# Status Chart values

**URL:** <https://forum.inductiveautomation.com/t/status-chart-values/9833>\
**Category:** Ignition\
**Created:** [March 24, 2015, 9:31am UTC](https://forum.inductiveautomation.com/t/status-chart-values/9833 "2015-03-24T09:31:46Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![Serhii](https://avatars.discourse-cdn.com/v4/letter/s/df788c/32.png) [@Serhii](https://forum.inductiveautomation.com/u/Serhii)\
**Post date:** [March 24, 2015, 9:31am UTC](https://forum.inductiveautomation.com/t/status-chart-values/9833/1 "2015-03-24T09:31:46Z")

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Hi!  
Help please with understanding of Status Chart.  
I created 10 memory tags with history scan class of 300000ms (5 min).  
Then I created Status Chart and made Tag History Property binding for Series Data.  
Why values of AHU1 starts from earlier time than I started history?  
About of this the count of rows of dataset is 576 but must be 2.

 ![](https://us1.discourse-cdn.com/inductiveautomation/original/2X/5/59e07444cbc67d7b9c6e557e195340d93b3140cc.jpg)  
  
 ![](https://us1.discourse-cdn.com/inductiveautomation/original/2X/4/44d8d54cbbe50f588d9c2494e6ddf82948e34882.jpg)  
  
 ![](https://us1.discourse-cdn.com/inductiveautomation/original/2X/0/0ac3924e00d438217b34bbf081111928c90fa226.jpg)