The read produces the actual value of a hardware measurement. An example monitor point would return the reading from a module s temperature probe. Properties include real control points and monitor points . There is a consistent set of attributes and characteristics for all properties of the same type. Still other attributes and characteristics are associated with all property types, for example, all properties have a characteristic containing the property name.
Attributes are writable and readable.
Attributes are set to their default value upon Enable Device. Examples of characteristics are the property s default values, print format and human-readable descriptions. A device is purely a software concept used for control. It is a collection of properties . A device converts high-level commands into the many control point settings that the command requires to be executed.