public async Task Read()
{
var channel = new UaTcpSessionChannel(
localDescription,
certificateStore,
new AnonymousIdentity(),
EndpointUrl,
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 readRequest = new ReadRequest {
NodesToRead = new[] { new ReadValueId {
NodeId = NodeId.Parse(VariableIds.Server_ServerStatus), AttributeId = AttributeIds.Value
} }
};
var readResult = await channel.ReadAsync(readRequest);
var serverStatus = readResult.Results[0].GetValueOrDefault <ServerStatusDataType>();
logger.LogInformation("Server status:");
logger.LogInformation(" ProductName: {0}", serverStatus.BuildInfo.ProductName);
logger.LogInformation(" SoftwareVersion: {0}", serverStatus.BuildInfo.SoftwareVersion);
logger.LogInformation(" ManufacturerName: {0}", serverStatus.BuildInfo.ManufacturerName);
logger.LogInformation(" State: {0}", serverStatus.State);
logger.LogInformation(" CurrentTime: {0}", serverStatus.CurrentTime);
logger.LogInformation($"Closing session '{channel.SessionId}'.");
await channel.CloseAsync();
}
public async Task Polling()
{
var channel = new UaTcpSessionChannel(
localDescription,
certificateStore,
new AnonymousIdentity(),
EndpointUrl,
loggerFactory: loggerFactory);
await channel.OpenAsync();
logger.LogInformation($"Opened session with endpoint '{channel.RemoteEndpoint.EndpointUrl}'.");
logger.LogInformation($"SecurityPolicy: '{channel.RemoteEndpoint.SecurityPolicyUri}'.");
logger.LogInformation($"SecurityMode: '{channel.RemoteEndpoint.SecurityMode}'.");
logger.LogInformation($"Activated session '{channel.SessionId}'.");
var readRequest = new ReadRequest {
NodesToRead = new[] { new ReadValueId {
NodeId = NodeId.Parse(VariableIds.Server_ServerStatus_CurrentTime), AttributeId = AttributeIds.Value
} }
};
for (int i = 0; i < 10; i++)
{
var readResult = await channel.ReadAsync(readRequest);
logger.LogInformation("Read {0}", readResult.Results[0].GetValueOrDefault <DateTime>());
await Task.Delay(1000);
}
logger.LogInformation($"Closing session '{channel.SessionId}'.");
await channel.CloseAsync();
}
/// <summary>
/// Reads first/next level of tag tree.
/// </summary>
async Task <Tag> ReadTag(ReferenceDescription[] rds, UaTcpSessionChannel channel, Tag tag)
{
ReadValueId[] items = new ReadValueId[1];
items[0] = new ReadValueId {
NodeId = NodeId.Parse(rds.Last().NodeId.ToString()), AttributeId = AttributeIds.DataType
};
ReadRequest readRequest = new ReadRequest {
NodesToRead = items
};
ReadResponse readResponse = await channel.ReadAsync(readRequest);
if (string.IsNullOrEmpty(tag.Name))
{
tag = new Tag(rds.Take(rds.Length - 1).ToList());
}
tag.NestedName(rds.Last().DisplayName);
if (rds.Length > 2)
{
tag.Group4 = rds[1].DisplayName.ToString();
}
if (rds.Length > 1)
{
tag.Group3 = rds[0].DisplayName.ToString();
}
if (readResponse.Results[0].Value != null)
{
tag.ConversionFunction = Typ(readResponse.Results[0].Value.ToString());
}
return(tag);
}
public static async Task <DataValue[]> ReadVar(int node, string[] VarNames)
{
try
{
ReadValueId[] valuesToRead = new ReadValueId[VarNames.Length];
for (int i = 0; i < VarNames.Length; i++)
{
valuesToRead[i] = new ReadValueId
{
// you can parse the nodeId from a string.
NodeId = NodeId.Parse("ns=" + node.ToString() + ";s=" + VarNames[i]),
// variable class nodes have a Value attribute.
AttributeId = AttributeIds.Value
};
}
var readRequest = new ReadRequest
{
NodesToRead = valuesToRead
};
// send the ReadRequest to the server.
var readResult = await channel.ReadAsync(readRequest);
return(readResult.Results);
}
catch (Exception ex)
{
//await channel.AbortAsync();
return(null);
}
}
public async Task SessionTimeoutCausesFault()
{
// discover available endpoints of server.
