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Topic starter
Hello,
One of our customer wants a column chart, with the X-axis representing the DateTime, and Y-axis the data.
To my understanding, we use this chart to represent the correlation between X and Y over a time period (but no plotting of time).
Does anybody know if what the customer wants is doable? I did suggest to him Trend Viewer, but he wants the column bars in the chart.
Posted : 09/09/2022 5:17 pm
Hi Kantha,
This could be a tricky way to do it ...
Let's assume you have a register @Reference.Hour, configured as a trend, which is reset every hour and it's value is calculated and changes every minute.
So, it will climb from 0 to 59. If you put this value as X Data Source in the chart animation and your other variables as Series, then it will work but you will only be able to display historical data within an hour.
It cannot overlap a period on 2 different hours.
By extrapolation, you have a register @Reference.Day, reset at midnight and still calculated every minute.
Providing the value is unique for the whole day, it will give the rendering but the x axe is displayed (by default) as values, not timestamp.
Same could go for @Reference.Month or @Reference.Year.
For all this reference variables, the value should be unique for the period and increase proportionally.
Except to build a quick demo, you should not rely on any chrono because the save option is not enough. It has to be calculated accordingly to the current minute.
Actually, what the customer would like is to have a look and feel option on PcVue trend viewer, for instance, filling the portion below the points recorded. You should declare a wish SPR.
Posted : 14/09/2022 7:22 pm