Examples - OPC Alarms&Events - Get state of a condition

.NET

C#
VB.NET

// This example shows how to obtain current state information for the condition instance corresponding to a Source and 
// certain ConditionName.
//
// Find all latest examples here: https://opclabs.doc-that.com/files/onlinedocs/OPCLabs-OpcStudio/Latest/examples.html .
// OPC client and subscriber examples in C# on GitHub: https://github.com/OPCLabs/Examples-QuickOPC-CSharp .
// Missing some example? Ask us for it on our Online Forums, https://www.opclabs.com/forum/index ! You do not have to own
// a commercial license in order to use Online Forums, and we reply to every post.

using System;
using OpcLabs.EasyOpc.AlarmsAndEvents;
using OpcLabs.EasyOpc.OperationModel;

namespace DocExamples.AlarmsAndEvents._EasyAEClient
{
    class GetConditionState 
    { 
        public static void Main1()
        {
            // Instantiate the client object.
            var client = new EasyAEClient();

            AEConditionState conditionState;
            try
            {
                conditionState = client.GetConditionState("", "OPCLabs.KitEventServer.2",
                    "Simulation.ConditionState1", "Simulated");
            }
            catch (OpcException opcException)
            {
                Console.WriteLine("*** Failure: {0}", opcException.GetBaseException().Message);
                return;
            }

            Console.WriteLine("ConditionState:");
            Console.WriteLine("    .ActiveSubcondition: {0}", conditionState.ActiveSubcondition);
            Console.WriteLine("    .Enabled: {0}", conditionState.Enabled);
            Console.WriteLine("    .Active: {0}", conditionState.Active);
            Console.WriteLine("    .Acknowledged: {0}", conditionState.Acknowledged);
            Console.WriteLine("    .Quality: {0}", conditionState.Quality);
            // Remark: IAEConditionState has many more properties
        }
    } 
}

' This example shows how to obtain current state information for the condition instance corresponding to a Source and 
' certain ConditionName.
'
' Find all latest examples here: https://opclabs.doc-that.com/files/onlinedocs/OPCLabs-OpcStudio/Latest/examples.html .
' OPC client and subscriber examples in VB.NET on GitHub: https://github.com/OPCLabs/Examples-QuickOPC-VBNET .
' Missing some example? Ask us for it on our Online Forums, https://www.opclabs.com/forum/index ! You do not have to own
' a commercial license in order to use Online Forums, and we reply to every post.

Imports OpcLabs.EasyOpc.AlarmsAndEvents
Imports OpcLabs.EasyOpc.OperationModel

Namespace AlarmsAndEvents._EasyAEClient

    Friend Class GetConditionState
        Public Shared Sub Main1()
            Dim client = New EasyAEClient()

            Dim conditionState As AEConditionState
            Try
                conditionState = client.GetConditionState("", "OPCLabs.KitEventServer.2", "Simulation.ConditionState1", "Simulated")
            Catch opcException As OpcException
                Console.WriteLine("*** Failure: {0}", opcException.GetBaseException().Message)
                Exit Sub
            End Try

            Console.WriteLine("ConditionState:")
            Console.WriteLine("    .ActiveSubcondition: {0}", conditionState.ActiveSubcondition)
            Console.WriteLine("    .Enabled: {0}", conditionState.Enabled)
            Console.WriteLine("    .Active: {0}", conditionState.Active)
            Console.WriteLine("    .Acknowledged: {0}", conditionState.Acknowledged)
            Console.WriteLine("    .Quality: {0}", conditionState.Quality)
            ' Remark: IAEConditionState has many more properties
        End Sub
    End Class

End Namespace

COM

Python (COM)
VBScript

# This example shows how to obtain current state information for the condition instance corresponding to a Source and 
# certain ConditionName.
#
# The Python for Windows (pywin32) extensions package is needed. Install it using "pip install pypiwin32".
# CAUTION: We now recommend using Python.NET package instead. Full set of examples with Python.NET is available!
#
# Find all latest examples here: https://opclabs.doc-that.com/files/onlinedocs/OPCLabs-OpcStudio/Latest/examples.html .
import time
import win32com.client
from pywintypes import com_error

serverDescriptor = win32com.client.Dispatch('OpcLabs.EasyOpc.ServerDescriptor')
serverDescriptor.UrlString = 'opcae://localhost/OPCLabs.KitEventServer.2'
#serverDescriptor.ServerClass = 'OPCLabs.KitEventServer.2'

sourceDescriptor = win32com.client.Dispatch('OpcLabs.EasyOpc.AlarmsAndEvents.AENodeDescriptor')
sourceDescriptor.QualifiedName = "Simulation.ConditionState1"

