public async Task ReadHistoryRawValues()
{
// describe this client application.
var clientDescription = new ApplicationDescription
{
ApplicationName = "Workstation.UaClient.FeatureTests",
ApplicationUri = $"urn:{System.Net.Dns.GetHostName()}:Workstation.UaClient.FeatureTests",
ApplicationType = ApplicationType.Client
};
// place to store certificates
var certificateStore = new DirectoryStore("./pki");
// create a 'UaTcpSessionChannel', a client-side channel that opens a 'session' with the server.
var channel = new UaTcpSessionChannel(
clientDescription,
certificateStore,
new AnonymousIdentity(), // the anonymous identity
"opc.tcp://localhost:48010"); // the endpoint of Unified Automation's UaCPPServer.
try
{
// try opening a session and reading a few nodes.
await channel.OpenAsync();
Console.WriteLine($"Opened session with endpoint '{channel.RemoteEndpoint.EndpointUrl}'.");
Console.WriteLine($"SecurityPolicy: '{channel.RemoteEndpoint.SecurityPolicyUri}'.");
Console.WriteLine($"SecurityMode: '{channel.RemoteEndpoint.SecurityMode}'.");
Console.WriteLine($"UserIdentityToken: '{channel.UserIdentity}'.");
Console.WriteLine("\nCheck if DataLogger active.");
// check if DataLoggerActive is true. If not, then call method StartLogging.
var req = new ReadRequest
{
NodesToRead = new[] {
new ReadValueId {
NodeId = NodeId.Parse("ns=2;s=Demo.History.DataLoggerActive"), AttributeId = AttributeIds.Value
}
},
};
var res = await channel.ReadAsync(req);
if (StatusCode.IsBad(res.Results[0].StatusCode))
{
throw new InvalidOperationException("Error reading 'Demo.History.DataLoggerActive'. ");
}
var isActive = res.Results[0].GetValueOrDefault <bool>();
if (!isActive)
{
Console.WriteLine("Activating DataLogger.");
var req1 = new CallRequest
{
MethodsToCall = new[] {
new CallMethodRequest {
ObjectId = NodeId.Parse("ns=2;s=Demo.History"), // parent node
MethodId = NodeId.Parse("ns=2;s=Demo.History.StartLogging")
},
},
};
var res1 = await channel.CallAsync(req1);
if (StatusCode.IsBad(res1.Results[0].StatusCode))
{
throw new InvalidOperationException("Error calling method 'Demo.History.StartLogging'.");
}
Console.WriteLine("Note: Datalogger has just been activated, so there will be little or no history data to read.");
Console.WriteLine(" Try again in 1 minute.");
}
Console.WriteLine("\nReading history for last 1 minute(s).");
// A continuation point is returned if there are more values to return than the
// limit set by parameter NumValuesPerNode. A client should continue calling HistoryRead
// until the continuation point returns null.
byte[] cp = null;
do
{
var req2 = new HistoryReadRequest
{
HistoryReadDetails = new ReadRawModifiedDetails
{
StartTime = DateTime.UtcNow.Add(TimeSpan.FromSeconds(-60)), // set start time to 1 minute ago
EndTime = DateTime.UtcNow,
NumValuesPerNode = 100, // sets limit. if there are more values to return then a continuation point is returned.
ReturnBounds = false, // set true to return interpolated values for the start and end times
},
TimestampsToReturn = TimestampsToReturn.Both,
ReleaseContinuationPoints = false, // set true to abandon returning any remaining values from this interval
NodesToRead = new[] {
new HistoryReadValueId {
NodeId = NodeId.Parse("ns=2;s=Demo.History.DoubleWithHistory"), ContinuationPoint = cp
},
},
};
var res2 = await channel.HistoryReadAsync(req2);
if (StatusCode.IsGood(res2.Results[0].StatusCode))
{
var historyData = res2.Results[0].HistoryData as HistoryData;
Console.WriteLine($"Found {historyData.DataValues.Length} value(s) for node '{req2.NodesToRead[0].NodeId}':");
foreach (var dv in historyData.DataValues)
{
Console.WriteLine($"Read {dv.Value}, q: {dv.StatusCode}, ts: {dv.SourceTimestamp}");
}
cp = res2.Results[0].ContinuationPoint;
// if ContinuationPoint is null, then there is no more data to return.
if (cp == null)
{
break;
}
}
else
{
Console.WriteLine($"HistoryRead return statuscode: {res2.Results[0].StatusCode}");
break;
}
} while (cp != null); // loop while ContinuationPoint is not null.
