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95 result(s) for Alarm

• OPC-10000-1 – OPC Unified Architecture - Part 1: Overview and Concepts
  2.1.3 Alarm
  Alarm type of Event associated with a state condition that typically requires acknowledgement Note 1 to entry: See OPC 10000-9 for a description of Alarms
• OPC-10000-1 – OPC Unified Architecture - Part 1: Overview and Concepts
  6.9 MonitoredItem Service Set
  value or status; Attributes for a change in value; and EventNotifiers for newly generated Alarm and Event reports. Each MonitoredItem identifies the item to monitor and the Subscription
• OPC-10000-2 – OPC Unified Architecture - Part 2: Security Model
  6.9 Alarm related guidance
  Alarm related guidance OPC UA supports a robust Alarm and Condition information model which includes the ability to disable alarms, shelve alarms, and to generally manage alarms. Alarm processing ... restricted to personnel with appropriate access rights. Furthermore, any action that disables an alarm, whether it be initiated by personnel or some automated system, should generate an Audit Event indicating
• OPC-10000-9 – OPC Unified Architecture - Part 9: Alarms & Conditions
  3.1.1 Acknowledge
  Acknowledge Operator action that confirms recognition of an Alarm Note 1 to entry: This definition is copied from ISA 18.2 / IEC 62682 . The term "Accept" is another common
• OPC-10000-9 – OPC Unified Architecture - Part 9: Alarms & Conditions
  3.1.2 Active
  Active alarm state in which the alarm condition is true Note 1 to entry: This definition is copied from ISA 18.2 / IEC 62682 . Note 2 to entry: Other common terms ... defined by EEMUA Publication 191 are "Standing" for an Active Alarm and "Cleared" when the Condition has returned to normal and is no longer Active
• OPC-10000-9 – OPC Unified Architecture - Part 9: Alarms & Conditions
  3.1.3 AdaptiveAlarm
  AdaptiveAlarm Alarm for which the setpoint or limits are changed by an algorithm. Note 1 to entry:  AdaptiveAlarms are alarms that are adjusted automatically by algorithms. These algorithms might detect
• OPC-10000-9 – OPC Unified Architecture - Part 9: Alarms & Conditions
  3.1.6 AlarmSuppressionGroup
  instance of an AlarmGroupType that is used to suppress other Alarms . If any Alarm in the group is active, then the AlarmSuppressionGroup is active. If all Alarms in the AlarmSuppressionGroup ... inactive then the AlarmSuppressionGroup is inactive. Note 2 to entry: The Alarm to be affected references AlarmSuppressionGroups with a HasAlarmSuppressionGroup ReferenceType
• OPC-10000-9 – OPC Unified Architecture - Part 9: Alarms & Conditions
  3.1.10 Confirm
  Server that a corrective action has been taken to address the cause of the Alarm
• OPC-10000-9 – OPC Unified Architecture - Part 9: Alarms & Conditions
  3.1.11 Disable
  Disable system is configured such that the Alarm will not be generated even though the base Alarm Condition is present Note 1 to entry:  This definition is copied from EEMUA
• OPC-10000-9 – OPC Unified Architecture - Part 9: Alarms & Conditions
  3.1.17 Retain
  Retain Alarm in a state that is interesting for a Client wishing to synchronize its state of Conditions with the Server 's state
• OPC-10000-9 – OPC Unified Architecture - Part 9: Alarms & Conditions
  3.1.18 Shelving
  Shelving facility where the Operator is able to temporarily prevent an Alarm from being displayed to the Operator when it is causing the Operator a nuisance Note 1 to entry ... Shelved Alarm will be removed from the list and will not re-annunciate until un-shelved." as defined in EEMUA Publication
• OPC-10000-9 – OPC Unified Architecture - Part 9: Alarms & Conditions
  3.1.19 Suppress
  Suppress act of determining whether an Alarm should not occur Note 1 to entry: "An Alarm is suppressed when logical criteria are applied to determine that the Alarm should ... occur, even though the base Alarm Condition (e.g. Alarm setting exceeded) is present" as defined in EEMUA. In IEC 62682 Suppressed Alarms are also described as being "Suppressed
• OPC-10000-9 – OPC Unified Architecture - Part 9: Alarms & Conditions
  4.3 Acknowledgeable Conditions
  change to the state depend on a Server's implementation. For example, in typical Alarm models the change is limited to a transition to the Active state or transitions within ... Condition that requires a confirmation. For example, a motor start event is not an alarm, just an action that is to be acknowledged by the operator. It could also
• OPC-10000-9 – OPC Unified Architecture - Part 9: Alarms & Conditions
  4.5 Condition state synchronization
  display the current status of Alarms and Conditions (known as a "current Alarm display") would use the following logic to process Refresh Event Notifications . The Client flags
