P0926GH FOXBORO
describe
DCS is a multi-level computer system composed of process control level and process monitoring level, connected by a communication network. It integrates 4C technologies such as computer, communication, display, and control. Its basic idea is decentralized control, centralized operation, hierarchical management, flexible configuration, and convenient configuration. DCS has the following characteristics: (1) High reliability. Due to the decentralized implementation of system control functions on various computers, the system structure adopts fault-tolerant design, so the failure of a certain computer will not cause the loss of other system functions.
Due to the relatively single task undertaken by each computer in the system, specialized computers with specific structures and software can be used for the functions that need to be implemented, thereby improving the reliability of each computer in the system.
Open DCS adopts an open, standardized, modular, and serialized design. Each computer in the system communicates through a local area network to achieve information transmission. When it is necessary to change or expand system functions, the newly added computers can be easily connected to or removed from the system communication network, almost without affecting the work of other computers in the system.
Flexibility is achieved through configuration software to configure software and hardware based on different process application objects, including determining measurement and control signals and their interconnection relationships, selecting applicable control laws from the control algorithm library, and calling basic graphics from the graphics library to form various monitoring and alarm screens required, thus facilitating the formation of the required control system.
