Showing results 1 to 2 of 2

Thread: Extended trend - archive data

  1. #1
    Join Date

    Default Extended trend - archive data


    I am trying to plot a historic trend for three tags. All three tags belong to the same archive.One tags value will be changing continuously(tag1) but the other two remains almost constant(tag2 and tag3).
    When i see this trend in Runtime i can see that its plotting the tag1 but the other two tags value is not plotted. and when i enable the cursor i see the instantaneous value only for tag1 and other two tags are blank.

    Is this because of some variable setting ? i am unable to find why the trend is not plotting these variables. Can you please suggest how to proceed?


  2. #2
    Join Date
    Salzburg, AT

    Default Re: Extended trend - archive data

    The trend can draw a curve only if there is some data recorded about the particular variable for displaying period (actually in these ARX files which trend opens looking for data for the display period).

    So when Historian is recording data not cyclically but 'on change' and a variable typically keeps the same value for longer as Historian saving interval - then you should activate setting 'save process image during start'. This will assure that in each ARX file at least one value of seldom changing variable is stored too.

Similar Threads

  1. extended trend options
    By kasimosman in forum zenon Supervisor
    Replies: 3
    Last Post: 21st February 2014, 15:23
  2. Extended Trend parameters
    By fabio79 in forum zenon Supervisor
    Replies: 2
    Last Post: 5th September 2012, 13:41
  3. Replies: 2
    Last Post: 24th August 2011, 08:22
  4. Extended Trend HD Depth
    By shikra in forum zenon Supervisor
    Replies: 3
    Last Post: 10th May 2011, 23:36
  5. Extended trend module question
    By peterg in forum zenon Supervisor
    Replies: 5
    Last Post: 4th August 2009, 23:58

Posting Rules

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts