# Accessing Tag EngUnit in Alarm Display Path Expression

**URL:** <https://forum.inductiveautomation.com/t/accessing-tag-engunit-in-alarm-display-path-expression/96405>\
**Category:** Ignition\
**Created:** [September 25, 2024, 5:27am UTC](https://forum.inductiveautomation.com/t/accessing-tag-engunit-in-alarm-display-path-expression/96405 "2024-09-25T05:27:24Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![nader.chinichian](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/nader.chinichian/32/9261_2.png) [@nader.chinichian](https://forum.inductiveautomation.com/u/nader.chinichian)\
**Post date:** [September 25, 2024, 5:27am UTC](https://forum.inductiveautomation.com/t/accessing-tag-engunit-in-alarm-display-path-expression/96405/1 "2024-09-25T05:27:24Z")

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I try following the expression in the Alarm Display Path to get the tag Eng Unit metadata but the tag() function returns nothing:

```python
{PathToParentFolder} + " Critical Range " + {value} + " " + tag({PathToTag} + ".EngUnit")

```

So how can we read the tag ".EngUnit" here?

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<div class="post-metadata">

**Author:** ![MMaynard](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/mmaynard/32/3366_2.png) [@MMaynard](https://forum.inductiveautomation.com/u/MMaynard)\
**Post date:** [September 25, 2024, 11:55am UTC](https://forum.inductiveautomation.com/t/accessing-tag-engunit-in-alarm-display-path-expression/96405/2 "2024-09-25T11:55:38Z")

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Messed around with all kinds of properties and ended up with

`tag(concat({itemPath},'.EngUnit'))`

Using PathToParentFolder or FullItemPath ends up having 'default' doubled up in the tag path.  
The tag diagnostics showed the path as

`[default]default/Global/alarmTestTag`

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<div class="post-metadata">

**Author:** ![nader.chinichian](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/nader.chinichian/32/9261_2.png) [@nader.chinichian](https://forum.inductiveautomation.com/u/nader.chinichian)\
**Post date:** [September 25, 2024, 12:08pm UTC](https://forum.inductiveautomation.com/t/accessing-tag-engunit-in-alarm-display-path-expression/96405/3 "2024-09-25T12:08:44Z")

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Thanks  
Why using simple + operand doesn't work here?