The design and application of data replication method among the control system, the field bus devices, and the monitoring and control system is introduced because the traditional data replication can not able to fulfill the data copying in the industrial field bus. The described data replication methods are three such unique; first the data replication latency reduced to one hundred nanoseconds or less; second the dynamic data can be copied; third without numerical control system and other systems-level interventions, data replication can be achieved alone; such data replication achieves a high real-time data transmission rate, interference-free copy, and according the Ptotocl specifications for NCUC-Bus fieldbus, the mentioned method copys the NCUC_Bus data link layer datas, and realizes to supervise the NCUC_Bus fieldbus devices and fieldbus status, experimental results verify the device can carry out replication with in real time, non-interference, reducing the task of the control system and is conducive to CNC operation.%针对传统数据复制方式无法应用在工业现场总线中的缺点,阐述了一种对于现场总线控制系统、现场总线设备及监控系统硬件数据复制的实现方式,此种数据复制方式有三点独特性:①数据复制延迟时间减少到百纳秒以下；②可实现数据动态复制；③无需数控系统等系统级的干预,即可独自实现数据复制.此种数据复制方式实现了对现场总线数据中高传输速率数据实时的、无干扰的复制,并结合NCUC_Bus现场总线,通过复制NCUC_Bus数据链路层数据,实现了对NCUC_Bus现场总线及现场总线上设备的监控,实验结果验证了这种装置可以实时的、无干扰的复制控制系统中数据,减少了控制系统任务,有利于提高数控系统性能.
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