Siemens SIMATIC ET 200AL, System Manual

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OPC UA communication
9.3 Using the S7-1500 as an OPC UA server
Communication
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Function Manual, 05/2021, A5E03735815-AJ
Definition of SimaticAlarmConditionType
The following figure shows how events of the type "SimaticAlarmConditionType" are defined
by a series of expansions to the OPC UA "BaseEventType".
Description of the event fields for SimaticAlarmConditionType
The following table contains information about the fields of SimaticAlarmConditionType for
stateful and acknowledgeable alarms, which are added to the event fields such as
SimaticEventType. Fields that are optional according to OPC UA and are not used by the OPC
UA server of the CPU are omitted. You can also find a description of the fields in the
specification OPC 10000-9: OPC Unified Architecture, Part 9: Alarms & Conditions, Release
1.04.
BrowsePath DataType Explanations
ConditionClassId NodeId Node IDs for SystemConditionClassType,
ProcessConditionClassType or BaseCondi-
tionClassType are possible
ConditionClassName LocalizedText Display name of the ConditionClassId
Retain Boolean Indicates that the alarm is still relevant for
OPC UA clients (set if alarm is still pending
and not acknowledged).
Comment LocalizedText
• Most recent comment entered using the
"AddComment" or "Acknowledge" meth-
od.
• ZERO after a server restart and if no
comment was entered.
Comment.SourceTimestamp UtcTime Time stamp for the last change of the com-
ment field
AckedState LocalizedText "Acknowledged" or "Unacknowledged"
AckedState.Id Boolean Set, if acknowledged