Data transfer device

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.

主权项

1. A data transfer device comprising:
a collection-interval storage unit that stores therein a collection interval set by a high-order device; a data-specification storage unit that stores a type of control data related to an FA system, which is set by the high-order device; a data collection unit that reads the collection interval stored in the collection-interval storage unit and the type of the control data stored in the data-specification storage unit, and collects control data of the read type from the FA system at the read collection interval; a transfer-interval storage unit that stores therein a transfer interval set by the high-order device, which is equal to or larger than the collection interval stored in the collection-interval storage unit; a temporary storage unit that accumulates and stores therein the control data collected by the data collection unit; and a data transferring unit that reads the transfer interval stored in the transfer-interval storage unit, and collectively transfers the control data collected by the data collection unit, which is accumulated and stored in the temporary storage unit, at the read transfer interval to the high-order device, wherein when the collection interval stored in the collection-interval storage unit is updated by the high-order device, the data collection unit reads the updated collection interval to change the collection interval at which the control data is collected to the updated collection interval, wherein the control data is configured to be transferred to the high-order device on a real-time basis for monitoring of the control data by setting the transfer interval equal to the collection interval.