• OPC-10000-9 – OPC Unified Architecture - Part 9: Alarms & Conditions
  4.6 Severity, quality, and comment
  indicates the urgency of the Condition and is also commonly called alarm priority or 'priority', especially in relation to Alarms in the ProcessConditionClassType . Severity is defined to have a range ... range for Alarms should be further subdivided based on the severity of the Alarm . For an example of how Severity ranges are subdivided for diagnostics see 10000-26 LogRecord Severity
• OPC-10000-9 – OPC Unified Architecture - Part 9: Alarms & Conditions
  4.8 Alarms
  Figure 5 . The complete model with all states is defined in 5.8 . Figure 5 - Alarm state machine model An Alarm in the Active state indicates that the situation the Condition ... representing currently exists. When an Alarm is an inactive state it is representing a situation that has returned to a normal state. Some Alarm subtypes introduce sub-states
• OPC-10000-9 – OPC Unified Architecture - Part 9: Alarms & Conditions
  4.9 Multiple active states
  some cases, it is desirable to further define the Active state of an Alarm by providing a sub-state machine for the Active State. For example, a multi-state level ... Alarm when in the Active state may be in one of the following sub-states: LowLow, Low, High or HighHigh. The state model is illustrated in Figure 7 . Figure
• OPC-10000-9 – OPC Unified Architecture - Part 9: Alarms & Conditions
  4.10 Condition instances in the AddressSpace
  them. For example, a temperature transmitter that has a built-in high temperature Alarm would appear in the AddressSpace as an instance of some temperature transmitter Object with a HasComponent
• OPC-10000-9 – OPC Unified Architecture - Part 9: Alarms & Conditions
  4.11 Alarm and Condition auditing
  Alarm and Condition auditing The OPC UA Standards include provisions for auditing. Auditing is an important security and tracking concept. Audit records provide the "Who", "When ... information regarding user interactions with a system. These audit records are especially important when Alarm management is considered. Alarms are the typical instrument for providing information to a user that
• OPC-10000-9 – OPC Unified Architecture - Part 9: Alarms & Conditions
  4.12 Alarms in a system
  system, alarms might be managed at different levels and by different applications. An alarm might be detected in an instrument, but the full alarm model for that alarm instance might ... where the instrument is restarted or the UA Server that is acting as an alarm server is restarted. It is desirable that the state of alarms is maintained and that
• OPC-10000-9 – OPC Unified Architecture - Part 9: Alarms & Conditions
  5.1 General
  General The Alarm and Condition model extends the OPC UA base Event model by defining various Event Types based on the BaseEventType . All of the Event Types defined in this ... document can be further extended from domain to Server specific Alarm and Condition Types . Instances of Alarm and Condition Types may be optionally exposed in the AddressSpace in order
• OPC-10000-9 – OPC Unified Architecture - Part 9: Alarms & Conditions
  5.2 Two-state state machines
  High and HighHigh, then the TransitionTime stays at the point in time where the Alarm became active whereas the EffectiveTransitionTime changes with each shift of a sub state. The optional
• OPC-10000-9 – OPC Unified Architecture - Part 9: Alarms & Conditions
  5.4.1 General
  This includes extending TwoStateVariableType state machines with sub states and the addition of Alarm grouping. TwoStateVariableTypes can be extended with subordinate state machines in a similar fashion to the StateMachineType
• OPC-10000-9 – OPC Unified Architecture - Part 9: Alarms & Conditions
  5.4.4 HasAlarmSuppressionGroup ReferenceType
  AddressSpace is specified in Table 5 This ReferenceType binds an AlarmSuppressionGroup to an Alarm . The SourceNode of the Reference shall be an instance of an AlarmConditionType or sub type
• OPC-10000-9 – OPC Unified Architecture - Part 9: Alarms & Conditions
  5.4.5 AlarmGroupMember ReferenceType
  subtype of the Organizes Reference Type. This ReferenceType is used to indicate the Alarm instances that are part of an Alarm Group . The representation in the AddressSpace is specified ... BrowseName Comment ConformanceUnits A & C Suppression Group A & C First in Group Alarm
• OPC-10000-9 – OPC Unified Architecture - Part 9: Alarms & Conditions
  5.4.6 AlarmSuppressionGroupMember ReferenceType
