To promote interoperability of Clients and Servers, all instantiated Sercos devices shall be aggregated in an Object called “DeviceSet”. For composed Sercos devices (of various components that are also Sercos devices), every Sercos device shall be referenced from the DeviceSet Object. The standard entry point for OPC UA devices is defined in OPC UA for Devices Companion specification.
Figure 7 shows the AddressSpace organisation with OPC UA standard entry point for Sercos devices.
Figure 7 – Standard Entry Point for devices