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7.2 DeviceTopology Object ToC Previous Next

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 organise 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 42.

Table 42 – DeviceTopology definition

Attribute Value
BrowseName DeviceTopology
   

OrganizedBy by the Objects Folder defined in OPC 10000-5

References NodeClass BrowseName DataType TypeDefinition
HasTypeDefinition ObjectType BaseObjectType Defined in OPC 10000-5.  
HasProperty Variable OnlineAccess Boolean PropertyType

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.

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