  AlarmSuppressionGroupMember ReferenceType The Alarm Suppression GroupMember ReferenceType is a concrete ReferenceType that can be used directly. It is a subtype of the AlarmGroupMember ReferenceType . This ReferenceType is used to indicate ... Alarm instances or Boolean Variables that are part of an Alarm Group . The representation in the AddressSpace is specified in Table 7 The SourceNode of the Reference shall
• OPC-10000-9 – OPC Unified Architecture - Part 9: Alarms & Conditions
  5.5.2 ConditionType
  Condition is associated with, it may be the same as the InputNode for an Alarm , but it may be a separate node. For example, a motor, which is a Variable ... sensor associated with the motor. In the former the InputNode for the High RPM Alarm is the value of the Motor RPM, while in the later the InputNode
• OPC-10000-9 – OPC Unified Architecture - Part 9: Alarms & Conditions
  5.5.7 ConditionRefresh Method
  regenerated Event might contain some updated Property/ Variable values. For example, if the Alarm limits associated with a Variable were changed after the generation of the Event without generating ... change in the Alarm state, the new limit could be reported. In another example, if the HighLimit was 100 and the Variable is 120. If the limit were changed
• OPC-10000-9 – OPC Unified Architecture - Part 9: Alarms & Conditions
  5.5.8 ConditionRefresh2 Method
  regenerated Event might contain some updated Property/ Variable values. For example, if the Alarm limits associated with a Variable were changed after the generation of the Event without generating ... change in the Alarm state, the new limit could be reported. In another example, if the HighLimit was 100 and the Variable is 120. If the limit were changed
• OPC-10000-9 – OPC Unified Architecture - Part 9: Alarms & Conditions
  5.8.2 AlarmConditionType
  SuppressedState and ShelvingState . It also adds the ability to set a delay time, re-alarm time, Alarm groups and audible Alarm settings. The Alarm model is illustrated in Figure ... complete definition. It is formally defined in Table 40 and Table 41 . Figure 15 - Alarm Model Table 40 - AlarmConditionType definition Attribute Value BrowseName AlarmConditionType IsAbstract False References Node Class BrowseName
• OPC-10000-9 – OPC Unified Architecture - Part 9: Alarms & Conditions
  5.8.3 AlarmGroupType
  AlarmGroupType provides a simple manner of grouping Alarms . This grouping can be used for Alarm suppression or for identifying related Alarms . The actual usage of the AlarmGroupType is specified where ... AlarmGroupMember Object <AlarmConditionInstance> AlarmConditionType OptionalPlaceholder ConformanceUnits A & C First in Group Alarm A & C Suppression Group The instance of an AlarmGroupType should be given a name
• OPC-10000-9 – OPC Unified Architecture - Part 9: Alarms & Conditions
  5.8.4 AlarmSuppressionGroupType
  Variable can be thought of as representing the Id of the ActiveState of an Alarm , i.e. when any of the included Variables have a value of true the AlarmSuppressionGroup ... AlarmSuppressionGroupType should be given a name and description that describes the purpose of the Alarm group. The AlarmSuppressionGroupType instance will contain a list of instances of AlarmConditionType or sub type
• OPC-10000-9 – OPC Unified Architecture - Part 9: Alarms & Conditions
  5.8.5 Reset Method
  Reset Method The Reset Method is used reset a latched Alarm instance. It is only available on an instance of an AlarmConditionType that exposes the LatchedState . Normally, the NodeId ... general description of this result code. Bad_InvalidState The Alarm instance was not latched or is still active or still requires acknowledgement / confirmation. To reset an Alarm instance shall have
• OPC-10000-9 – OPC Unified Architecture - Part 9: Alarms & Conditions
  5.8.6 Reset2 Method
  general description of this result code. Bad_InvalidState The Alarm instance was not latched or is still active or still requires acknowledgement / confirmation. To reset an Alarm Instance it shall ... have been in Alarm , and returned to normal and have been acknowledged/confirmed prior to being reset. Bad_InvalidArgument The Comment string provided exceeds the allowed length for the comment
• OPC-10000-9 – OPC Unified Architecture - Part 9: Alarms & Conditions
  5.8.7 Silence Method
  Silence Method The Silence Method is used silence a specific Alarm instance. It is only available on an instance of an AlarmConditionType that also exposes the SilenceState . Normally, the NodeId
• OPC-10000-9 – OPC Unified Architecture - Part 9: Alarms & Conditions
  5.8.8 Suppress Method
