# OpcAlarmConditionNode Class

<dl class="api-definition">
<dt>Namespace</dt>
<dd><a href="../namespaces/opc.uafx">Opc.UaFx</a></dd>
<dt>Assembly</dt>
<dd>Opc.UaFx.Advanced.dll</dd>
<dt>Package</dt>
<dd>Opc.UaFx.Advanced v2.59.0</dd>
<dt>Members</dt>
<dd><a href="./members">OpcAlarmConditionNode Members</a></dd>
</dl>

Defines an acknowledgeable condition node which introduces additional states to define active, suppressed and shelving alarm conditions.

## Syntax

<div class="api-signature" data-lang="csharp">

```csharp
[OpcNodeType(2915)]
public class OpcAlarmConditionNode : OpcAcknowledgeableConditionNode
```

</div>

<div class="api-signature" data-lang="vbnet">

```vbnet
<OpcEventType(GetType(OpcAlarmCondition))>
<OpcNodeType(2915)>
Public Class OpcAlarmConditionNode
    Inherits OpcAcknowledgeableConditionNode
```

</div>

## Inheritance

[Object](https://learn.microsoft.com/dotnet/api/system.object) → [OpcNode](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnode/) → [OpcInstanceNode](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcinstancenode/) → [OpcObjectNode](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcobjectnode/) → [OpcEventNode](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opceventnode/) → [OpcConditionNode](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcconditionnode/) → [OpcAcknowledgeableConditionNode](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcacknowledgeableconditionnode/) → **OpcAlarmConditionNode**

## Implements

<ul class="api-implements">
<li><a href="../opc.uafx.iopcnode/">IOpcNode</a></li>
<li><a href="../opc.uafx.iopcnodeinfo/">IOpcNodeInfo</a></li>
</ul>

## Derived types

- [OpcDiscreteAlarmNode](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcdiscretealarmnode/)
- [OpcLimitAlarmNode](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opclimitalarmnode/)

## Constructors

| Name | Description |
|---|---|
| [OpcAlarmConditionNode](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcalarmconditionnode/members#opcalarmconditionnode)<span class="api-meta">10 overloads</span> | Initializes a new instance of the OpcAlarmConditionNode class accessible by the `name` specified. |

## Properties

| Name | Description |
|---|---|
| [DefaultTypeDefinitionId](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcalarmconditionnode/members#defaulttypedefinitionid)<span class="api-meta">protected · override</span> | Gets the default identifier which identifies the node that defines the underlying node type from that this [OpcInstanceNode](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcinstancenode/) has been created. |
| [InputNodeId](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcalarmconditionnode/members#inputnodeid) | Gets or sets an identifier which represents the node identifier of the variable the value of which is used as primary input in the calculation of the alarm state. |
| [InputNodeIdNode](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcalarmconditionnode/members#inputnodeidnode) | Gets the [OpcNodeIdPropertyNode](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnodeidpropertynode/) of the [InputNodeId](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcalarmconditionnode/members#inputnodeid) property. |
| [IsActive](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcalarmconditionnode/members#isactive) | Gets a value indicating whether the alarm situation represented currently exists. |
| [IsActiveNode](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcalarmconditionnode/members#isactivenode) | Gets the [OpcTwoStateVariableNode](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opctwostatevariablenode/) of the [IsActive](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcalarmconditionnode/members#isactive) property. |
| [IsSuppressed](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcalarmconditionnode/members#issuppressed) | Gets a value indicating whether the alarm is suppressed due to system specific reasons. |
| [IsSuppressedNode](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcalarmconditionnode/members#issuppressednode) | Gets the [OpcTwoStateVariableNode](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opctwostatevariablenode/) of the [IsSuppressed](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcalarmconditionnode/members#issuppressed) property. |
| [IsSuppressedOrShelved](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcalarmconditionnode/members#issuppressedorshelved) | Gets a value indicating whether the alarm is either in the [IsSuppressed](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcalarmconditionnode/members#issuppressed) or [Shelving](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcalarmconditionnode/members#shelving). |
| [IsSuppressedOrShelvedNode](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcalarmconditionnode/members#issuppressedorshelvednode) | Gets the [OpcPropertyNode&lt;T&gt;](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcpropertynode-1/) of the [IsSuppressedOrShelved](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcalarmconditionnode/members#issuppressedorshelved) property. |
| [MaxTimeShelved](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcalarmconditionnode/members#maxtimeshelved) | Gets or sets the maximum time that the alarm condition may be shelved. |
| [MaxTimeShelvedNode](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcalarmconditionnode/members#maxtimeshelvednode) | Gets the [OpcPropertyNode&lt;T&gt;](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcpropertynode-1/) of the [MaxTimeShelved](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcalarmconditionnode/members#maxtimeshelved) property. |
| [OneShotShelveCallback](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcalarmconditionnode/members#oneshotshelvecallback) | Gets or sets a callback used to shelve the condition node once. |
| [Shelving](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcalarmconditionnode/members#shelving) | Gets a node which is used to suggest whether an alarm shall (temporarily) be prevented from being displayed to the user. |
| [TimedShelveCallback](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcalarmconditionnode/members#timedshelvecallback) | Gets or sets a callback used to shelve the condition node for a specific amount of time. |
| [TimedUnshelveCallback](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcalarmconditionnode/members#timedunshelvecallback) | Gets or sets a callback used to unshelve the condition node after a specific amount of time being shelved. |
| [UnshelveCallback](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcalarmconditionnode/members#unshelvecallback) | Gets or sets a callback used to unshelve the condition node. |