Console.WriteLine($"\nClosing session '{channel.SessionId}'.");
await channel.CloseAsync();
}
catch (Exception ex)
{
await channel.AbortAsync();
Console.WriteLine(ex.Message);
}
}
public async Task ReadHistorical()
{
var channel = new UaTcpSessionChannel(
localDescription,
certificateStore,
new AnonymousIdentity(),
"opc.tcp://localhost:48010",
loggerFactory: loggerFactory);
await channel.OpenAsync();
logger.LogInformation($"Opened session with endpoint '{channel.RemoteEndpoint.EndpointUrl}'.");
logger.LogInformation($"SecurityPolicy: '{channel.RemoteEndpoint.SecurityPolicyUri}'.");
logger.LogInformation($"SecurityMode: '{channel.RemoteEndpoint.SecurityMode}'.");
logger.LogInformation($"Activated session '{channel.SessionId}'.");
var historyReadRequest = new HistoryReadRequest
{
HistoryReadDetails = new ReadRawModifiedDetails
{
StartTime = DateTime.UtcNow - TimeSpan.FromMinutes(10),
EndTime = DateTime.UtcNow,
ReturnBounds = true,
IsReadModified = false
},
NodesToRead = new[]
{
new HistoryReadValueId
{
NodeId = NodeId.Parse("ns=2;s=Demo.History.DoubleWithHistory")
}
},
};
var historyReadResponse = await channel.HistoryReadAsync(historyReadRequest);
var result = historyReadResponse.Results[0];
StatusCode.IsGood(result.StatusCode)
.Should().BeTrue();
logger.LogInformation($"HistoryRead response status code: {result.StatusCode}, HistoryData count: {((HistoryData)result.HistoryData).DataValues.Length}.");
if (false) // UaCPPserver does not appear to store event history.
{
var historyReadRequest2 = new HistoryReadRequest
{
HistoryReadDetails = new ReadEventDetails
{
StartTime = DateTime.UtcNow - TimeSpan.FromMinutes(10),
EndTime = DateTime.UtcNow,
Filter = new EventFilter // Use EventHelper to select all the fields of AlarmCondition.
{
SelectClauses = EventHelper.GetSelectClauses <AlarmCondition>()
}
},
NodesToRead = new[]
{
new HistoryReadValueId
{
NodeId = NodeId.Parse("ns=2;s=Demo.History.DoubleWithHistory")
}
},
};
var historyReadResponse2 = await channel.HistoryReadAsync(historyReadRequest2);
var result2 = historyReadResponse2.Results[0];
StatusCode.IsGood(result2.StatusCode)
.Should().BeTrue();
logger.LogInformation($"HistoryRead response status code: {result2.StatusCode}, HistoryEvent count: {((HistoryEvent)result2.HistoryData).Events.Length}.");
// Use EventHelper to create AlarmConditions from the HistoryEventFieldList
var alarms = ((HistoryEvent)result2.HistoryData).Events.Select(e => EventHelper.Deserialize <AlarmCondition>(e.EventFields));
}
logger.LogInformation($"Closing session '{channel.SessionId}'.");
await channel.CloseAsync();
}
public async Task ReadHistorical()
{
var channel = new UaTcpSessionChannel(
this.localDescription,
this.certificateStore,
null,
EndpointUrl);
await channel.OpenAsync();
Console.WriteLine($"Opened session with endpoint '{channel.RemoteEndpoint.EndpointUrl}'.");
Console.WriteLine($"SecurityPolicy: '{channel.RemoteEndpoint.SecurityPolicyUri}'.");
Console.WriteLine($"SecurityMode: '{channel.RemoteEndpoint.SecurityMode}'.");
Console.WriteLine($"Activated session '{channel.SessionId}'.");
var historyReadRequest = new HistoryReadRequest
{
HistoryReadDetails = new ReadRawModifiedDetails
{
StartTime = DateTime.UtcNow - TimeSpan.FromMinutes(10),
EndTime = DateTime.UtcNow,
ReturnBounds = true,
IsReadModified = false
},
NodesToRead = new[]
{
new HistoryReadValueId
{
NodeId = NodeId.Parse("ns=2;s=MyLevel")
}
},
};
var historyReadResponse = await channel.HistoryReadAsync(historyReadRequest);
var result = historyReadResponse.Results[0];
Assert.IsTrue(StatusCode.IsGood(result.StatusCode));
Console.WriteLine($"HistoryRead response status code: {result.StatusCode}, HistoryData count: {((HistoryData)result.HistoryData.Body).DataValues.Length}.");
var historyReadRequest2 = new HistoryReadRequest
{
HistoryReadDetails = new ReadEventDetails
{
StartTime = DateTime.UtcNow - TimeSpan.FromMinutes(10),
EndTime = DateTime.UtcNow,
Filter = new EventFilter // Use EventHelper to select all the fields of AlarmCondition.
{
SelectClauses = EventHelper.GetSelectClauses <AlarmCondition>()
}
},
NodesToRead = new[]
{
new HistoryReadValueId
{
NodeId = NodeId.Parse("ns=2;s=MyDevice")
}
},
};
var historyReadResponse2 = await channel.HistoryReadAsync(historyReadRequest2);
var result2 = historyReadResponse2.Results[0];
Assert.IsTrue(StatusCode.IsGood(result2.StatusCode));
Console.WriteLine($"HistoryRead response status code: {result2.StatusCode}, HistoryEvent count: {((HistoryEvent)result2.HistoryData.Body).Events.Length}.");
// Use EventHelper to create AlarmConditions from the HistoryEventFieldList
var alarms = ((HistoryEvent)result2.HistoryData.Body).Events.Select(e => EventHelper.Deserialize <AlarmCondition>(e.EventFields));
Console.WriteLine($"Closing session '{channel.SessionId}'.");
await channel.CloseAsync();
}