  Suppress Method The Suppress Method is used to suppress a specific Alarm instance. It is only available on an instance of an AlarmConditionType that also exposes the SuppressedState . This Method ... used to change the SuppressedState of an Alarm and overwrite any suppression caused by an associated AlarmSuppressionGroup . This Method works in parallel with any suppression triggered by an AlarmSuppressionGroup
• OPC-10000-9 – OPC Unified Architecture - Part 9: Alarms & Conditions
  5.8.10 Unsuppress Method
  Unsuppress Method The Unsuppress Method is used to clear the SuppressedState of a specific Alarm instance. It is only available on an instance of an AlarmConditionType that also exposes ... AlarmSuppressionGroup, in that if the Method is used to clear the SuppressedState of an Alarm , any change in an AlarmSuppressionGroup might again suppress the Alarm . Normally, the NodeId
• OPC-10000-9 – OPC Unified Architecture - Part 9: Alarms & Conditions
  5.8.11 Unsuppress2 Method
  empty text with a locale shall be provided. Unsuppress2 Method applies to an Alarm instance, even if it is not currently active. Method Result Codes in Table 56 (defined
• OPC-10000-9 – OPC Unified Architecture - Part 9: Alarms & Conditions
  5.8.12 RemoveFromService Method
  RemoveFromService Method The RemoveFromService Method is used to suppress a specific Alarm instance. It is only available on an instance of an AlarmConditionType that also exposes the OutOfServiceState . Normally ... expose the OutOfServiceState shall reject RemoveFromService calls. RemoveFromService Method applies to an Alarm instance, even if it is not currently in the Active State . Table 62 specifies the AddressSpace representation
• OPC-10000-9 – OPC Unified Architecture - Part 9: Alarms & Conditions
  5.8.13 RemoveFromService2 Method
  expose the OutOfServiceState shall reject RemoveFromService2 calls. RemoveFromService2 Method applies to an Alarm instance, even if it is not currently in the Active State . Table 65 specifies the AddressSpace representation
• OPC-10000-9 – OPC Unified Architecture - Part 9: Alarms & Conditions
  5.8.14 PlaceInService Method
  PlaceInService Method is used to set the OutOfServiceState to False of a specific Alarm instance. It is only available on an instance of an AlarmConditionType that also exposes the OutOfServiceState ... general description of this result code. Comments The PlaceInService Method applies to an Alarm instance, even if it is not currently in the Active State . Table 67 specifies the AddressSpace
• OPC-10000-9 – OPC Unified Architecture - Part 9: Alarms & Conditions
  5.8.15 PlaceInService2 Method
  invalid in some other manner. Comments The PlaceInService2 Method applies to an Alarm instance, even if it is not currently in the Active State . Table 70 specifies the AddressSpace representation
• OPC-10000-9 – OPC Unified Architecture - Part 9: Alarms & Conditions
  5.8.16 GetGroupMemberships Method
  Method The GetGroupMemberships Method is used to find the list of AlarmGroups that this alarm is in. Signature GetGroupMemberships( [out] NodeId[] Group ); Method result codes in Table 71 (defined ... general description of this result code. Comments The GetGroupMemberships Method applies to an Alarm instance, even if it is not currently in the Active State . Table 72 specifies the AddressSpace
• OPC-10000-9 – OPC Unified Architecture - Part 9: Alarms & Conditions
  5.8.17.1 Overview
  Overview The ShelvedStateMachineType defines a sub-state machine that represents an advanced Alarm filtering model. This model is illustrated in Figure 17 . The state model supports two types of Shelving ... states. Shelving is an Operator initiated activity. In OneShotShelving , a user requests that an Alarm be Shelved for its current Active state or if not Active its next Active state
• OPC-10000-9 – OPC Unified Architecture - Part 9: Alarms & Conditions
  5.8.17.4 TimedShelve Method
  even if it is not active. The timer will start on Method invocation. The Alarm may go active and inactive multiple times during this Duration , but it will remain shelved ... TimedShelve parameters Argument Description ShelvingTime Specifies a fixed time for which to shelve the Alarm . The Server may refuse the provided duration. If a MaxTimeShelved Property exist on the Alarm
• OPC-10000-9 – OPC Unified Architecture - Part 9: Alarms & Conditions
  5.8.17.5 TimedShelve2 Method
  TimedShelve2 parameters Argument Description ShelvingTime Specifies a fixed time for which to shelve the Alarm . The Server may refuse the provided duration. If a MaxTimeShelved Property exist on the Alarm ... Description Bad_ConditionAlreadyShelved See Table 137 for the description of this result code. The Alarm is already in TimedShelved state and the system does not allow a reset
• OPC-10000-9 – OPC Unified Architecture - Part 9: Alarms & Conditions
