# Historical Tag Group Timing compared to Tag Tag Group Timing

**URL:** <https://forum.inductiveautomation.com/t/historical-tag-group-timing-compared-to-tag-tag-group-timing/53197>\
**Category:** Ignition\
**Tags:** ignition81\
**Created:** [November 17, 2021, 6:40pm UTC](https://forum.inductiveautomation.com/t/historical-tag-group-timing-compared-to-tag-tag-group-timing/53197 "2021-11-17T18:40:48Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![Dmart](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/dmart/32/13427_2.png) [@Dmart](https://forum.inductiveautomation.com/u/Dmart)\
**Post date:** [November 17, 2021, 6:40pm UTC](https://forum.inductiveautomation.com/t/historical-tag-group-timing-compared-to-tag-tag-group-timing/53197/1 "2021-11-17T18:40:48Z")

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How does the timing of the Tag Group setup on a tag corelate to the timing of the Historical Tag Group?  
If the Tag is being updated at a Rate of 5,000 from the PLC.  
and History is being updated at a rate of 500.  
Will the data be updated from the PLC at the higher rate of 500?  
Or will the historian just see the same tag value until the next scan of the PLC at 5,000?

In other words… Is it pointless to have the Historical Tag Group run faster than the Tags Tag Group?

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**Author:** ![paul-griffith](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/paul-griffith/32/37249_2.png) [@paul-griffith](https://forum.inductiveautomation.com/u/paul-griffith)\
**Post date:** [November 17, 2021, 6:48pm UTC](https://forum.inductiveautomation.com/t/historical-tag-group-timing-compared-to-tag-tag-group-timing/53197/2 "2021-11-17T18:48:19Z")

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> [@Dmart](#):
>
> Or will the historian just see the same tag value until the next scan of the PLC at 5,000?

That.

So, yes, it is pretty much pointless to have a historical group faster than the tag's actual execution rate.

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<div class="post-metadata">

**Author:** ![Dmart](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/dmart/32/13427_2.png) [@Dmart](https://forum.inductiveautomation.com/u/Dmart)\
**Post date:** [November 17, 2021, 7:12pm UTC](https://forum.inductiveautomation.com/t/historical-tag-group-timing-compared-to-tag-tag-group-timing/53197/3 "2021-11-17T19:12:02Z")

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Thanks! That’s what I thought, but wanted to make sure.