| 摘要 |
PURPOSE:To perform efficient data transfer to all subordinate stations by providing in a main station registers wherein frequencies, priority levels and starting points of services to the subordinate station. CONSTITUTION:A main station compares the contents of the 3rd registers A3, B3 and C3, showing states of subordinate stations A, B and C, with the execution level of service. When the contents of the register A3 corresponding to the station A reach the execution level of service, the service to the station A is started. On the completion of the service, the contents of the registers A2 and A3 are rewritten. The contents of the register A2 vary with transferred data. Namely, priority which corresponds to the data is held. Then, whether the service is offered or not is investigated by referring to the contents of the register B3 which corresponds to the station B. When its contents are at the execution level, the service is started. Similarly, the service to other subordinate stations is achieved successively. |
