Bristol Standard Asynchronous Protocol
Encyclopedia
Bristol Standard Asynchronous/Synchronous Protocol (BSAP) is a industrial automation protocol developed by Bristol Babcock and managed by Emerson
. It is a master-slave protocol suited to both synchronous high speed local networks and asynchronous low speed wide area networks. BSAP also offers high message security for communication over phone lines and radio
networks by using effective error checking method (16 bit CRC-CCITT)and constantly exchanging the communication statistics. The polling scheme used by BSAP makes sure that each node in the network gets an equal priority for requests and responses. BSAP also provides mechanism of global addressing of all nodes connected for special messages like time synchronization apart from the normal individual addressing schemes. BSAP also supports Remote Database Access methods for reading and writing the memory in groups.It also supports multiple messaging schemes in which each node can transfer the node to other networks transparently and can transmit the responses in similar manner.
Emerson Electric Company
Emerson Electric Company is a major multinational corporation headquartered in Ferguson, Missouri, United States. This Fortune 500 company manufactures products and provides engineering services for a wide range of industrial, commercial, and consumer markets.Emerson is one of the largest...
. It is a master-slave protocol suited to both synchronous high speed local networks and asynchronous low speed wide area networks. BSAP also offers high message security for communication over phone lines and radio
networks by using effective error checking method (16 bit CRC-CCITT)and constantly exchanging the communication statistics. The polling scheme used by BSAP makes sure that each node in the network gets an equal priority for requests and responses. BSAP also provides mechanism of global addressing of all nodes connected for special messages like time synchronization apart from the normal individual addressing schemes. BSAP also supports Remote Database Access methods for reading and writing the memory in groups.It also supports multiple messaging schemes in which each node can transfer the node to other networks transparently and can transmit the responses in similar manner.
Protocol Layers
Protocol supports different layers including application, transport, network, link and physical with 1745 asynchronous character oriented mesasges, 2111 transparent messages & 2629 conversational mode messages. The physical layer support includes the following options.- RS232
- RS485
- Leased Phone Line
- Satellite
- Ethernet
- Cellular
See also
- Computer networkingComputer networkA computer network, often simply referred to as a network, is a collection of hardware components and computers interconnected by communication channels that allow sharing of resources and information....
- Computer scienceComputer scienceComputer science or computing science is the study of the theoretical foundations of information and computation and of practical techniques for their implementation and application in computer systems...
- ComputingComputingComputing is usually defined as the activity of using and improving computer hardware and software. It is the computer-specific part of information technology...