I have system 800xA 5.1 FP4.
I have problem viewing the old data on the trend display. In the log configuration- data is stored for 1 year and collected every 10sec.
I am able to see the trace on the trend display for last 3 months but nothing before 3 months.
I did following setting on the trend display for a specific tag:
1. set the date-time to e.g. 01.08.2016
2. Logname set to 'Seamless'
3. treatment to 'momentary'.
But I dont get any data on the trend display. Can anyone please advice on what is the correct setting on the trend display to view the old data that is stored for 1 year?
Voted best answer
Hi from Australia,
Silly question, but it has to be asked: When was the log created? Three months ago? You can check the creation and modification dates of the Log Configuration Aspect for a clue. The check of stored data using the Status tab (as already suggested) will show some bad/uncertain data when the first samples were logged and nothing before that time.
Another question: Is only Basic History used or is there an IM or 800xA Historian as well. If so, the Log Manager may try to get data from another place.
From the Trend Display it should be possible to display data as far back as data exist.
To check the data please use the Log Configuration Aspect to check that data is actualy collected as far back as you expect.
Select the correct Log
Select the Status tab, use Settings to enter the date and Read to get the data
If data is missing, check the timestamps.