| 摘要 |
<p>PURPOSE:To prevent the generation of time differences among plural devices by mutually connecting a system clock for managing the time of the whole system and plural devices to be managed by the time of the system clock and providing each device with a time difference data storing part and a time difference data processing part. CONSTITUTION:In the case of correcting the time of a device 31, the device 31 fetches correcting time data by a keyboard input or the like and fetches the time data of the system clock 2 through a transmission equipment 1. A difference between the correcting time data and the time data of the system clock is calculated and stored in a time difference data storing part 41 as time data. The time difference data are transmitted to all other devices 32, 33 through the equipment 1. The other devices 32, 33 receive the time difference data sent from the device 31 and sets up the data in time difference data storing parts 42, 43 included in its own devices 32, 33. Since reading/writing among plural devices does not compete with each other, respective devices 31 to 33 can be prevented from writing abnormal data.</p> |