  5.8.17.6 OneShotShelve Method
  Description Bad_ConditionAlreadyShelved See Table 137 for the description of this result code. The Alarm is already in OneShotShelved state. Table 88 specifies the AddressSpace representation for the OneShotShelve Method
• OPC-10000-9 – OPC Unified Architecture - Part 9: Alarms & Conditions
  5.8.17.7 OneShotShelve2 Method
  Description Bad_ConditionAlreadyShelved See Table 137 for the description of this result code. The Alarm is already in OneShotShelved state. Bad_InvalidArgument The Comment string provided exceeds the allowed length
• OPC-10000-9 – OPC Unified Architecture - Part 9: Alarms & Conditions
  5.8.18 LimitAlarmType
  Limit Four optional limits are defined that configure the states of the derived limit Alarm Types. These Properties shall be set for any Alarm limits that are exposed ... derived limit Alarm types. These Properties are listed as optional but at least one is required. For cases where an underlying system cannot provide the actual value of a limit
• OPC-10000-9 – OPC Unified Architecture - Part 9: Alarms & Conditions
  5.8.19.1 Overview
  Overview This clause describes the state machine and the base Alarm Type behaviour for AlarmConditionTypes with multiple mutually exclusive limits
• OPC-10000-9 – OPC Unified Architecture - Part 9: Alarms & Conditions
  5.8.19.2 ExclusiveLimitStateMachineType
  ExclusiveLimitStateMachineType defines the sub state machine that represents the actual level of a multilevel Alarm when it is in the Active state. The sub state machine defined here includes High ... Active state. This Active state could be part of a "level" Alarm or "deviation" Alarm or any other Alarm state machine. The LowLow , Low , High , HighHigh
• OPC-10000-9 – OPC Unified Architecture - Part 9: Alarms & Conditions
  5.8.21.1 Overview
  Overview A level Alarm is commonly used to report when a limit is exceeded. It typically relates to an instrument - e.g. a temperature meter. The level Alarm becomes active when
• OPC-10000-9 – OPC Unified Architecture - Part 9: Alarms & Conditions
  5.8.21.2 NonExclusiveLevelAlarmType
  NonExclusiveLevelAlarmType The NonExclusiveLevelAlarmType is a special level Alarm utilized with one or more non-exclusive states. If for example both the High and HighHigh states need to be maintained
• OPC-10000-9 – OPC Unified Architecture - Part 9: Alarms & Conditions
  5.8.21.3 ExclusiveLevelAlarmType
  ExclusiveLevelAlarmType The ExclusiveLevelAlarmType is a special level Alarm utilized with multiple mutually exclusive limits. It is formally defined in Table 100 . Table 100 - ExclusiveLevelAlarmType definition Attribute Value BrowseName ExclusiveLevelAlarmType IsAbstract
• OPC-10000-9 – OPC Unified Architecture - Part 9: Alarms & Conditions
  5.8.22.1 Overview
  Overview A deviation Alarm is commonly used to report an excess deviation between a desired setpoint level of a process value and an actual measurement of that value. The deviation ... Alarm becomes active when the deviation exceeds or drops below a defined limit. For example, if a setpoint had a value of 10, a high deviation Alarm limit
• OPC-10000-9 – OPC Unified Architecture - Part 9: Alarms & Conditions
  5.8.22.2 NonExclusiveDeviationAlarmType
  NonExclusiveDeviationAlarmType The NonExclusiveDeviationAlarmType is a special level Alarm utilized with one or more non-exclusive states. If for example both the High and HighHigh states need to be maintained ... NodeId of the setpoint used in the deviation calculation. In cases where the Alarm is generated by an underlying system and if the Variable is not in the AddressSpace
• OPC-10000-9 – OPC Unified Architecture - Part 9: Alarms & Conditions
  5.8.23.2 NonExclusiveRateOfChangeAlarmType
  NonExclusiveRateOfChangeAlarmType The NonExclusiveRateOfChangeAlarmType is a special level Alarm utilized with one or more non-exclusive states. If for example both the High and HighHigh states need to be maintained
• OPC-10000-9 – OPC Unified Architecture - Part 9: Alarms & Conditions
  5.8.24.1 DiscreteAlarmType
  DiscreteAlarmType The DiscreteAlarmType is used to classify Types into Alarm Conditions where the input for the Alarm may take on only a certain number of possible values (e.g. True/False, running/stopped/terminating
• OPC-10000-9 – OPC Unified Architecture - Part 9: Alarms & Conditions
  5.8.24.2 OffNormalAlarmType
  type is usually used to indicate that a discrete value is in an Alarm state, it is active as long as a non-normal value is present. Table 106 - OffNormalAlarmType ... InputNode Property is not equal to the value of the NormalState Property the Alarm is Active . If this Variable is not in the AddressSpace , a NULL NodeId shall be provided