## Methods

| Name | Description |
|---|---|
| [CreateBranchCore](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcalarmconditionnode/members#createbranchcore)<span class="api-meta">protected · override</span> | Creates a new instance of the OpcAlarmConditionNode using the same [Id](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnode/members#id) and [Name](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnode/members#name) as this node. |
| [OneShotShelveCore](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcalarmconditionnode/members#oneshotshelvecore)<span class="api-meta">protected · virtual</span> | Shelves a condition node once using the `context` specified. |
| [TimedShelveCore](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcalarmconditionnode/members#timedshelvecore)<span class="api-meta">protected · virtual</span> | Shelves a condition node using the `context` and `duration` information specified. |
| [TimedUnshelveCore](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcalarmconditionnode/members#timedunshelvecore)<span class="api-meta">protected · virtual</span> | Unshelves a condition node using the `context` specified after being shelved for a specific amount of time. |
| [UnshelveCore](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcalarmconditionnode/members#unshelvecore)<span class="api-meta">protected · virtual</span> | Unshelves a condition node using the `context` specified. |

Inherits members from [OpcAcknowledgeableConditionNode](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcacknowledgeableconditionnode/members), [OpcConditionNode](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcconditionnode/members), [OpcEventNode](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opceventnode/members), [OpcObjectNode](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcobjectnode/members), [OpcInstanceNode](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcinstancenode/members), [OpcNode](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnode/members).

## Extension methods

| Name | Description |
|---|---|
| [OpcAcknowledgeableConditionNodeExtension.Acknowledge](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.client.opcacknowledgeableconditionnodeextension/members#acknowledge) | Acknowledges an event notification which can be identified by the [EventId](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opceventnode/members#eventid) of the `conditionNode` specified there the [IsAckedNode](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcacknowledgeableconditionnode/members#isackednode) is equals to its false state using the further specified `client`. |
| [OpcAcknowledgeableConditionNodeExtension.Confirm](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.client.opcacknowledgeableconditionnodeextension/members#confirm) | Confirms an event notification which can be identified by the [EventId](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opceventnode/members#eventid) of the `conditionNode` specified there the [IsConfirmedNode](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcacknowledgeableconditionnode/members#isconfirmednode) is equals to its false state using the further specified `client`. |
| [OpcConditionNodeExtension.AddComment](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.client.opcconditionnodeextension/members#addcomment) | Applies a comment to the state reported by an event notification which can be identified by the [EventId](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opceventnode/members#eventid) of the `conditionNode` specified using the further specified `client`. |
| [OpcConditionNodeExtension.ChangeComment](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.server.opcconditionnodeextension/members#changecomment) | Changes the condition 'Comment' state of the `conditionNode` specified using the further specified `context` without raising change events. |
| [OpcConditionNodeExtension.ChangeIsAcked](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.server.opcconditionnodeextension/members#changeisacked) | Changes the condition 'Acked' state of the `conditionNode` specified using the further specified `context` without raising change events. |
| [OpcConditionNodeExtension.ChangeIsActive](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.server.opcconditionnodeextension/members#changeisactive) | Changes the condition 'Active' state of the `conditionNode` specified using the further specified `context` without raising change events. |
| [OpcConditionNodeExtension.ChangeIsConfirmed](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.server.opcconditionnodeextension/members#changeisconfirmed) | Changes the condition 'Confirmed' state of the `conditionNode` specified using the further specified `context` without raising change events. |
| [OpcConditionNodeExtension.ChangeIsEnabled](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.server.opcconditionnodeextension/members#changeisenabled) | Changes the condition 'Enabled' state of the `conditionNode` specified using the further specified `context` without raising change events. |
| [OpcConditionNodeExtension.ChangeIsSuppressed](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.server.opcconditionnodeextension/members#changeissuppressed) | Changes the condition 'Suppressed' state of the `conditionNode` specified using the further specified `context` without raising change events. |
| [OpcConditionNodeExtension.ChangeSeverity](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.server.opcconditionnodeextension/members#changeseverity) | Changes the condition 'Severity' of the `conditionNode` specified using the further specified `context` without raising change events. |
| [OpcConditionNodeExtension.ChangeShelving](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.server.opcconditionnodeextension/members#changeshelving) | Changes the condition 'Shelving' of the `conditionNode` specified using the further specified `context`. |
| [OpcConditionNodeExtension.Disable](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.client.opcconditionnodeextension/members#disable) | Changes the condition state to 'Disabled' of the `conditionNode` specified using the further specified `client`. |
| [OpcConditionNodeExtension.Enable](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.client.opcconditionnodeextension/members#enable) | Changes the condition state to 'Enabled' of the `conditionNode` specified using the further specified `client`. |

## Applies to

| Package | Versions |
|---|---|
| Opc.UaFx.Advanced | v2.5–v2.59 |