# Cannot see some PLC tags on Tag 'Browse Devices', AND error when adding as OPC tag via import **URL:** \ **Category:** Ignition\ **Tags:** ignition81\ **Created:** [November 9, 2021, 7:55pm UTC](https://forum.inductiveautomation.com/t/cannot-see-some-plc-tags-on-tag-browse-devices-and-error-when-adding-as-opc-tag-via-import/52898 "2021-11-09T19:55:33Z")\ **Posts on this page:** 5\ **Page:** 1
**Author:** ![jeff.ryan](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/jeff.ryan/32/25543_2.png) [@jeff.ryan](https://forum.inductiveautomation.com/u/jeff.ryan)\ **Post date:** [November 9, 2021, 7:55pm UTC](https://forum.inductiveautomation.com/t/cannot-see-some-plc-tags-on-tag-browse-devices-and-error-when-adding-as-opc-tag-via-import/52898/1 "2021-11-09T19:55:33Z")
Hello, I’m working with PLC tags, physically connected to the PLC, and I’m not seeing some of them when trying to add to the project (gateway) via ‘Browse Devices’. So, I try to add them ‘manually’ instead, via a JSON import and I’m getting a Value ‘bad’, ‘Error writing to’. I can see the tags in Logix Designer , Controller tags fine. I can’t see any obvious differences from these to tags I can see OK. I can get additional processor revision/detailed information that might be helpful. I’ve worked with several other of our PLC programs, and this is the first time I’ve run across this, so something different here. Thanks. ![CapturePLC](https://us1.discourse-cdn.com/inductiveautomation/original/3X/e/0/e021297662c6fc1493c2b95423312716c21679ee.jpeg) ---
**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 9, 2021, 8:00pm UTC](https://forum.inductiveautomation.com/t/cannot-see-some-plc-tags-on-tag-browse-devices-and-error-when-adding-as-opc-tag-via-import/52898/2 "2021-11-09T20:00:41Z")
Are there any errors in the Ignition gateway logs? What is the datatype of the tag you can’t see in the OPC browser? What firmware version is the PLC? ---
**Author:** ![jeff.ryan](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/jeff.ryan/32/25543_2.png) [@jeff.ryan](https://forum.inductiveautomation.com/u/jeff.ryan)\ **Post date:** [November 9, 2021, 8:07pm UTC](https://forum.inductiveautomation.com/t/cannot-see-some-plc-tags-on-tag-browse-devices-and-error-when-adding-as-opc-tag-via-import/52898/3 "2021-11-09T20:07:33Z")
1. Nothing in the error logs that appear to be related to this problem. I’ve haven’t been in there before, so not positive. 2. BOOL. 3. 32.011 ![CaptureLOG](https://us1.discourse-cdn.com/inductiveautomation/original/3X/e/0/e011c218a5974f5c3519ee0a66d9ff8e143a2164.jpeg) ---
**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 9, 2021, 8:10pm UTC](https://forum.inductiveautomation.com/t/cannot-see-some-plc-tags-on-tag-browse-devices-and-error-when-adding-as-opc-tag-via-import/52898/4 "2021-11-09T20:10:14Z")
Okay, bool arrays have a bit of a quirky appearance in the Logix driver, so maybe that’s all you’re seeing here. It’s talked about [here](https://docs.inductiveautomation.com/display/DOC81/Connecting+to+Logix) in the manual, but basically bool arrays are really just arrays of DWORD in the controller and the driver exposes them as such (unfortunate oversight long ago). ---
**Author:** ![jeff.ryan](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/jeff.ryan/32/25543_2.png) [@jeff.ryan](https://forum.inductiveautomation.com/u/jeff.ryan)\ **Post date:** [November 9, 2021, 8:16pm UTC](https://forum.inductiveautomation.com/t/cannot-see-some-plc-tags-on-tag-browse-devices-and-error-when-adding-as-opc-tag-via-import/52898/5 "2021-11-09T20:16:28Z")
Yup… That’s it. After quick fixing/testing, that does it, so now just a matter of creating them in a JSON and importing. Thanks.