# Write only tags

**URL:** <https://forum.inductiveautomation.com/t/write-only-tags/3715>\
**Category:** Ignition\
**Created:** [December 7, 2011, 8:22pm UTC](https://forum.inductiveautomation.com/t/write-only-tags/3715 "2011-12-07T20:22:07Z")\
**Posts on this page:** 5\
**Page:** 1

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**Author:** ![Robert](https://avatars.discourse-cdn.com/v4/letter/r/e95f7d/32.png) [@Robert](https://forum.inductiveautomation.com/u/Robert)\
**Post date:** [December 7, 2011, 8:22pm UTC](https://forum.inductiveautomation.com/t/write-only-tags/3715/1 "2011-12-07T20:22:07Z")

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Many different protocols have the write only concept. Supporting this in SQLTags would make supporting these protocols easier.

eg: write a 1 to a control point. The feedback (if any) would be a different point that would be read only.

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**Author:** ![Michael.Stofan](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/michael.stofan/32/3342_2.png) [@Michael.Stofan](https://forum.inductiveautomation.com/u/Michael.Stofan)\
**Post date:** [February 28, 2012, 6:51pm UTC](https://forum.inductiveautomation.com/t/write-only-tags/3715/2 "2012-02-28T18:51:05Z")

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You can set read/write permissions on SQLTags. If you set the SQLTag permissions to be read-only, you may get the results you’re after.

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**Author:** ![Robert](https://avatars.discourse-cdn.com/v4/letter/r/e95f7d/32.png) [@Robert](https://forum.inductiveautomation.com/u/Robert)\
**Post date:** [February 28, 2012, 7:21pm UTC](https://forum.inductiveautomation.com/t/write-only-tags/3715/3 "2012-02-28T19:21:13Z")

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Actually, today I would set up a read/write tag and just never read it

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**Author:** ![Travis.Cox](https://avatars.discourse-cdn.com/v4/letter/t/b9bd4f/32.png) [@Travis.Cox](https://forum.inductiveautomation.com/u/Travis.Cox)\
**Post date:** [February 29, 2012, 2:04am UTC](https://forum.inductiveautomation.com/t/write-only-tags/3715/4 "2012-02-29T02:04:26Z")

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Then you should use the system.opc.writeValue function to write without reading. It doesn’t really make sense to create a tag just for writing purposes.

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**Author:** ![Robert](https://avatars.discourse-cdn.com/v4/letter/r/e95f7d/32.png) [@Robert](https://forum.inductiveautomation.com/u/Robert)\
**Post date:** [February 29, 2012, 3:37pm UTC](https://forum.inductiveautomation.com/t/write-only-tags/3715/5 "2012-02-29T15:37:36Z")

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> [@Travis.Cox](#):
>
> It doesn't really make sense to create a tag just for writing purposes.

Sure it does 🙂 you just need the 'write' context.

But thanks for the tip, I'll look into that.