# UDT member property binding

**URL:** <https://forum.inductiveautomation.com/t/udt-member-property-binding/41539>\
**Category:** Ignition\
**Created:** [December 15, 2020, 7:56pm UTC](https://forum.inductiveautomation.com/t/udt-member-property-binding/41539 "2020-12-15T19:56:54Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![AlThePal](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/althepal/32/3603_2.png) [@AlThePal](https://forum.inductiveautomation.com/u/AlThePal)\
**Post date:** [December 15, 2020, 7:56pm UTC](https://forum.inductiveautomation.com/t/udt-member-property-binding/41539/1 "2020-12-15T19:56:55Z")

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Is it possible to set a property of a UDT member using the value of another member of the UDT?

For example if you have a UDT with 2 members:

- Temperature
- Comms OK

I want to disable Temperature if the Comms OK member is false.

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<div class="post-metadata">

**Author:** ![dkhayes117](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/dkhayes117/32/68344_2.png) [@dkhayes117](https://forum.inductiveautomation.com/u/dkhayes117)\
**Post date:** [December 15, 2020, 8:03pm UTC](https://forum.inductiveautomation.com/t/udt-member-property-binding/41539/2 "2020-12-15T20:03:09Z")

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If I understand what you are asking, then yes you can. I have a sql tag in a UDT that uses a memory tag in the same UDT with this notation

```auto
'{[.]uname}'

```

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<div class="post-metadata">

**Author:** ![AlThePal](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/althepal/32/3603_2.png) [@AlThePal](https://forum.inductiveautomation.com/u/AlThePal)\
**Post date:** [December 15, 2020, 8:11pm UTC](https://forum.inductiveautomation.com/t/udt-member-property-binding/41539/3 "2020-12-15T20:11:49Z")

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That looked promising, but when I bound a boolean OPC tag member to the _Enabled_ property of another member, the enabled status shows _null_ whether the first member is true or false.

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<div class="post-metadata">

**Author:** ![dkhayes117](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/dkhayes117/32/68344_2.png) [@dkhayes117](https://forum.inductiveautomation.com/u/dkhayes117)\
**Post date:** [December 15, 2020, 8:40pm UTC](https://forum.inductiveautomation.com/t/udt-member-property-binding/41539/4 "2020-12-15T20:40:06Z")

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Make sure you don’t use quotes in an expression. The quotes around the tag name is only for queries when it needs to be a string. Also, there should be a tag browser option to get to the UDT members.  
 ![image](https://us1.discourse-cdn.com/inductiveautomation/original/3X/4/5/4526a77d4221cdd49a1f8b5973c65cad5be9e3a5.png)