# A boolean tag, to trigger the alarm on the rising edge

**URL:** <https://forum.inductiveautomation.com/t/a-boolean-tag-to-trigger-the-alarm-on-the-rising-edge/72551>\
**Category:** Ignition\
**Created:** [April 18, 2023, 12:59am UTC](https://forum.inductiveautomation.com/t/a-boolean-tag-to-trigger-the-alarm-on-the-rising-edge/72551 "2023-04-18T00:59:29Z")\
**Posts on this page:** 3\
**Page:** 1

<div class="post-metadata">

**Author:** ![chaoliang](https://avatars.discourse-cdn.com/v4/letter/c/ba8739/32.png) [@chaoliang](https://forum.inductiveautomation.com/u/chaoliang)\
**Post date:** [April 18, 2023, 12:59am UTC](https://forum.inductiveautomation.com/t/a-boolean-tag-to-trigger-the-alarm-on-the-rising-edge/72551/1 "2023-04-18T00:59:29Z")

</div>

Hi,

I have configured a boolean tag, instead of using PLC, I want to use ignition alarm function to configure a alarm on the rising edge of the signal, means the alarm should be triggered when the signal is changing from 0 to 1.

I couldn't figure out the way to do it in the alarm configuration option.

Maybe I missed out some information, appreciated if anyone can advice.

---

<div class="post-metadata">

**Author:** ![andrew.budaiev](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/andrew.budaiev/32/72921_2.png) [@andrew.budaiev](https://forum.inductiveautomation.com/u/andrew.budaiev)\
**Post date:** [April 18, 2023, 1:14am UTC](https://forum.inductiveautomation.com/t/a-boolean-tag-to-trigger-the-alarm-on-the-rising-edge/72551/2 "2023-04-18T01:14:34Z")

</div>

Can't you just trigger alarm if it's equal 1 (true) 🤔?  
 ![image](https://us1.discourse-cdn.com/inductiveautomation/original/3X/5/3/53173f8ee3820d92e789b579ddd83dab410b352c.png)

---

<div class="post-metadata">

**Author:** ![Simen\_Minerd](https://avatars.discourse-cdn.com/v4/letter/s/e274bd/32.png) [@Simen\_Minerd](https://forum.inductiveautomation.com/u/Simen_Minerd)\
**Post date:** [April 18, 2023, 7:14pm UTC](https://forum.inductiveautomation.com/t/a-boolean-tag-to-trigger-the-alarm-on-the-rising-edge/72551/3 "2023-04-18T19:14:08Z")

</div>

Why not use bit state ?  
 ![image](https://us1.discourse-cdn.com/inductiveautomation/original/3X/e/b/ebb009c55a49ea843af14d0da076275330891429.png)