• OPC-10000-9 – OPC Unified Architecture - Part 9: Alarms & Conditions
  5.8.24.3 SystemOffNormalAlarmType
  used by a Server to indicate that an underlying system that is providing Alarm information is having a communication problem and that the Server may have invalid or incomplete Condition
• OPC-10000-9 – OPC Unified Architecture - Part 9: Alarms & Conditions
  5.8.24.4 TripAlarmType
  specialization of the OffNormalAlarmType intended to represent an equipment trip Condition . The Alarm becomes active when the monitored piece of equipment experiences some abnormal fault such as a motor shutting
• OPC-10000-9 – OPC Unified Architecture - Part 9: Alarms & Conditions
  5.8.24.5 InstrumentDiagnosticAlarmType
  specialization of the OffNormalAlarmType intended to represent a fault in a field device. The Alarm becomes active when the monitored device experiences a fault such as a sensor failure
• OPC-10000-9 – OPC Unified Architecture - Part 9: Alarms & Conditions
  5.8.24.6 SystemDiagnosticAlarmType
  OffNormalAlarmType intended to represent a fault in a system or sub-system. The Alarm becomes active when the monitored system experiences a fault. It is formally defined in Table
• OPC-10000-9 – OPC Unified Architecture - Part 9: Alarms & Conditions
  5.8.24.7 CertificateExpirationAlarmType
  Server when the Server's Certificate is within the ExpirationLimit of expiration. This Alarm automatically returns to normal when the certificate is updated. Table 111 - CertificateExpirationAlarmType definition Attribute Value BrowseName ... certificate will expire. ExpirationLimit is the time interval before the ExpirationDate at which this Alarm will trigger. This shall be a positive number. If the property is not provided
• OPC-10000-9 – OPC Unified Architecture - Part 9: Alarms & Conditions
  5.8.25 DiscrepancyAlarmType
  value, providing a range that the value can be in without generating the Alarm . A DiscrepancyAlarmType can be used to indicate a motor has not responded to a start request
• OPC-10000-9 – OPC Unified Architecture - Part 9: Alarms & Conditions
  5.9.7 HighlyManagedAlarmConditionClassType
  HighlyManagedAlarmConditionClassType In Alarm systems some Alarms may be classified as HighlyManagedAlarms . This class of Alarm requires special handling that varies according to the individual requirements. It might require individual acknowledgement
• OPC-10000-9 – OPC Unified Architecture - Part 9: Alarms & Conditions
  5.9.9 StatisticalConditionClassType
  generated as part of a statistical analysis. They might be any of an Alarm number of types. Table 120 - StatisticalConditionClassType definition Attribute Value BrowseName StatisticalConditionClassType IsAbstract True References NodeClass BrowseName
• OPC-10000-9 – OPC Unified Architecture - Part 9: Alarms & Conditions
  5.9.10 TestingConditionClassType
  TestingConditionClassType The TestingConditionClassType is used to classify Conditions related to testing of an Alarm system or Alarm function. It is formally defined in Table 121 . Testing Conditions might include ... condition to test an alarm annunciation such as a horn or other panel. It might also be used to temporarily reclassify a Condition to check response times or suppression logic
• OPC-10000-9 – OPC Unified Architecture - Part 9: Alarms & Conditions
  5.10.8 AuditConditionShelvingEventType
  TimedShelve operation, the ShelvingTime field shall contain duration for which to shelve the Alarm . For other Shelving Methods , this parameter may be omitted or NULL
• OPC-10000-9 – OPC Unified Architecture - Part 9: Alarms & Conditions
  5.10.9 AuditConditionSuppressionEventType
  InstanceDeclarations of that Node. ConformanceUnits A & C Suppression Auditing This Event indicates an Alarm suppression operation. An audit Event of this type shall be generated, if audit events
• OPC-10000-9 – OPC Unified Architecture - Part 9: Alarms & Conditions
  5.10.10 AuditConditionSilenceEventType
  that Node. ConformanceUnits A & C Silencing Auditing This event indicates that an Alarm was silenced, but not acknowledged. An audit event of this type shall be generated, if Audit
• OPC-10000-9 – OPC Unified Architecture - Part 9: Alarms & Conditions
  5.10.11 AuditConditionResetEventType
  that Node. ConformanceUnits A & C Latching Auditing This event indicates that an Alarm was reset. An audit event of this type shall be generated, if Audit events are supported ... Alarm action
• OPC-10000-9 – OPC Unified Architecture - Part 9: Alarms & Conditions
  5.13 Alarm & Condition status codes
