| 摘要 |
PURPOSE:To transmit mutually and directly the terminal units by transmitting the address data, permitting to transmit to the terminal, transmitting the necessary packet signal by a master unit and stopping the transmission by the master unit during that time, with the interrupting signal from the terminal unit. CONSTITUTION:The transmitting signal of the first format composed of a mode signal, address data, control data, a return period and an interrupting request receiving part is transmitted from a master unit 1. When a terminal unit 2i to be interrupted out of terminal units 21-2n and extended terminal units 2'1 and 2'2 receives its own address, the interrupting signal is sent to the return period. The master unit 1 sends the second transmitting signal of the address search mode, returns the address to the terminal units 2i, continuously permits the terminal unit 2i to transmit, sends the signal for the necessary packet, and sends the completing signal after the sending is completed. The master unit 1 stops the sending of the signal during that period. Thus, the signal can be directly transmitted mutually between terminal units and the transmitting efficiency is improved. |
