A series of computer-based devices that operate in conjunction with each other on a variety of applications. These are usually (widely) separated throughout the system being controlled.
Instrumentation system consisting of input/output devices, control devices and operator interface devices which in addition to executing the stated control functions also permits transmission of control, measurement, and operating information to and from multiple locations, connected by a communication link.
A system of dividing plant or process control into several areas of responsibility, each managed by its own controller, with the whole system connected to form a single entity, usually by means of communication buses.
Typically, a large-scale process control system characterized by a distributed network of processors and I/O subsystems that encompass the functions of control, user interface, data collection, and system management.
Distributed Control System (DCS) is a big Progammable Logic Controller (PLC) that is typically networked to other controllers, PLCs or field devices. It typically has a workstation to interface with the controller and can be very expensive due to built-in security and fail-over features.
A collection of nodes that interact to control a system whose components are spread out over some distance. Each node has intelligence for operating its own particular component of the system. Different parts of the system communicate status and control information with one another to form a distributed control system. Typically, they communicate on a peer-to-peer level. This is different from a type of system where all control and interaction between components is dictated by one central control. This is a common master/slave arrangement.
DCS is used in industrial applications to monitor and control distributed equipment with remote human intervention, for example a pulp mill.
A system which divides process control functions into specific areas interconnected by communications (normally data highways) to form a single entity. It is characterised by digital controllers and typically by central operation interfaces. Distributed control systems consist of subsystems that are functionally integrated but may be physically separated and remotely located from one another. Distributed control systems generally have at least one shared function within the system. This may be the controller, the communication link or the display device. All three of these functions may be shared. A system of dividing plant or process control into several areas of responsibility, each managed by its own Central Processing Unit, with the whole interconnected to for a single entity usually by communication buses of various kinds.
A real-time control system for continuous and batch process applications.
A decentralized control system using multiple processors that communicate over a network. Distributed control can be especially useful when the processes to be controlled are physically separated or require a great deal of processing power. The overall performance of a distributed control system depends on both individual devicesâ€(tm) performance and the interaction and communication between devices. Opto 22's SNAP PAC System is designed for distributed control. While controllers act as overseers, local I/O units with their own processors (called brains) handle many control functions independently. To improve performance, local I/O units and I/O points are not scanned continuously; instead, communication occurs only when data is needed.
A distributed control system (DCS) refers to a control system usually of a manufacturing system or process or any kind of dynamic system, in which the controller elements are not central in location (like the brain) but are distributed throughout the system with each component sub-system under the control of one or more controllers. The entire system may be networked for communication and monitoring.