# Delay when populating power chart from tag history vs live tag value

**URL:** <https://forum.inductiveautomation.com/t/delay-when-populating-power-chart-from-tag-history-vs-live-tag-value/65077>\
**Category:** Ignition\
**Tags:** perspective\
**Created:** [October 11, 2022, 5:23pm UTC](https://forum.inductiveautomation.com/t/delay-when-populating-power-chart-from-tag-history-vs-live-tag-value/65077 "2022-10-11T17:23:51Z")\
**Posts on this page:** 6\
**Page:** 1

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**Author:** ![Bogdan\_Persa](https://avatars.discourse-cdn.com/v4/letter/b/ba8739/32.png) [@Bogdan\_Persa](https://forum.inductiveautomation.com/u/Bogdan_Persa)\
**Post date:** [October 11, 2022, 5:23pm UTC](https://forum.inductiveautomation.com/t/delay-when-populating-power-chart-from-tag-history-vs-live-tag-value/65077/1 "2022-10-11T17:23:51Z")

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I have a simple perspective display created, with an LED display component, linked to the live value of a tag. I also have a power chart component linked to the tag history of the same tag from the Led Display. There seems to be a dramatic delay of several minutes, between the live read out on the LED Display and the power chart's pen. What should I be checking?

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**Author:** ![Transistor](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/transistor/32/3380_2.png) [@Transistor](https://forum.inductiveautomation.com/u/Transistor)\
**Post date:** [October 11, 2022, 6:03pm UTC](https://forum.inductiveautomation.com/t/delay-when-populating-power-chart-from-tag-history-vs-live-tag-value/65077/2 "2022-10-11T18:03:34Z")

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What's your `props.config.refreshRate` set at. (You'll need to set `props.config.mode : realtime` to read it.)

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**Author:** ![pturmel](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/pturmel/32/3295_2.png) [@pturmel](https://forum.inductiveautomation.com/u/pturmel)\
**Post date:** [October 11, 2022, 6:40pm UTC](https://forum.inductiveautomation.com/t/delay-when-populating-power-chart-from-tag-history-vs-live-tag-value/65077/3 "2022-10-11T18:40:16Z")

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If your chart refresh is faster than your DB can deliver the data, you can get stuck with nothing. Monitor your DB queries and/or update the chart more slowly.

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**Author:** ![Bogdan\_Persa](https://avatars.discourse-cdn.com/v4/letter/b/ba8739/32.png) [@Bogdan\_Persa](https://forum.inductiveautomation.com/u/Bogdan_Persa)\
**Post date:** [October 12, 2022, 12:02pm UTC](https://forum.inductiveautomation.com/t/delay-when-populating-power-chart-from-tag-history-vs-live-tag-value/65077/4 "2022-10-12T12:02:13Z")

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refresh rate is set to 1,000 mS and mode is set to realtime  
the chart updates every second, but it's several minutes behind the live data on that tag it seems

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**Author:** ![pturmel](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/pturmel/32/3295_2.png) [@pturmel](https://forum.inductiveautomation.com/u/pturmel)\
**Post date:** [October 12, 2022, 12:17pm UTC](https://forum.inductiveautomation.com/t/delay-when-populating-power-chart-from-tag-history-vs-live-tag-value/65077/5 "2022-10-12T12:17:43Z")

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Check for incorrect clocks in gateway, OPC server, and client machine.

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**Author:** ![Bogdan\_Persa](https://avatars.discourse-cdn.com/v4/letter/b/ba8739/32.png) [@Bogdan\_Persa](https://forum.inductiveautomation.com/u/Bogdan_Persa)\
**Post date:** [October 12, 2022, 12:58pm UTC](https://forum.inductiveautomation.com/t/delay-when-populating-power-chart-from-tag-history-vs-live-tag-value/65077/6 "2022-10-12T12:58:32Z")

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Thanks, I may have found the culprit. I have Ignition Edge running on a Groov RIO device from Opto22. I had it set up to update time via NTP, but it seems to pull the time ahead several minutes. I disabled for now and manually set time on device.