Abstract
Most distributed process control systems have lacked an effective way to handle sophisticated interactive control applications. These systems have generally required implementation of interactive control in a minicomputer based host. With current electronics technology, a microprocessor based controller optimized for sophisticated control is feasible. Such a controller must provide multiple PID algorithms and numerous computing and logic functions. This paper presents a concept for such an interactive controllerThe Interactive Controller offers many of the capabilities commonly found in minicomputer based process control systems. It offers the control engineer prewritten software which includes a standard library of numerous sophisticated control functions. The Interactive Controller can be applied in a distributed control system using VDU's for operator interface or as a standalone unit with panel mounted stations. In either application the Interactive Controller offers minicomputer-like capability in a smaller package at a fraction of the cost of a typical minicomputer based process control system
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