METHOD AND DEVICE FOR CHANGING OBJECTS IN A HUMAN-MACHINE INTERFACE DEVICE

摘要

When a programmer creates an object for use in a display screen of a human-machine interface device of a programmable system, at least some of the properties of the object are associated with a variable quantity. The programmer determines the property or properties for which the corresponding variable quantity is reasignable and which are fixed, by carrying out a setting operation, and creating an association record identifying which property or properties have a reassignable variable quantity. The object may then be stored in a library and transferred to the memory of the human-machine interface device. If a subsequent programmer wants to re-use the object by reassigning the variable quantity of one or more of the properties of the object, the association record is used to determine the property or properties for which the corresponding variable quantity is reassignable.