  Alarm & Condition status codes Table 137 defines the StatusCodes defined for Alarm & Conditions . Table 137 - Alarm & Condition result codes Symbolic Id Description Bad_ConditionAlreadyEnabled The addressed Condition ... already enabled. Bad_ConditionAlreadyDisabled The addressed Condition is already disabled. Bad_ConditionAlreadyShelved The Alarm is already in a shelved state. Bad_ConditionBranchAlreadyAcked The EventId does not refer to a state
• OPC-10000-9 – OPC Unified Architecture - Part 9: Alarms & Conditions
  5.14.2 Communication problems
  Condition of the SystemOffNormalAlarmType shall be used to report the communication failure to Alarm Clients . The NormalState field shall contain the NodeId of the Variable that indicates the status
• OPC-10000-9 – OPC Unified Architecture - Part 9: Alarms & Conditions
  6.5 Conditions in a VariableType
  case. Note that there is no component relationship for the "LvelMonitoring" Alarm . It is Server -specific whether and where they assign a HasComponent Reference . Figure
• OPC-10000-9 – OPC Unified Architecture - Part 9: Alarms & Conditions
  7.1 Overview
  that can be used by a StateMachine to indicate that a specific Effect on Alarm s caused by the transition of a StateMachine . StateMachines that describe the state
• OPC-10000-9 – OPC Unified Architecture - Part 9: Alarms & Conditions
  7.2 HasEffectDisable
  HasEffect . The semantic of this ReferenceType is to point from a Transition to an Alarm that will be disabled. If the Reference is to an Object then all Alarms ... hierarchy below the Object containing the StateMachine are disabled, If the target is an Alarm instance then the given Alarm instance is disabled. The SourceNode of this ReferenceType shall
• OPC-10000-9 – OPC Unified Architecture - Part 9: Alarms & Conditions
  7.3 HasEffectEnable
  HasEffect . The semantic of this ReferenceType is to point from a Transition to an Alarm that will be enabled. If the Reference is to an Object then all Alarms ... hierarchy below the Object containing the StateMachine are enabled If the target is an Alarm instance then the given Alarm instance is enabled. The SourceNode of this ReferenceType shall
• OPC-10000-9 – OPC Unified Architecture - Part 9: Alarms & Conditions
  7.4 HasEffectSuppressed
  HasEffect . The semantic of this ReferenceType is to point from a Transition to an Alarm that will be suppressed. If the reference is to an Object then all Alarms ... hierarchy below the Object containing the StateMachine are suppressed, If the target is an Alarm instance then the given Alarm instance is suppressed. The SourceNode of this ReferenceType shall
• OPC-10000-9 – OPC Unified Architecture - Part 9: Alarms & Conditions
  7.5 HasEffectUnsuppressed
  HasEffect . The semantic of this ReferenceType is to point from a Transition to an Alarm that will no longer be suppressed. If the Reference is to an Object then ... longer suppressed below the Object containing the StateMachine , if the target is an Alarm instance then the given Alarm instance is no longer suppressed. No errors are logged
• OPC-10000-9 – OPC Unified Architecture - Part 9: Alarms & Conditions
  8.1 Overview
  Object or they might have no direct References from the Object to the Alarm . Alarms might also be related to Objects that are nested under the Object . When the Object ... often important to be able to see if there is an active Alarm associated with it. This indication could just be a flashing value or flashing image or a change
• OPC-10000-9 – OPC Unified Architecture - Part 9: Alarms & Conditions
  8.2 AlarmState Variable
  PropertyType Mandatory ConformanceUnits A & C Summary HighestActiveSeverity - the highest Severity of any active Alarm . HighestUnackSeverity - the highest Severity of any Unacknowledged Alarm ActiveCount - a count of the number ... number of Unacknowledged Alarms UnconfirmedCount - a count of the number of Unconfirmed Alarms. If alarm confirmation is not supported this count shall be zero. Filter - provides a ContentFilter that
• OPC-10000-9 – OPC Unified Architecture - Part 9: Alarms & Conditions
  9.1 Overview
  Overview The goal of a well-designed alarm system is to ensure that an Operator is made aware of issues, both critical and non-critical, but is not overwhelmed ... alarms/alerts or other messages. When designing an alarm system, criteria are defined for alarm rates and general performance of the system at various levels ( Operator station, plant area, overall system
• OPC-10000-9 – OPC Unified Architecture - Part 9: Alarms & Conditions
  9.2 AlarmMetricsType
  HasComponent Variable AverageAlarmRate Double AlarmRateVariableType Mandatory HasComponent Method Reset Mandatory ConformanceUnits A & C Alarm Metrics An instance of AlarmMetricsType can be added, with a HasComponent reference, to any Object ... SubscribeToEvents" bit set within the EventNotifier Attribute. It will collect the Alarm metrics for all Alarm sources assigned to this notifier Object . For example, if Alarm metrics are desired
