# Aggregate UDT Alarms **URL:** \ **Category:** Ignition\ **Tags:** ignition81\ **Created:** [November 15, 2023, 4:48pm UTC](https://forum.inductiveautomation.com/t/aggregate-udt-alarms/81934 "2023-11-15T16:48:50Z")\ **Posts on this page:** 3\ **Page:** 1
**Author:** ![Jay\_Britton1](https://avatars.discourse-cdn.com/v4/letter/j/439d5e/32.png) [@Jay\_Britton1](https://forum.inductiveautomation.com/u/Jay_Britton1)\ **Post date:** [November 15, 2023, 4:48pm UTC](https://forum.inductiveautomation.com/t/aggregate-udt-alarms/81934/1 "2023-11-15T16:48:50Z")
Hi everyone, Have an interesting problem I need some advice on. I have a UDT with 3 tags. Each tag has 2 alarms. One low priority and one high priority. What I want to do is add an expression (or other tag type) to the UDT that is an aggregate of the 6 alarms where 0=no alarms active, 1=any low priority is active, 2=any high priority is active. Not sure how to write this expression or if there is a better way of doing this. Thanks. ![udt](https://us1.discourse-cdn.com/inductiveautomation/original/3X/f/7/f7b0eaaf164da32c1bb1fd1334f074d29e7e4c74.png) ---
**Author:** ![kyler.kamyszek](https://avatars.discourse-cdn.com/v4/letter/k/a4c791/32.png) [@kyler.kamyszek](https://forum.inductiveautomation.com/u/kyler.kamyszek)\ **Post date:** [November 15, 2023, 6:37pm UTC](https://forum.inductiveautomation.com/t/aggregate-udt-alarms/81934/2 "2023-11-15T18:37:52Z")
Use this in an expression tag. [https://docs.inductiveautomation.com/display/DOC81/isAlarmActiveFiltered](https://docs.inductiveautomation.com/display/DOC81/isAlarmActiveFiltered) ---
**Author:** ![Jay\_Britton1](https://avatars.discourse-cdn.com/v4/letter/j/439d5e/32.png) [@Jay\_Britton1](https://forum.inductiveautomation.com/u/Jay_Britton1)\ **Post date:** [November 15, 2023, 9:23pm UTC](https://forum.inductiveautomation.com/t/aggregate-udt-alarms/81934/3 "2023-11-15T21:23:23Z")
Exactly what I needed. That worked perfectly. Thanks