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Subscribe to events

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20 Feb 2024 17:47 #12575 by support

Replied by support on topic Subscribe to events

Examples for OPC client and subscriber development in Python are now on GitHub: github.com/OPCLabs/Examples-QuickOPC-Python .

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21 Nov 2023 13:27 #12389 by support

Replied by support on topic Subscribe to events

Note: QuickOPC now supports Python in much better way, cleaner syntax, and public packages (pypi.org/project/opclabs-quickopc/) on Python Package Index . See What's new in QuickOPC 2023.2 for more information. And, over 270 examples are available in the User's Guide!

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19 May 2021 11:43 #9687 by mozesa

Replied by mozesa on topic Subscribe to events

EventFilter(SelectClauses:[SimpleAttributeOperand(TypeDefinitionId:i=0, BrowsePath:[QualifiedName(0:ConditionClassId)], AttributeId:13, IndexRange:None), SimpleAttributeOperand(TypeDefinitionId:i=0, BrowsePath:[QualifiedName(0:ConditionClassName)]

In the event filters the

TypeDefinitionId:i=0

, it should be

TypeDefinitionId:i=2041

(BaseEventType).

Best Regards!

The following user(s) said Thank You: support

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19 May 2021 10:11 #9686 by support

Replied by support on topic Subscribe to events

Thanks for letting me know. If you can describe in one sentence what the solution to the problem was, please post it here, it may help other users.

Best regards

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19 May 2021 09:59 #9685 by mozesa

Replied by mozesa on topic Subscribe to events

Dear OPCLabs,

I could figure out the problem, so don't spend your time with it.

Thanks anyway.

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19 May 2021 09:19 - 19 May 2021 09:28 #9684 by mozesa

Subscribe to events was created by mozesa

Dear OPCLabs,

I would like to ask for your kind help.

This snippet works fine, I got the events right.

def subscribe_to_events():
    client = EasyUAClient()
    client.EventNotification += print
 
    IEasyUAClientExtension.SubscribeEvent(
        client,
        UAEndpointDescriptor("opc.tcp://L042IEAMO2:4840"),
        UANodeDescriptor(AddressSpace.Standard.UAObjectIds.Server),
        1_000,
    )
    Threading.Thread.Sleep(30 * 1000)

{Isolated=False} [] Success
{Isolated=False} [] Success; Refresh; RefreshInitiated
{Isolated=False} [] Success; Refresh; RefreshComplete
{Isolated=False} [] Success; (10 field results) [Server] 500! "" @19/05/2021 09:14:58
{Isolated=False} [] Success; (10 field results) [Application] 1000! "TRUE" @19/05/2021 09:15:09
{Isolated=False} [] Success; (10 field results) [Application] 1000! "TRUE" @19/05/2021 09:15:09
{Isolated=False} [] Success; (10 field results) [Application] 1000! "TRUE" @19/05/2021 09:15:09

There is a Python project in which I have to use another OPCUA implementation (FreeOPCUA) - the problem that I cannot get any events using that package.

I have the following event filter - can you see anything which prevents me to get the alerts?

Would it be possible to see the event filter that QuickOPC generates?

I really appreciate your help in this awkward situation.

Warning: Spoiler!