# Instantiate the client object
client = win32com.client.Dispatch('OpcLabs.EasyOpc.AlarmsAndEvents.EasyAEClient') 

print('Getting condition state...')
try:
    conditionState = client.GetConditionState(serverDescriptor, sourceDescriptor, 'Simulated', [])
except com_error as e:
    print('*** Failure: ' + e.args[2][1] + ': ' + e.args[2][2])
    exit()

print('ConditionState:')
print('    .ActiveSubcondition: ', conditionState.ActiveSubcondition)
print('    .Enabled: ', conditionState.Enabled)
print('    .Active: ', conditionState.Active)
print('    .Acknowledged: ', conditionState.Acknowledged)
print('    .Quality: ', conditionState.Quality)
# Note that IAEConditionState has many more properties

print()
print('Finished.')

Rem This example shows how to obtain current state information for the condition instance corresponding to a Source and 
Rem certain ConditionName.
Rem
Rem Find all latest examples here: https://opclabs.doc-that.com/files/onlinedocs/OPCLabs-OpcStudio/Latest/examples.html .
Rem OPC client and subscriber examples in VBScript on GitHub: https://github.com/OPCLabs/Examples-QuickOPC-VBScript .
Rem Missing some example? Ask us for it on our Online Forums, https://www.opclabs.com/forum/index ! You do not have to own
Rem a commercial license in order to use Online Forums, and we reply to every post.

Option Explicit

Dim ServerDescriptor: Set ServerDescriptor = CreateObject("OpcLabs.EasyOpc.ServerDescriptor")
ServerDescriptor.ServerClass = "OPCLabs.KitEventServer.2"

Dim SourceDescriptor: Set SourceDescriptor = CreateObject("OpcLabs.EasyOpc.AlarmsAndEvents.AENodeDescriptor")
SourceDescriptor.QualifiedName = "Simulation.ConditionState1"

Dim Client: Set Client = CreateObject("OpcLabs.EasyOpc.AlarmsAndEvents.EasyAEClient")
On Error Resume Next
Dim ConditionState: Set ConditionState = Client.GetConditionState(ServerDescriptor, SourceDescriptor, "Simulated", Array())
If Err.Number <> 0 Then
    WScript.Echo "*** Failure: " & Err.Source & ": " & Err.Description
    WScript.Quit
End If
On Error Goto 0

WScript.Echo "ConditionState:"
With ConditionState
    WScript.Echo Space(4) & ".ActiveSubcondition: " & .ActiveSubcondition
    WScript.Echo Space(4) & ".Enabled: " & .Enabled
    WScript.Echo Space(4) & ".Active: " & .Active
    WScript.Echo Space(4) & ".Acknowledged: " & .Acknowledged
    WScript.Echo Space(4) & ".Quality: " & .Quality
    Rem Note that IAEConditionState has many more properties
End With

Python

Python (.NET)

# This example shows how to obtain current state information for the condition instance corresponding to a Source and 
# certain ConditionName.
#
# Find all latest examples here: https://opclabs.doc-that.com/files/onlinedocs/OPCLabs-OpcStudio/Latest/examples.html .
# OPC client and subscriber examples in Python on GitHub: https://github.com/OPCLabs/Examples-QuickOPC-Python .
# Missing some example? Ask us for it on our Online Forums, https://www.opclabs.com/forum/index ! You do not have to own
# a commercial license in order to use Online Forums, and we reply to every post.
# The QuickOPC package is needed. Install it using "pip install opclabs_quickopc".
import opclabs_quickopc

# Import .NET namespaces.
from OpcLabs.EasyOpc import *
from OpcLabs.EasyOpc.AlarmsAndEvents import *
from OpcLabs.EasyOpc.OperationModel import *


# Instantiate the client object
client = EasyAEClient()

print('Getting condition state...')
try:
    conditionState = IEasyAEClientExtension.GetConditionState(client,
        '', 'OPCLabs.KitEventServer.2', 'Simulation.ConditionState1', 'Simulated')
except OpcException as opcException:
    print('*** Failure: ' + opcException.GetBaseException().Message)
    exit()

print('ConditionState:')
print('    .ActiveSubcondition: ', conditionState.ActiveSubcondition)
print('    .Enabled: ', conditionState.Enabled)
print('    .Active: ', conditionState.Active)
print('    .Acknowledged: ', conditionState.Acknowledged)
print('    .Quality: ', conditionState.Quality)
# Note that IAEConditionState has many more properties

print()
print('Finished.')

Concepts

Getting Condition State (OPC A&E)