Abstract
Abstract Automation requires that the number of variables monitored and controlled in a process be increased. Distributed multivariable control allows the flexibility to configure schemes of control that is impossible with conventional analog and direct digital systems. Redundant architectures in the distributed device, the data highways and the operator console increases the reliability to the level that makes analog backup unnecessary. Microprocessor-based Distributed Control Systems or DCS's use structured or menu-driven firmware rather than software so that “bugs” in programs are non-existent. This study demonstrates that, besides handling process control, DCS's have the ability to simulate multivariable control. This can enhance more rapid implementation of new controls for greater productivity. Increasing the number of monitored and controlled points increases the attractiveness of DCS's.
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