# Writing to CODESYS OPC-UA Tags from Ignition Edge

**URL:** <https://forum.inductiveautomation.com/t/writing-to-codesys-opc-ua-tags-from-ignition-edge/98545>\
**Category:** Ignition\
**Created:** [November 13, 2024, 4:47am UTC](https://forum.inductiveautomation.com/t/writing-to-codesys-opc-ua-tags-from-ignition-edge/98545 "2024-11-13T04:47:23Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![Amos\_Brown](https://avatars.discourse-cdn.com/v4/letter/a/b38774/32.png) [@Amos\_Brown](https://forum.inductiveautomation.com/u/Amos_Brown)\
**Post date:** [November 13, 2024, 4:47am UTC](https://forum.inductiveautomation.com/t/writing-to-codesys-opc-ua-tags-from-ignition-edge/98545/1 "2024-11-13T04:47:24Z")

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I have implemented Ignition Edge on a Revolution Pi using CODESYS. I am able to see tag values in the Designer however when I try to write to the tags I get the following errors:

 ![image](https://us1.discourse-cdn.com/inductiveautomation/original/3X/b/c/bc964407ccab66dd9fab3e7c469d6bd42c902ff4.png)  
 ![image](https://us1.discourse-cdn.com/inductiveautomation/original/3X/4/0/40392c0bc5043b2a74a186ac0d7be0b40bb769b8.png)

The tags are set to read/write in CODESYS and in the Designer as well. I believe I have disabled all security in the Gateway as well?

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**Author:** ![David\_Stone](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/david_stone/32/79749_2.png) [@David\_Stone](https://forum.inductiveautomation.com/u/David_Stone)\
**Post date:** [November 13, 2024, 5:05am UTC](https://forum.inductiveautomation.com/t/writing-to-codesys-opc-ua-tags-from-ignition-edge/98545/2 "2024-11-13T05:05:55Z")

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Did you set the toggle at the top of the designer to the read write mode?

> **[General Designer Interface | Ignition User Manual](https://www.docs.inductiveautomation.com/docs/8.1/platform/designer/designer-user-interface#comm-mode)**
>
> Designer Spaces

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**Author:** ![Amos\_Brown](https://avatars.discourse-cdn.com/v4/letter/a/b38774/32.png) [@Amos\_Brown](https://forum.inductiveautomation.com/u/Amos_Brown)\
**Post date:** [November 13, 2024, 6:04am UTC](https://forum.inductiveautomation.com/t/writing-to-codesys-opc-ua-tags-from-ignition-edge/98545/3 "2024-11-13T06:04:16Z")

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That was it! Thanks for the incredibly speedy reply!