||
| References | NodeClass | BrowseName | DataType | TypeDefinition |
|---|---|---|---|---|
| OrganizedBy by the 0:Objects Folder defined in OPC 10000-5 | ||||
| 0:HasTypeDefinition | ObjectType | 0:BaseObjectType | Defined in OPC 10000-5. | |
| 0:HasProperty | Variable | 1:OnlineAccess | 0:Boolean | 0:PropertyType |
| Conformance Units | ||||
|---|---|---|---|---|
| DI DeviceTopology |
OnlineAccess provides a hint of whether the Server is currently able to communicate to Devices in the topology. “False” means that no communication is available.