| 摘要 |
PURPOSE:To set time without any error in respective clock devices by providing a main station clock device which produces time synchronization data and a sub station clock device which sets time with receiving timing of the synchronous signal as its own time. CONSTITUTION:In a telecontroller station 100, a clock device A1 as a main station and a clock device B1 as a sub station are connected via a transmission path 2. The device A1 houses a highly accurate time data generator and the device B1 is relatively poor in accuracy. The device A1 can generate highly accurate time data and time synchronous data DT containing synchronous signals, and time synchronous data in the respective devices A1, B1 is exchanged by transmitting and receiving sections. The device B1 sets highly accurate time applied on time data with receiving timing of the synchronous signals in the received data DT as its own time. This synchronization processing is carried out at time intervals whereby an accumulation error due to an oscillation frequency error or the like of the device B1 does not exceed zero. This enables time adjustment between the devices A1 and B1 with zero error. |
