Large Scale Distributed Control System (LSDCS) are usually created in a multi steps integration process because of their scale. It has to be governed to succeed by well defined information architecture, appropriate communication infrastructure and the supervisory of the time notion taken into consideration from the very beginning of the design state. Mutual influence of the architecture, underlying communication and systematic design methodology is proposed to greatly reduce the complexity. Functionality and scheduling algorithms are offered by these components to satisfy all the defined prerequisites of the real-time distributed control and design the robust systems in a systematic and uniform way.
A networked control system (NCS) defining characteristic is having one or more control loops closed via a serial communication channel. A distributed control system (DCS) means the feedback is provided from a supervisory control system to isolate parts of automation and all of them deal with the same real-time process.
The installation of LSDS appeared after microprocessor technology had started rocketing. It is no objection concerning possible improvements to the process management and safety. The main reason is the complexity of information architecture determined by time relations and a communication infrastructure. It is possible to reduce complexity and provide a systematic uniform design pattern using the proposed modified relation model where an additional component provide communication support for the implementation of association between system components.