Graphical and iconic programming languages for distributed process control: an object oriented approach

[Proceedings] 1988 IEEE Workshop on Visual Languages Pub Date : 1988-10-11 DOI:10.1109/WVL.1988.18027

S. Coote, J. Gallagher, J. Mariani, T. Rodden, A. Scott, D. Shepherd

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引用次数: 7

Abstract

Distributed process control has gained in impetus over recent years as an alternative to central control systems. The object-oriented paradigm lends itself well to the description of such distributed systems. The Oscar model of active objects embodies this paradigm, and a support environment for the design and implementation of process control systems built on this model is outlined. A graphical system description language based on an extended GRAFCET notation is described. This language is used to specify the interobject messaging and action required for a particular control task. The parsing of the diagram provides the code for controlling a system. A higher-level iconic approach to the description of control strategies is also described. By restricting themselves to the domain of process control, the authors have been able to make substantial progress in the provision of an integrated support environment. The environment incorporates the notions of visual programming techniques and combines iconic and object-oriented paradigms to produce a consistent interface metaphor.<>

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用于分布式过程控制的图形化和标志性编程语言:面向对象的方法

近年来，分布式过程控制作为中央控制系统的替代方案得到了广泛的应用。面向对象范式很适合描述这种分布式系统。活动对象的Oscar模型体现了这一范式，并概述了基于该模型的过程控制系统的设计和实现的支持环境。描述了一种基于扩展的GRAFCET符号的图形系统描述语言。这种语言用于指定特定控制任务所需的对象间消息传递和操作。图的解析提供了控制系统的代码。还描述了一种用于描述控制策略的高级图示方法。通过将自己限制在过程控制领域，作者已经能够在提供集成支持环境方面取得实质性进展。该环境结合了可视化编程技术的概念，并结合了标志性的和面向对象的范例，以产生一致的接口隐喻

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[Proceedings] 1988 IEEE Workshop on Visual Languages

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