EventFilter(SelectClauses:[SimpleAttributeOperand(TypeDefinitionId:i=0, BrowsePath:[QualifiedName(0:ConditionClassId)], AttributeId:13, IndexRange:None), SimpleAttributeOperand(TypeDefinitionId:i=0, BrowsePath:[QualifiedName(0:ConditionClassName)], AttributeId:13, IndexRange:None), SimpleAttributeOperand(TypeDefinitionId:i=0, BrowsePath:[QualifiedName(0:ConditionSubClassId)], AttributeId:13, IndexRange:None), SimpleAttributeOperand(TypeDefinitionId:i=0, BrowsePath:[QualifiedName(0:ConditionSubClassName)], AttributeId:13, IndexRange:None), SimpleAttributeOperand(TypeDefinitionId:i=0, BrowsePath:[QualifiedName(0:ConditionName)], AttributeId:13, IndexRange:None), SimpleAttributeOperand(TypeDefinitionId:i=0, BrowsePath:[QualifiedName(0:BranchId)], AttributeId:13, IndexRange:None), SimpleAttributeOperand(TypeDefinitionId:i=0, BrowsePath:[QualifiedName(0:Retain)], AttributeId:13, IndexRange:None), SimpleAttributeOperand(TypeDefinitionId:i=0, BrowsePath:[QualifiedName(0:ClientUserId)], AttributeId:13, IndexRange:None), SimpleAttributeOperand(TypeDefinitionId:i=0, BrowsePath:[QualifiedName(0:EventId)], AttributeId:13, IndexRange:None), SimpleAttributeOperand(TypeDefinitionId:i=0, BrowsePath:[QualifiedName(0:EventType)], AttributeId:13, IndexRange:None), SimpleAttributeOperand(TypeDefinitionId:i=0, BrowsePath:[QualifiedName(0:SourceNode)], AttributeId:13, IndexRange:None), SimpleAttributeOperand(TypeDefinitionId:i=0, BrowsePath:[QualifiedName(0:SourceName)], AttributeId:13, IndexRange:None), SimpleAttributeOperand(TypeDefinitionId:i=0, BrowsePath:[QualifiedName(0:Time)], AttributeId:13, IndexRange:None), SimpleAttributeOperand(TypeDefinitionId:i=0, BrowsePath:[QualifiedName(0:ReceiveTime)], AttributeId:13, IndexRange:None), SimpleAttributeOperand(TypeDefinitionId:i=0, BrowsePath:[QualifiedName(0:Message)], AttributeId:13, IndexRange:None), SimpleAttributeOperand(TypeDefinitionId:i=0, BrowsePath:[QualifiedName(0:Severity)], AttributeId:13, IndexRange:None), SimpleAttributeOperand(TypeDefinitionId:i=0, BrowsePath:[QualifiedName(0:EnabledState)], AttributeId:13, IndexRange:None), SimpleAttributeOperand(TypeDefinitionId:i=0, BrowsePath:[QualifiedName(0:EnabledState), QualifiedName(0:Id)], AttributeId:13, IndexRange:None), SimpleAttributeOperand(TypeDefinitionId:i=0, BrowsePath:[QualifiedName(0:EnabledState), QualifiedName(0:EffectiveDisplayName)], AttributeId:13, IndexRange:None), SimpleAttributeOperand(TypeDefinitionId:i=0, BrowsePath:[QualifiedName(0:EnabledState), QualifiedName(0:TransitionTime)], AttributeId:13, IndexRange:None), SimpleAttributeOperand(TypeDefinitionId:i=0, BrowsePath:[QualifiedName(0:EnabledState), QualifiedName(0:EffectiveTransitionTime)], AttributeId:13, IndexRange:None), SimpleAttributeOperand(TypeDefinitionId:i=0, BrowsePath:[QualifiedName(0:EnabledState), QualifiedName(0:TrueState)], AttributeId:13, IndexRange:None), SimpleAttributeOperand(TypeDefinitionId:i=0, BrowsePath:[QualifiedName(0:EnabledState), QualifiedName(0:FalseState)], AttributeId:13, IndexRange:None), SimpleAttributeOperand(TypeDefinitionId:i=0, BrowsePath:[QualifiedName(0:Quality)], AttributeId:13, IndexRange:None), SimpleAttributeOperand(TypeDefinitionId:i=0, BrowsePath:[QualifiedName(0:Quality), QualifiedName(0:SourceTimestamp)], AttributeId:13, IndexRange:None), SimpleAttributeOperand(TypeDefinitionId:i=0, BrowsePath:[QualifiedName(0:LastSeverity)], AttributeId:13, IndexRange:None), SimpleAttributeOperand(TypeDefinitionId:i=0, BrowsePath:[QualifiedName(0:LastSeverity), QualifiedName(0:SourceTimestamp)], AttributeId:13, IndexRange:None), SimpleAttributeOperand(TypeDefinitionId:i=0, BrowsePath:[QualifiedName(0:Comment)], AttributeId:13, IndexRange:None), SimpleAttributeOperand(TypeDefinitionId:i=0, BrowsePath:[QualifiedName(0:Comment), QualifiedName(0:SourceTimestamp)], AttributeId:13, IndexRange:None)], WhereClause:ContentFilter(Elements:[ContentFilterElement(FilterOperator:9, FilterOperands:[SimpleAttributeOperand(TypeDefinitionId:i=0, BrowsePath:[QualifiedName(0:EventType)], AttributeId:13, IndexRange:None), LiteralOperand(Value:Variant(val:i=9341,type:VariantType.NodeId)), LiteralOperand(Value:Variant(val:i=18347,type:VariantType.NodeId)), LiteralOperand(Value:Variant(val:i=2830,type:VariantType.NodeId)), LiteralOperand(Value:Variant(val:i=10637,type:VariantType.NodeId)), LiteralOperand(Value:Variant(val:i=18496,type:VariantType.NodeId)), LiteralOperand(Value:Variant(val:i=2955,type:VariantType.NodeId)), LiteralOperand(Value:Variant(val:i=2915,type:VariantType.NodeId)), LiteralOperand(Value:Variant(val:ns=2;i=15143,type:VariantType.NodeId)), LiteralOperand(Value:Variant(val:i=17080,type:VariantType.NodeId)), LiteralOperand(Value:Variant(val:i=10060,type:VariantType.NodeId)), LiteralOperand(Value:Variant(val:i=9764,type:VariantType.NodeId)), LiteralOperand(Value:Variant(val:i=10368,type:VariantType.NodeId)), LiteralOperand(Value:Variant(val:i=11753,type:VariantType.NodeId)), LiteralOperand(Value:Variant(val:i=2881,type:VariantType.NodeId)), LiteralOperand(Value:Variant(val:ns=2;i=15292,type:VariantType.NodeId)), LiteralOperand(Value:Variant(val:i=10523,type:VariantType.NodeId)), LiteralOperand(Value:Variant(val:i=9623,type:VariantType.NodeId)), LiteralOperand(Value:Variant(val:ns=2;i=15441,type:VariantType.NodeId)), LiteralOperand(Value:Variant(val:ns=2;i=15590,type:VariantType.NodeId)), LiteralOperand(Value:Variant(val:i=9482,type:VariantType.NodeId)), LiteralOperand(Value:Variant(val:i=9906,type:VariantType.NodeId)), LiteralOperand(Value:Variant(val:i=10751,type:VariantType.NodeId)), LiteralOperand(Value:Variant(val:i=10214,type:VariantType.NodeId)), LiteralOperand(Value:Variant(val:i=2782,type:VariantType.NodeId)), LiteralOperand(Value:Variant(val:ns=2;i=15739,type:VariantType.NodeId)), LiteralOperand(Value:Variant(val:i=13225,type:VariantType.NodeId))])]))

Last edit: 19 May 2021 09:28 by mozesa.

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