# OPC UA tag history "on change" not working

**URL:** <https://forum.inductiveautomation.com/t/opc-ua-tag-history-on-change-not-working/48859>\
**Category:** Ignition\
**Created:** [July 15, 2021, 4:28am UTC](https://forum.inductiveautomation.com/t/opc-ua-tag-history-on-change-not-working/48859 "2021-07-15T04:28:29Z")\
**Posts on this page:** 1\
**Showing post:** 19

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**Author:** ![SBL\_MC](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/sbl_mc/32/56813_2.png) [@SBL\_MC](https://forum.inductiveautomation.com/u/SBL_MC)\
**Post date:** [January 25, 2022, 11:52am UTC](https://forum.inductiveautomation.com/t/opc-ua-tag-history-on-change-not-working/48859/19 "2022-01-25T11:52:17Z")

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I see this in 8.1.11 as well. the PLC clock is one hour ahead and on change does not work. Is there a fix in later Ignition versions?

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