Reference

OpcNonExclusiveRateOfChangeAlarmNode Class

Namespace

Opc.UaFx

Assembly

Opc.UaFx.Advanced.dll

Package

Opc.UaFx.Advanced v2.59.0

Members

OpcNonExclusiveRateOfChangeAlarmNode Members

Defines a limit alarm which utilizes one or more non-exclusive states using a rate of change.

Syntax

[OpcEventType(typeof(OpcNonExclusiveRateOfChangeAlarm))]
[OpcNodeType(10214)]
public class OpcNonExclusiveRateOfChangeAlarmNode : OpcNonExclusiveLimitAlarmNode

<OpcEventType(GetType(OpcNonExclusiveRateOfChangeAlarm))>
<OpcNodeType(10214)>
Public Class OpcNonExclusiveRateOfChangeAlarmNode
    Inherits OpcNonExclusiveLimitAlarmNode

Inheritance

Object → OpcNode → OpcInstanceNode → OpcObjectNode → OpcEventNode → OpcConditionNode → OpcAcknowledgeableConditionNode → OpcAlarmConditionNode → OpcLimitAlarmNode → OpcNonExclusiveLimitAlarmNode → OpcNonExclusiveRateOfChangeAlarmNode

Implements

• IOpcNode
• IOpcNodeInfo

Remarks

If for example both the IsHigh and IsHighHigh states need to be maintained as active at the same time this alarm should be used.

A rate of change alarm is commonly used to report an unusual change or lack of change in a measured value related to the speed at which the value has changed. The rate of change alarm becomes active when the rate at which the value changes exceeds or drops below a defined limit.

A rate of change is measured in some time unit, such as seconds or minutes and some unit of measure such as percent or meter. For example a tank may have a high limit for the rate of change of its level (measured in meters) which would be 4 meters per minute. If the tank level changes at a rate that is greater than 4 meters per minute then the high sub state is entered.

Constructors

Name	Description
OpcNonExclusiveRateOfChangeAlarmNode10 overloads	Initializes a new instance of the OpcNonExclusiveRateOfChangeAlarmNode class accessible by the name specified.

Properties

Name	Description
DefaultTypeDefinitionIdprotected · override	Gets the default identifier which identifies the node that defines the underlying node type from that this OpcInstanceNode has been created.

Methods

Name	Description
CreateBranchCoreprotected · override	Creates a new instance of the OpcNonExclusiveRateOfChangeAlarmNode using the same Id and Name as this node.

Inherits members from OpcNonExclusiveLimitAlarmNode, OpcLimitAlarmNode, OpcAlarmConditionNode, OpcAcknowledgeableConditionNode, OpcConditionNode, OpcEventNode, OpcObjectNode, OpcInstanceNode, OpcNode.

Extension methods

Name	Description
OpcAcknowledgeableConditionNodeExtension.Acknowledge	Acknowledges an event notification which can be identified by the EventId of the conditionNode specified there the IsAckedNode is equals to its false state using the further specified client.
OpcAcknowledgeableConditionNodeExtension.Confirm	Confirms an event notification which can be identified by the EventId of the conditionNode specified there the IsConfirmedNode is equals to its false state using the further specified client.
OpcConditionNodeExtension.AddComment	Applies a comment to the state reported by an event notification which can be identified by the EventId of the conditionNode specified using the further specified client.
OpcConditionNodeExtension.ChangeComment	Changes the condition 'Comment' state of the conditionNode specified using the further specified context without raising change events.
OpcConditionNodeExtension.ChangeIsAcked	Changes the condition 'Acked' state of the conditionNode specified using the further specified context without raising change events.
OpcConditionNodeExtension.ChangeIsActive	Changes the condition 'Active' state of the conditionNode specified using the further specified context without raising change events.
OpcConditionNodeExtension.ChangeIsConfirmed	Changes the condition 'Confirmed' state of the conditionNode specified using the further specified context without raising change events.
OpcConditionNodeExtension.ChangeIsEnabled	Changes the condition 'Enabled' state of the conditionNode specified using the further specified context without raising change events.
OpcConditionNodeExtension.ChangeIsSuppressed	Changes the condition 'Suppressed' state of the conditionNode specified using the further specified context without raising change events.
OpcConditionNodeExtension.ChangeLimitState	Changes the condition current limit alarm state of the conditionNode specified using the further specified context.
OpcConditionNodeExtension.ChangeSeverity	Changes the condition 'Severity' of the conditionNode specified using the further specified context without raising change events.
OpcConditionNodeExtension.ChangeShelving	Changes the condition 'Shelving' of the conditionNode specified using the further specified context.
OpcConditionNodeExtension.Disable	Changes the condition state to 'Disabled' of the conditionNode specified using the further specified client.
OpcConditionNodeExtension.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