APPLICATION OF SMALLTALK LANGUAGE FOR ACCELERATOR CONTROL

This paper describes the results of studies for object-oriented contro l system creation. Using VisualWorks environment based on Smalltalk we created a set of programs, such as Control Model Editor, Control Mode l Scanner and Control Views, for developing and running an object-orie nted model of an accelerator. Our system allows the user to easily cre ate a class library which can be used to develop a number of control p rograms. The object model defines the object under control, the contro l logic and graphics for displaying control objects' states. Our exper ience shows that object-oriented software development is faster compar ed with traditional languages, and provides more functionality. Visual Works is a multiplatform environment, and all applications can be port ed to different operating systems with only minor changes. VisualWorks also provides high performance, which is important for time-critical control applications.