# PLC Tags Unknown **URL:** \ **Category:** Ignition\ **Created:** [January 19, 2018, 8:06pm UTC](https://forum.inductiveautomation.com/t/plc-tags-unknown/16657 "2018-01-19T20:06:40Z")\ **Posts on this page:** 4\ **Page:** 1
**Author:** ![Matthew77](https://avatars.discourse-cdn.com/v4/letter/m/7ba0ec/32.png) [@Matthew77](https://forum.inductiveautomation.com/u/Matthew77)\ **Post date:** [January 19, 2018, 8:06pm UTC](https://forum.inductiveautomation.com/t/plc-tags-unknown/16657/1 "2018-01-19T20:06:40Z")
Plc tags are good in the OPC Browser but are Unknown when i drag them into the project ---
**Author:** ![mrogers](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/mrogers/32/4110_2.png) [@mrogers](https://forum.inductiveautomation.com/u/mrogers)\ **Post date:** [January 19, 2018, 8:43pm UTC](https://forum.inductiveautomation.com/t/plc-tags-unknown/16657/2 "2018-01-19T20:43:26Z")
Start by checking the “OPC Connections” part of the Status page on the gateway. Sounds like your connection isn’t working right. ---
**Author:** ![Matthew77](https://avatars.discourse-cdn.com/v4/letter/m/7ba0ec/32.png) [@Matthew77](https://forum.inductiveautomation.com/u/Matthew77)\ **Post date:** [January 19, 2018, 8:55pm UTC](https://forum.inductiveautomation.com/t/plc-tags-unknown/16657/3 "2018-01-19T20:55:45Z")
It is just my inputs and output all of my other tags are good ---
**Author:** ![musiclovershq](https://avatars.discourse-cdn.com/v4/letter/m/e274bd/32.png) [@musiclovershq](https://forum.inductiveautomation.com/u/musiclovershq)\ **Post date:** [March 18, 2020, 2:40am UTC](https://forum.inductiveautomation.com/t/plc-tags-unknown/16657/4 "2020-03-18T02:40:34Z")
I am having the same issue as well. Most of my dint and booleans work but my strings all come in as null and unkown