A methodology for auto/manual logic in a computer controlled process

The usual methods of implementing the auto/manual logic in complex process oontrol systems hamper modularity and often lack a unified structure. In this paper we develop a language for describing the required logical procedures, based on the nature of the interdependencies which can exist between different control loops or functions in a system. A software structure is presented which implements the auto logic while retaining the autonomy and modularity of the control functions, and a simple example of its application is discussed.