| 摘要 |
A data transfer unit includes: a collection-interval storage unit that storing therein a collection interval set by the host computer; a data collection unit reading a collection interval stored in the collection-interval storage unit and collecting device data at the read collection interval; a transfer-interval storage unit storing therein a transfer interval set by the host computer, which is equal to or larger than the collection interval; a ring buffer accumulating and storing therein device data that are collected by the data collection unit and have not been transferred to the host computer by a data transferring unit; and a data transferring unit reading a transfer interval stored in the transfer-interval storage unit, and collectively transfers device data accumulated and stored in the ring buffer to the host computer at the read transfer interval. |
