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Thread: Historian Read Back

  1. #1

    Default Historian Read Back

    Hi,

    Please help me on this issue:

    In the case with architecture of using Historian Computer working independently with Server Computer, is there anyway to store database in both Server Computer and Historian Computer?

    As I see Server Computer will save format in internal database, if I configure Evacuation after storage time in SQL database to Historian Computer, all the historian database in Server Computer will be deleted and transfer all to Historian Computer. In the case, if I want to see the historian trend in the past, how can I take the data back from Historian Computer?

    Thank you all!

  2. #2
    Join Date
    28.02.2013
    Posts
    119

    Default Re: Historian Read Back

    Hello anbkhn90,

    there is no need to do anything. When opening a trend on server machine it will connect automatically to histrorian computer sql database and retrieve evacuated data from there.

    Regards,
    Felix

  3. #3

    Default Re: Historian Read Back

    Quote Originally Posted by felixst View Post
    Hello anbkhn90,

    there is no need to do anything. When opening a trend on server machine it will connect automatically to histrorian computer sql database and retrieve evacuated data from there.

    Regards,
    Felix

    HI Felixst,

    Thanks for your answering,
    So as your explanation, I can totally read old events or trend from Historian Computer without doing any configuration?
     

  4. #4
    Join Date
    28.02.2013
    Posts
    119

    Default Re: Historian Read Back

    Hello,

    zenon archive data that has been written to the evacuation database will be automatically read back, yes!
    So that includes "events"-variable values that are stored in a zenon archive.

    Data from our chronological event list (CEL) is not covered by this mechanism. Neither the evacuation, nor the read back.

    Regards,
    Felix

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