6 OPC Robotics Information Model overview
The MotionDeviceSystemType as a subtype of the ComponentType (OPC UA for Devices) is used as the root object representing the motion device system with all its subcomponents, see Figure 10.

Figure 11 shows the main objects and the relations between them in an abstract view.
In Part 1 in general all variables and properties are read only unless stated otherwise in the description. A vendor can decide to provide variables or properties as writeable by client side as well.
