METHOD AND SYSTEM FOR TRANSMITTING MESSAGES BETWEEN SEVERAL STATIONS OF A DECENTRALIZED INDUSTRIAL LOCAL NETWORK WITH DETERMINISTIC ACCESS PROTOCOL BY CIRCULATION OF TOKEN

摘要

P METHOD AND SYSTEM FOR EXCHANGING MESSAGES BETWEEN SEVERAL STATIONS INTERCONNECTED BETWEEN THEM BY A COMMON MEDIA OR MEDIA 12. EACH STATION HAS A CLEAN ADDRESS, AND ACCESS TO THE MEDIA 12 IS SHARED BETWEEN THE STATIONS BY A DETERMINISTIC PROTOCOL A CIRCULATION OF TOKEN MANAGED BY A COUPLER CR1 ... CRN ASSOCIATED WITH EACH STATION. FORMING MEANS FOR A COLLISION SIGNAL ENSURE THE DETECTION OF THE TOKEN DUPLICATION. MEANS FOR DETECTING AN ACTIVITY SIGNAL PERMIT AFTER THE FLOW OF PREDETERMINAL WAITING TIMES, TO DETERMINE THE ACCUSED OF IMPLICIT READING OF THE TOKEN, THE LOSS OF TOKEN AND THE ALGORITHM OF REGENERATION OF THE TOKEN. THE MEDIA 12 IS SHAPED BY A DOUBLE CABLE (LINES L1 AND L2), AND ACTIVE REDUNDANCY IS MONITORED PERMANENTLY BY EACH COUPLER EQUIPPED WITH A MANAGEMENT AUTOMATE 42 COMPRISING A FIRST AND A SECOND CIRCUITS 46, 48 OF THE PREPARATION OF THE STATE OF THE COMMUNICATION PATH V1, V2, AND A CIRCUIT 50 FOR SYNTHESIS OF THE PREVIOUS STATES AND ELEMENTARY SIGNALS OF ACTIVITY AND COLLISION OF THE TWO WAYS V1, V2. / P P APPLICATION: INDUSTRIAL LOCAL NETWORK. / P