var getEndpointsRequest = new GetEndpointsRequest
{
EndpointUrl = EndpointUrl,
ProfileUris = new[] { TransportProfileUris.UaTcpTransport }
};
Console.WriteLine($"Discovering endpoints of '{getEndpointsRequest.EndpointUrl}'.");
var getEndpointsResponse = await UaTcpDiscoveryService.GetEndpointsAsync(getEndpointsRequest);
var selectedEndpoint = getEndpointsResponse.Endpoints.OrderBy(e => e.SecurityLevel).Last();
var selectedTokenType = selectedEndpoint.UserIdentityTokens[0].TokenType;
IUserIdentity selectedUserIdentity;
switch (selectedTokenType)
{
case UserTokenType.UserName:
selectedUserIdentity = new UserNameIdentity("root", "secret");
break;
default:
selectedUserIdentity = new AnonymousIdentity();
break;
}
var channel = new UaTcpSessionChannel(
this.localDescription,
this.certificateStore,
selectedUserIdentity,
selectedEndpoint,
loggerFactory: this.loggerFactory,
options: new UaTcpSessionChannelOptions {
SessionTimeout = 10000
});
await channel.OpenAsync();
Console.WriteLine($"Opened session with endpoint '{channel.RemoteEndpoint.EndpointUrl}'.");
Console.WriteLine($"SecurityPolicy: '{channel.RemoteEndpoint.SecurityPolicyUri}'.");
Console.WriteLine($"SecurityMode: '{channel.RemoteEndpoint.SecurityMode}'.");
Console.WriteLine($"Activated session '{channel.SessionId}'.");
// server should close session due to inactivity
await Task.Delay(20000);
// should throw exception
var readRequest = new ReadRequest {
NodesToRead = new[] { new ReadValueId {
NodeId = NodeId.Parse(VariableIds.Server_ServerStatus_CurrentTime), AttributeId = AttributeIds.Value
} }
};
await channel.ReadAsync(readRequest);
Console.WriteLine($"Closing session '{channel.SessionId}'.");
await channel.CloseAsync();
}
//private async void DisplayTimeEvent(object sender, ElapsedEventArgs e)
//{
// if (serverName != "")
// {
// try
// {
// //await channel.OpenAsync();
// var readResult = await channel.ReadAsync(readRequest);
// itemDict.Clear();
// for (int i = 0; i < itemsNames.Count; i++)
// {
// itemDict.Add(names[i], readResult.Results[i].Value.ToString());
// }
// ItemsChanged?.Invoke(itemDict);
// }
// catch (Exception ex) { MessageBox.Show(ex.Message); }
// }
//}
public async Task <Dictionary <string, string> > ReadOPCAsync()
{
if (serverName != "")
{
try
{
//await channel.OpenAsync();
var readResult = await channel.ReadAsync(readRequest);
itemDict.Clear();
for (int i = 0; i < itemsNames.Count; i++)
{
itemDict.Add(names[i], readResult.Results[i].Value.ToString());
}
}
catch (Exception ex) { MessageBox.Show(ex.Message); }
}
return(itemDict);
}
public async Task StructureTest()
{
var channel = new UaTcpSessionChannel(
localDescription,
certificateStore,
new AnonymousIdentity(),
EndpointUrl,
loggerFactory: loggerFactory);
await channel.OpenAsync();
var readRequest = new ReadRequest
{
NodesToRead = new[]
{
new ReadValueId {
AttributeId = AttributeIds.Value, NodeId = NodeId.Parse("ns=2;s=Demo.Static.Arrays.Structure")
},
},
};
var readResponse = await channel.ReadAsync(readRequest);
foreach (var result in readResponse.Results)
{
StatusCode.IsGood(result.StatusCode)
.Should().BeTrue();
}
// reading this node returns an array of ExtensionObjects
var obj = readResponse.Results[0].Value;
// create new DataValue for writing. Most servers reject writing values with timestamps.
var newValue = new DataValue(obj);
var writeRequest = new WriteRequest
{
NodesToWrite = new[]
{
new WriteValue {
AttributeId = AttributeIds.Value, NodeId = NodeId.Parse("ns=2;s=Demo.Static.Arrays.Structure"), Value = newValue
},
},
};
var writeResponse = await channel.WriteAsync(writeRequest);
foreach (var result in writeResponse.Results)
{
StatusCode.IsGood(result)
.Should().BeTrue();
}
logger.LogInformation($"Closing session '{channel.SessionId}'.");
await channel.CloseAsync();
}
/// <summary>
/// Reads tag unit.
