它通过OPC DA可以连接到任何数据源上采集实时数据,也可连接到诸如过程历史数据库 (process historian) 的存档数据源,使用OPC HDA去获取历史数据。 请点击这里获得更多信息。
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process historian
过程的历史学家
以上为机器翻译结果，长、整句建议使用 人工翻译 。
Masters credits having a historian on staff during the development process for keeping them on track and not letting them take too many liberties.
CNN: American history unfolds in 'Assassin's Creed 3'
And in just a few minutes, you're going to hear a little bit more about the whole process of state visits and dinners from White House Historian, Bill Allman.
WHITEHOUSE: First Lady Michelle Obama Discusses State and Official Visits | The White House
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