| 摘要 |
FIELD: information technology.SUBSTANCE: method of information exchange in the telemechanics system is provided, in which any information message is framed by signs of its beginning and end, and between them there are fields of codes of address, control and information forming the transmitted polynom, and protective control code sequence, to avoid the appearance of a false code "flag" the signal "0" is inserted in the transmitted message after the transfer of five consecutive signals "1", the "1" signal at high order of the first byte of the address code is a sign of the use of two-byte address, and the signal "0" is the sign of single-byte address structure. Information message is preceded by the transmission of sync byte "meander" of alternating signals "1" and "0", the control station periodically transmits the message to the communication channel - the centralised polling of readiness to transmit information of all controlled points, the code is entered to the address field of the message of the centralised polling, that is different from the code of addressing of the controlled point, and the information field is divided into equal parts, the number of which is equal to the number of controlled points, each of which on the corresponding section transmits the sign of readiness or un-readiness to transmit information in the form of pairs of signals "10" or "01". The number of pairs of signals on each section corresponds to an integral ratio of frequency of data transmission from the most remote and the given controlled point.EFFECT: increase in informativeness and operational efficiency of telemechanics system.3 cl, 3 dwg |
