# Turn on\\off ignition edge tags

**URL:** <https://forum.inductiveautomation.com/t/turn-on-off-ignition-edge-tags/84607>\
**Category:** Ignition\
**Created:** [January 23, 2024, 5:38am UTC](https://forum.inductiveautomation.com/t/turn-on-off-ignition-edge-tags/84607 "2024-01-23T05:38:12Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![Purushothaman\_R](https://avatars.discourse-cdn.com/v4/letter/p/8797f3/32.png) [@Purushothaman\_R](https://forum.inductiveautomation.com/u/Purushothaman_R)\
**Post date:** [January 23, 2024, 5:38am UTC](https://forum.inductiveautomation.com/t/turn-on-off-ignition-edge-tags/84607/1 "2024-01-23T05:38:12Z")

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Hi Guys, i want to turn on\off tags in igntion edge. So i have created udt's in edge i have a boolean tag named control and also i have a opc tag named called Pressure so if i set the control(Boolean) tag to false the pressure values should be null is there any way to achieve this

 ![image](https://us1.discourse-cdn.com/inductiveautomation/original/3X/6/6/66466304d601dca3f3c5e86d4ebe3bb02989e2d9.png)

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**Author:** ![nminchin](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/nminchin/32/6911_2.png) [@nminchin](https://forum.inductiveautomation.com/u/nminchin)\
**Post date:** [January 23, 2024, 6:52am UTC](https://forum.inductiveautomation.com/t/turn-on-off-ignition-edge-tags/84607/2 "2024-01-23T06:52:33Z")

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You should handle this either in the GUI or you could create an expression tag that returns None on your condition, or the pressure value if not. You could also disable the pressure tag using a tag change event on the control tag