# Ignition Tag Browser

**URL:** <https://forum.inductiveautomation.com/t/ignition-tag-browser/98750>\
**Category:** Ignition\
**Tags:** ignition81\
**Created:** [November 18, 2024, 6:22pm UTC](https://forum.inductiveautomation.com/t/ignition-tag-browser/98750 "2024-11-18T18:22:57Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![Mark\_Edwards](https://avatars.discourse-cdn.com/v4/letter/m/eb9ed0/32.png) [@Mark\_Edwards](https://forum.inductiveautomation.com/u/Mark_Edwards)\
**Post date:** [November 18, 2024, 6:22pm UTC](https://forum.inductiveautomation.com/t/ignition-tag-browser/98750/1 "2024-11-18T18:22:57Z")

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What is it that allows ignition to view live tag values in the tag browser while having Designer open?

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**Author:** ![Benjamin\_Furlani](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/benjamin_furlani/32/66084_2.png) [@Benjamin\_Furlani](https://forum.inductiveautomation.com/u/Benjamin_Furlani)\
**Post date:** [November 18, 2024, 6:40pm UTC](https://forum.inductiveautomation.com/t/ignition-tag-browser/98750/2 "2024-11-18T18:40:17Z")

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The tag browser is what you are referring to

 ![image](https://us1.discourse-cdn.com/inductiveautomation/original/3X/3/c/3c28ba9a1961bb876b48014ccdcc3f4ce01e55a2.png)

Are you asking what makes this possible or how to see it?

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<div class="post-metadata">

**Author:** ![Mark\_Edwards](https://avatars.discourse-cdn.com/v4/letter/m/eb9ed0/32.png) [@Mark\_Edwards](https://forum.inductiveautomation.com/u/Mark_Edwards)\
**Post date:** [November 18, 2024, 7:04pm UTC](https://forum.inductiveautomation.com/t/ignition-tag-browser/98750/3 "2024-11-18T19:04:40Z")

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Yes, Thank you.  
I was curious about what underlying mechanism/programming makes it possible to have live tag values displayed in the Tag Browser shown in your screen shot. I figured it is apart of the OP UA server, but was not sure for example if I have a device reading battery voltage and can see it constantly updating down to one one-hundredth of a volt seemly not to skip any change.

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**Author:** ![Kevin.Herron](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/kevin.herron/32/7259_2.png) [@Kevin.Herron](https://forum.inductiveautomation.com/u/Kevin.Herron)\
**Post date:** [November 18, 2024, 7:09pm UTC](https://forum.inductiveautomation.com/t/ignition-tag-browser/98750/4 "2024-11-18T19:09:27Z")

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OPC is one of the mechanisms that might be updating a tag, but this all happens on the Gateway.

Between the Designer and Gateway is an HTTP connection that is polling for updates using our own implementation. In 8.3 that becomes a WebSocket connection, but this is really just an implementation detail for most people.