| 摘要 |
<p>PURPOSE:To transmit an information with high emergency without intermission by providing a control means switching a subloop into a token passing system and connecting a main loop with the subloop when it is detected that a main loop is faulty. CONSTITUTION:Wheel turning signals 12-16 required for the slip control of a vehicle requesting the real time performance in the main loop are set and a sound signal for an equipment such as a car stereo equipment 7 requiring very high speed and continuity is sent in the subloop simultaneously with the main loop. When the signal transmission is disabled due to a part of disconnection of optical fibers 1a-5a constituting the main loop, the main loop is not operated. As the countermeasures of a fault, the sound signal transmission of the subloop is stopped, a part or all of the subloops 1b-5b are connected to the main loop, a token packet and turning signal are sent to the subloop while being bypassed to transmit the signal consecutively.</p> |
