The Property classes provide get() and, in case of writeable Properties, set() methods that can be used to directly access the value of the property [RD01 - 4.1.1 Direct value retrieval]. Both synchronous and asynchronous get() and set() methods are provided.
Value setting is normally done using set() property methods. These methods can be called by applications or by specifically designed GUIs. CORBA Dynamic Invocation Interface allows to write generic applications and GUIs (like the Object Explorer) that are capable of resolving dynamically at run time the structure of Distributed Objects and call set() methods to set the value of Properties [RD01 - 3.2.3. Value setting].
CAN properties will always access directly the hardware on the CAN bus at direct value retrieval and not use cached values.