6 OPC UA for Cranes and Hoists Information Model overview
The CraneMotionDeviceSystemType is used as the root object representing the motion device system with all its subcomponents. The CraneMotionDeviceSystemType is derived from the MotionDeviceSystemType (OPC UA for Robotics) as a subtype of the ComponentType (OPC UA for Devices). For MachineryItemIdentification OPC UA for Machinery is applied, see Figure 8.

Figure 9 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.