/// </summary>
async Task ReadUnit(ReferenceDescription[] rds, UaTcpSessionChannel channel, Tag tag)
{
ReadValueId[] unit = new ReadValueId[1];
unit[0] = new ReadValueId {
NodeId = NodeId.Parse(rds.Last().NodeId.ToString()), AttributeId = AttributeIds.Value
};
ReadRequest unitRequest = new ReadRequest {
NodesToRead = unit
};
ReadResponse unitResponse = await channel.ReadAsync(unitRequest);
ExtensionObject EO = (ExtensionObject)unitResponse.Results[0].Value;
EUInformation EU = (EUInformation)EO.Body;
tag.Unit = EU.DisplayName; //zapis jednostki
}
public override async Task <VTQ[]> ReadDataItems(string group, IList <ReadRequest> items, Duration?timeout)
{
int N = items.Count;
VTQ[] res = new VTQ[N];
bool connected = await TryConnect();
if (!connected)
{
for (int i = 0; i < N; ++i)
{
VTQ vtq = items[i].LastValue;
vtq.Q = Quality.Bad;
res[i] = vtq;
}
return(res);
}
ReadValueId[] dataItemsToRead = new ReadValueId[N];
for (int i = 0; i < N; ++i)
{
ReadRequest request = items[i];
NodeId node = mapId2Info[request.ID].Node ?? NodeId.Null;
dataItemsToRead[i] = new ReadValueId {
AttributeId = AttributeIds.Value, NodeId = node
};
}
var readRequest = new Workstation.ServiceModel.Ua.ReadRequest {
NodesToRead = dataItemsToRead,
TimestampsToReturn = TimestampsToReturn.Source,
};
ReadResponse readResponse = await connection.ReadAsync(readRequest);
for (int i = 0; i < N; ++i)
{
res[i] = MakeVTQ(readResponse.Results[i], items[i].LastValue, items[i].ID);
}
return(res);
}
private async void DisplayTimeEvent(object sender, ElapsedEventArgs e)
{
if (serverName != "")
{
try
{
//await channel.OpenAsync();
var readResult = await channel.ReadAsync(readRequest);
itemDict.Clear();
for (int i = 0; i < itemsNames.Count; i++)
{
itemDict.Add(names[i], readResult.Results[i].Value.ToString());
//MessageBox.Show(readResult.Results[i].Value.ToString());
}
ItemsChanged?.Invoke(itemDict);
}
catch (Exception ex) { MessageBox.Show(ex.Message); }
}
}
/// <summary>
/// Most important method - reading the tags.
/// </summary>
public async Task <List <Tag> > OPCReadAsync(string OPCAdress)
{
//Preparing data to connect to OPC server
Tags = new List <Tag>();
var loggerFactory = new LoggerFactory();
var appDescription = new ApplicationDescription()
{
ApplicationName = "OPC",
ApplicationUri = $"urn:{System.Net.Dns.GetHostName()}:OPC",
ApplicationType = ApplicationType.Client,
};
var certificateStore = new DirectoryStore(
Path.Combine(Environment.GetFolderPath(Environment.SpecialFolder.LocalApplicationData), "Workstation.ConsoleApp", "pki"));
var channel = new UaTcpSessionChannel(
appDescription,
certificateStore,
new AnonymousIdentity(), //by now doesn't support signing in
OPCAdress,
loggerFactory: loggerFactory);
try
{
Stopwatch stopwatch = new Stopwatch(); //measuring operations time
stopwatch.Start();
await channel.OpenAsync(); //opening channel
OnNewEvent(new LogEventArgs("Connected to OPC Server"));
//opening OPC tree branches to find actual tags - only proper for B&R X20 PLC
BrowseRequest browseRequest = new BrowseRequest {
NodesToBrowse = new BrowseDescription[] { new BrowseDescription {
NodeId = NodeId.Parse(ObjectIds.RootFolder), BrowseDirection = BrowseDirection.Forward, ReferenceTypeId = NodeId.Parse(ReferenceTypeIds.HierarchicalReferences), NodeClassMask = (uint)NodeClass.Variable | (uint)NodeClass.Object | (uint)NodeClass.Method, IncludeSubtypes = true, ResultMask = (uint)BrowseResultMask.All
} },
};
BrowseResponse browseResponse = await channel.BrowseAsync(browseRequest);
browseRequest = new BrowseRequest {
NodesToBrowse = new BrowseDescription[] { new BrowseDescription {
NodeId = ExpandedNodeId.ToNodeId(browseResponse.Results[0].References[0].NodeId, channel.NamespaceUris), BrowseDirection = BrowseDirection.Forward, ReferenceTypeId = NodeId.Parse(ReferenceTypeIds.HierarchicalReferences), NodeClassMask = (uint)NodeClass.Variable | (uint)NodeClass.Object | (uint)NodeClass.Method, IncludeSubtypes = true, ResultMask = (uint)BrowseResultMask.All
} },
