# Bind EngHigh & EngLow in UDT to PLC tag

**URL:** <https://forum.inductiveautomation.com/t/bind-enghigh-englow-in-udt-to-plc-tag/50426>\
**Category:** Ignition\
**Tags:** ignition80\
**Created:** [August 29, 2021, 8:08pm UTC](https://forum.inductiveautomation.com/t/bind-enghigh-englow-in-udt-to-plc-tag/50426 "2021-08-29T20:08:48Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![Eric\_G](https://avatars.discourse-cdn.com/v4/letter/e/258eb7/32.png) [@Eric\_G](https://forum.inductiveautomation.com/u/Eric_G)\
**Post date:** [August 29, 2021, 8:08pm UTC](https://forum.inductiveautomation.com/t/bind-enghigh-englow-in-udt-to-plc-tag/50426/1 "2021-08-29T20:08:48Z")

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I’m trying to bind the EngHigh & EngLow numeric properties of a tag inside a UDT definition but can’t seem to figure out the right syntax. The only thing that seems to work is a numeric literal, and that hardly seems like a binding.

Using Ignition 8.1.7

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**Author:** ![michael2](https://avatars.discourse-cdn.com/v4/letter/m/3e96dc/32.png) [@michael2](https://forum.inductiveautomation.com/u/michael2)\
**Post date:** [August 29, 2021, 9:28pm UTC](https://forum.inductiveautomation.com/t/bind-enghigh-englow-in-udt-to-plc-tag/50426/2 "2021-08-29T21:28:26Z")

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I’m fairly certain you can’t bind a tag to those properties dynamically, but you can set up a script to write to them.

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**Author:** ![Eric\_G](https://avatars.discourse-cdn.com/v4/letter/e/258eb7/32.png) [@Eric\_G](https://forum.inductiveautomation.com/u/Eric_G)\
**Post date:** [August 29, 2021, 10:05pm UTC](https://forum.inductiveautomation.com/t/bind-enghigh-englow-in-udt-to-plc-tag/50426/3 "2021-08-29T22:05:37Z")

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ok, that explains that then, thank you

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**Author:** ![Gaurav.Shitole](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/gaurav.shitole/32/72050_2.png) [@Gaurav.Shitole](https://forum.inductiveautomation.com/u/Gaurav.Shitole)\
**Post date:** [August 31, 2021, 8:04pm UTC](https://forum.inductiveautomation.com/t/bind-enghigh-englow-in-udt-to-plc-tag/50426/4 "2021-08-31T20:04:05Z")

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Yep one way would be to write a Tag value change script on your MaxValue tag. So whenever the value of your MaxValue changes it should write to the engHigh of your tag.