Method for pre-defining token bus time slot

The invention provides a method for pre-defining a token bus time slot. A system pre-defines a token bus time slot priority, and each unit judges the units occupied by the bus at present, a time slot and the sequence of occupying the time slot through a received message, calculates a bus time slot occupied by itself, and occupies the bus in sequence to send the message. By adoption of the storage working mode for pre-defining the token bus time slot provided by the invention, all units on the bus judge the units and the time slots occupying the bus at present through the number and the times of receiving the messages and sends the messages according to the pre-defined bus time slot priority sequence. By adoption of the communication method for pre-defining the token bus time slot provided by the invention, reliable communication can be realized, the communication response can be accelerated, and the interaction time can be shortened. 本发明提供种令牌总线时隙预定义方法，其系统预先定义令牌总线时隙优先级，每个单元通过接收的报文，判定当前占用总线的单元、时隙及占用时隙的先后顺序，并计算出