# Nested UDT: bind sub UDT parameter to a parent UDT tag

**URL:** <https://forum.inductiveautomation.com/t/nested-udt-bind-sub-udt-parameter-to-a-parent-udt-tag/65907>\
**Category:** Ignition\
**Tags:** ignition81\
**Created:** [October 31, 2022, 10:47pm UTC](https://forum.inductiveautomation.com/t/nested-udt-bind-sub-udt-parameter-to-a-parent-udt-tag/65907 "2022-10-31T22:47:31Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![tecnoeletronic](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/tecnoeletronic/32/50975_2.png) [@tecnoeletronic](https://forum.inductiveautomation.com/u/tecnoeletronic)\
**Post date:** [October 31, 2022, 10:47pm UTC](https://forum.inductiveautomation.com/t/nested-udt-bind-sub-udt-parameter-to-a-parent-udt-tag/65907/1 "2022-10-31T22:47:31Z")

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Hi,

i would like to know if there is a way to bind a nested UDT parameter to a parent UDT tag. I know that you can "bind" it to a parent UDT parameter.

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<div class="post-metadata">

**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:** [November 1, 2022, 4:07am UTC](https://forum.inductiveautomation.com/t/nested-udt-bind-sub-udt-parameter-to-a-parent-udt-tag/65907/2 "2022-11-01T04:07:58Z")

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You can't _ **bind** _ UDT parameters to anything but other UDT parameters and perhaps some other special keywords (can't remember).

However, you _can_ use a tag change script to modify the UDT parameter value on change of the tag value.