| 摘要 |
<p>PURPOSE:To provide a time synchronizing method capable of precisely grasping a required time for transmission in a loop type network and precisely keeping the time synchronization of all stations on the network. CONSTITUTION:Time inquiry commands QA, QB are outputted from a main station 1 to main and sub transmission routes 3, 4, loop transmission required times tL for circulating the commands in the transmission routes and returning to the self station are measured, and one-way transmission required times tA, tB to a slave station are calculated from these times and internal times TA, TB stored in time responses AA, AB from the slave station according to the commands, and the internal time of the slave station is reset by a time set command considering these as a time set delay time DELTAT to the slave station.</p> |
