# How acknowledge an opcua alarm

**URL:** <https://discourse.nodered.org/t/how-acknowledge-an-opcua-alarm/50278>\
**Category:** General\
**Created:** [27 August 2021 14:13 UTC](https://discourse.nodered.org/t/how-acknowledge-an-opcua-alarm/50278 "2021-08-27T14:13:44Z")\
**Posts on this page:** 4\
**Page:** 1

<div class="post-metadata">

**Author:** ![oualid](https://avatars.discourse-cdn.com/v4/letter/o/8dc957/32.png) [@oualid](https://discourse.nodered.org/u/oualid)\
**Post date:** [27 August 2021 14:13 UTC](https://discourse.nodered.org/t/how-acknowledge-an-opcua-alarm/50278/1 "2021-08-27T14:13:44Z")

</div>

hi,  
Since yesterday i am looking for how acknowledge an opcua alarm using the node opcu ua methode.  
in fact, i have create an `opc ua server` with ` java script` from witch i generate an alarms and from node-red side, i create a flow witch catch the generated alarms and display them in ui template.  
Now, i want to acknowledge the alarms using the node opcua methode.  
i know that `ObjectId = ConditionId , MethodId = NodeId of the Acknowlegde Method on the _AcknowledgeableConditionType - this is a well known NodeId defined by OPC and InputArgument[0] = EventId` but when i execute the node opcu methode, the node generate an empty msg payload and the alarm remain Unacknowledged.  
please find the details on the below screen shot

 ![Untitled1](https://us1.discourse-cdn.com/flex026/uploads/nodered/original/3X/4/7/47c0b5053227706c75fd4a24dd2f6e90f1d80852.png)  
 ![Untitled2](https://us1.discourse-cdn.com/flex026/uploads/nodered/original/3X/3/2/328fd6919b152d068dc32beab608eed840611849.png)  
 ![Untitled3](https://us1.discourse-cdn.com/flex026/uploads/nodered/original/3X/b/5/b564430830139a65ef66735042c7faf4b325cab8.png)

thank you for help

---

<div class="post-metadata">

**Author:** ![oualid](https://avatars.discourse-cdn.com/v4/letter/o/8dc957/32.png) [@oualid](https://discourse.nodered.org/u/oualid)\
**Post date:** [21 September 2021 14:43 UTC](https://discourse.nodered.org/t/how-acknowledge-an-opcua-alarm/50278/2 "2021-09-21T14:43:00Z")

</div>

problem resolved

---

<div class="post-metadata">

**Author:** ![Steve-Mcl](https://sea2.discourse-cdn.com/flex026/user_avatar/discourse.nodered.org/steve-mcl/32/4826_2.png) [@Steve-Mcl](https://discourse.nodered.org/u/Steve-Mcl)\
**Post date:** [21 September 2021 15:00 UTC](https://discourse.nodered.org/t/how-acknowledge-an-opcua-alarm/50278/3 "2021-09-21T15:00:44Z")

</div>

Could you share your solution for the benefit of future readers facing the same issue?

---

<div class="post-metadata">

**Author:** ![system](https://us1.discourse-cdn.com/flex026/uploads/nodered/original/1X/d073cd938eafa2e558d7c2cd59003b3ef4963033.png) [@system](https://discourse.nodered.org/u/system)\
**Post date:** [5 October 2021 15:01 UTC](https://discourse.nodered.org/t/how-acknowledge-an-opcua-alarm/50278/4 "2021-10-05T15:01:02Z")

</div>

This topic was automatically closed 14 days after the last reply. New replies are no longer allowed.