• OPC-10000-9 – OPC Unified Architecture - Part 9: Alarms & Conditions
  9.3 AlarmRateVariableType
  AlarmRateVariableType This variable type provides a unit field for the rate for which the Alarm diagnostic applies. Table 146 - AlarmRateVariableType Definition Attribute Value BrowseName AlarmRateVariableType IsAbstract False ValueRank Scalar DataType ... BrowseName DataType TypeDefinition ModellingRule HasProperty Variable Rate UInt16 PropertyType Mandatory ConformanceUnits A & C Alarm Metrics Rate - is the number of minutes over which the item is calculated
• OPC-10000-9 – OPC Unified Architecture - Part 9: Alarms & Conditions
  B.1.1 Overview
  B.1.1 Overview The following examples show the Event flow for typical Alarm situations. The tables list the value of state Variables for each Event Notification
• OPC-10000-9 – OPC Unified Architecture - Part 9: Alarms & Conditions
  B.1.2 Server maintains current state only
  create and maintain Branches of a single Condition . Figure B.1 shows an Alarm as it becomes active and then inactive and also the acknowledgement and confirmation cycles. Table B.1 lists ... False True True False Initial state of Condition . 1 NULL True False True True Alarm goes active. 2 NULL True True False True Condition acknowledged Confirm required 3 NULL False
• OPC-10000-9 – OPC Unified Architecture - Part 9: Alarms & Conditions
  B.1.3 Server maintains previous states
  False True True False Initial state of Condition . 1 NULL True False True True Alarm goes active. 2 b) NULL True True True True Condition acknowledged requires Confirm 3 NULL ... False True False True Alarm goes inactive. 4 NULL False True True False Confirmed 5 NULL True False True True Alarm goes active. 6 b) NULL False True True True
• OPC-10000-9 – OPC Unified Architecture - Part 9: Alarms & Conditions
  B.1.4 Server current-State Model with Suppression
  B.1.2 . This example does not use acknowledge or confirm - it assumes that the alarm is automatically acknowledged (and does not support confirm). It does add OutOfServiceState and SuppressedState. Figure ... shows an Alarm as it becomes active, is suppressed or is placed out of service and then inactive. Table B.3 lists the values of the state Variables . All Events
• OPC-10000-9 – OPC Unified Architecture - Part 9: Alarms & Conditions
  Annex C Mapping to EEMUA (Informative)
  EEMUA Terms EEMUA Term OPC UA Term EEMUA Definition Accepted Acknowledged = True An Alarm is accepted when the Operator has indicated awareness of its presence. In OPC UA this ... accomplished with the Acknowledge Method . Active Alarm Active = True An Alarm Condition which is on (i.e. limit has been exceeded and Condition continues to exist). Alarm Message Message Property (defined
• OPC-10000-9 – OPC Unified Architecture - Part 9: Alarms & Conditions
  F.2 SystemStateStateMachineType
  setpoints or limits of Alarms . The targets of the reference might be an individual Alarm or portion of a plant or piece of equipment. See section 7 for a list
• OPC-10000-12 – OPC Unified Architecture - Part 12: Discovery and Global Services
  7.8.3.1 CertificateGroupType
  shall be a direct subtype of CertificateType . See 7.8.3.4 for more details. The CertificateExpired Alarm which is raised when a Certificate associated with the CertificateGroup is about to expire ... multiple Certificates are about to expire an Alarm for each Certificate is raised. The CertificateExpirationAlarmType is defined in OPC 10000-9 . The TrustListOutOfDate Alarm which is raised when
• OPC-10000-100 – OPC Unified Architecture - Part 100: Devices
  4.5.4 DeviceHealth Interface
  PropertyType Conformance Units DI DeviceHealth DeviceHealthAlarms shall be used for instances of the DeviceHealth Alarm Types specified in 4.12 and any other subtypes of DeviceHealthDiagnosticAlarmType . It is recommended ... DeviceHealthAlarms folder also for Alarm instances that relate to the health condition of the Device and are not subtypes of DeviceHealthDiagnosticAlarmType
• OPC-10000-100 – OPC Unified Architecture - Part 100: Devices
  4.12.2 DeviceHealthDiagnosticAlarmType
  monitored items. Only subtypes of this type will be used in actual implementations. The Alarm becomes active when the device condition is abnormal. It is formally defined in Table
• OPC-10000-200 – OPC Unified Architecture - Part 200: Industrial Automation
  5.1 Overview
  relations to the triggers of a specific visualization or acoustic signal, like an Alarm or a specific Value of a Variable