# ControlLogix PLC tags not showing up in OPC browser

**URL:** <https://forum.inductiveautomation.com/t/controllogix-plc-tags-not-showing-up-in-opc-browser/79675>\
**Category:** Ignition\
**Created:** [September 26, 2023, 8:26pm UTC](https://forum.inductiveautomation.com/t/controllogix-plc-tags-not-showing-up-in-opc-browser/79675 "2023-09-26T20:26:16Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![indra.biswas](https://avatars.discourse-cdn.com/v4/letter/i/3bc359/32.png) [@indra.biswas](https://forum.inductiveautomation.com/u/indra.biswas)\
**Post date:** [September 26, 2023, 8:26pm UTC](https://forum.inductiveautomation.com/t/controllogix-plc-tags-not-showing-up-in-opc-browser/79675/1 "2023-09-26T20:26:16Z")

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For some reason Ignition(8.1.23) OPC browser was not subscribing to all the tags in my PLC (Controllogix 1756-L83ES, fw 32.12). I imported a few routines with the controller online, and for some reason the new tags were not being subscribed to from the OPC browser. I know those tags should show up, as I had other PLC's where this worked  
After a lot of troubleshooting, I finally managed to get them to subscribe by forcing a download on the PLC, I didn't change anything at all. Just forcing a download for some reason, seems to be more reliable in subscribing to all tags

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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:** [September 26, 2023, 8:28pm UTC](https://forum.inductiveautomation.com/t/controllogix-plc-tags-not-showing-up-in-opc-browser/79675/2 "2023-09-26T20:28:56Z")

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Sounds similar to a known issue that, as far as we're aware, is a firmware bug.

I think you can also do an online edit of an existing UDT (add/remove a member), or add a new UDT, to get it to refresh.