| 摘要 |
<p>PURPOSE:To make time in the whole decentralized system coincident by applying the interruptin of synchronization to each terminal device having preset the absolute time to a CPU in plural terminal device. CONSTITUTION:A CPU and station terminals 2a...2e that are used for a control system for operating trains are connected to looped transmission lines 5, 6 through transmission devices 3, 4. These transmission lines 5, 6 are connected to the devices 3, 4 in the opposite direction of transmission to each other. On the other hand, circuits sending pulse 8A, 8B connected to a master clock 7 are connected to salver clocks 10, 10a-10e through circuits 9A, 6B, and from the circuit 8A, 8B, for instance, a pulse of 30sec cycle is sent out through pulse circuits 9A, 9B. And, for instance, after the station device 2a presets the time for generating the next pulse, if it detects a pulse in every 30sec from the master clock 7, then, it corrects the timer of the device 2a synchronizing with this pulse and sets the next pulse generating time to that of this pulse.</p> |
