DeviceTopology 
Starting point of the configured device topology.
The representation of the DeviceTopology Object in the address space is shown in the following table:
| Name | Attribute |
|---|---|
| NodeId | ns=1;i=6094 |
| NamespaceUri | http://opcfoundation.org/UA/DI/ |
| BrowseName | DeviceTopology |
| NodeClass | Object |
| Categories | DI DeviceTopology |
The references from the DeviceTopology Object Node are shown in the following table:
| Reference | NodeClass | BrowseName | DataType | TypeDefinition | ModellingRule |
|---|---|---|---|---|---|
| HasProperty | Variable | OnlineAccess | Boolean | PropertyType | |
| HasTypeDefinition | ObjectType | BaseObjectType |