};
browseResponse = await channel.BrowseAsync(browseRequest);
browseRequest = new BrowseRequest {
NodesToBrowse = new BrowseDescription[] { new BrowseDescription {
NodeId = ExpandedNodeId.ToNodeId(browseResponse.Results[0].References[1].NodeId, channel.NamespaceUris), BrowseDirection = BrowseDirection.Forward, ReferenceTypeId = NodeId.Parse(ReferenceTypeIds.HierarchicalReferences), NodeClassMask = (uint)NodeClass.Variable | (uint)NodeClass.Object | (uint)NodeClass.Method, IncludeSubtypes = true, ResultMask = (uint)BrowseResultMask.All
} },
};
browseResponse = await channel.BrowseAsync(browseRequest);
browseRequest = new BrowseRequest {
NodesToBrowse = new BrowseDescription[] { new BrowseDescription {
NodeId = ExpandedNodeId.ToNodeId(browseResponse.Results[0].References[0].NodeId, channel.NamespaceUris), BrowseDirection = BrowseDirection.Forward, ReferenceTypeId = NodeId.Parse(ReferenceTypeIds.HierarchicalReferences), NodeClassMask = (uint)NodeClass.Variable | (uint)NodeClass.Object | (uint)NodeClass.Method, IncludeSubtypes = true, ResultMask = (uint)BrowseResultMask.All
} },
};
browseResponse = await channel.BrowseAsync(browseRequest);
browseRequest = new BrowseRequest {
NodesToBrowse = new BrowseDescription[] { new BrowseDescription {
NodeId = ExpandedNodeId.ToNodeId(browseResponse.Results[0].References[0].NodeId, channel.NamespaceUris), BrowseDirection = BrowseDirection.Forward, ReferenceTypeId = NodeId.Parse(ReferenceTypeIds.HierarchicalReferences), NodeClassMask = (uint)NodeClass.Variable | (uint)NodeClass.Object | (uint)NodeClass.Method, IncludeSubtypes = true, ResultMask = (uint)BrowseResultMask.All
} },
};
browseResponse = await channel.BrowseAsync(browseRequest);
browseRequest = new BrowseRequest {
NodesToBrowse = new BrowseDescription[] { new BrowseDescription {
NodeId = ExpandedNodeId.ToNodeId(browseResponse.Results[0].References[1].NodeId, channel.NamespaceUris), BrowseDirection = BrowseDirection.Forward, ReferenceTypeId = NodeId.Parse(ReferenceTypeIds.HierarchicalReferences), NodeClassMask = (uint)NodeClass.Variable | (uint)NodeClass.Object | (uint)NodeClass.Method, IncludeSubtypes = true, ResultMask = (uint)BrowseResultMask.All
} },
};
browseResponse = await channel.BrowseAsync(browseRequest);
browseRequest = new BrowseRequest {
NodesToBrowse = new BrowseDescription[] { new BrowseDescription {
NodeId = ExpandedNodeId.ToNodeId(browseResponse.Results[0].References[10].NodeId, channel.NamespaceUris), BrowseDirection = BrowseDirection.Forward, ReferenceTypeId = NodeId.Parse(ReferenceTypeIds.HierarchicalReferences), NodeClassMask = (uint)NodeClass.Variable | (uint)NodeClass.Object | (uint)NodeClass.Method, IncludeSubtypes = true, ResultMask = (uint)BrowseResultMask.All
} },
};
BrowseResponse browseResponse0 = await channel.BrowseAsync(browseRequest);
int nestingLevel = 0; //nesting level counter
Tag tag = new Tag(); //initializing first tag
int allTagsCount = browseResponse0.Results[0].References.Length - 1; //for counting progress percentage
for (int i = browseResponse0.Results[0].References.Length - 1; i >= 0; i--) //first level loop
{
var rd = browseResponse0.Results[0].References[i];
if (Tags.Count > 0 && rd.DisplayName.ToString() == Tags[0].Name)
{
break;
} //to avoid getting the same tags second time
nestingLevel = 0;
ReadValueId[] items = new ReadValueId[1];
items[0] = new ReadValueId {
NodeId = NodeId.Parse(rd.NodeId.ToString()), AttributeId = AttributeIds.DataType
};
ReadRequest readRequest = new ReadRequest {
NodesToRead = items
};
ReadResponse readResponse = await channel.ReadAsync(readRequest);
if (string.IsNullOrEmpty(tag.Name))
{
tag = new Tag(rd.DisplayName.ToString());
}
if (readResponse.Results[0].Value != null)
{
tag.ConversionFunction = Typ(readResponse.Results[0].Value.ToString());
}
browseRequest = new BrowseRequest {
NodesToBrowse = new BrowseDescription[] { new BrowseDescription {
NodeId = ExpandedNodeId.ToNodeId(rd.NodeId, channel.NamespaceUris), BrowseDirection = BrowseDirection.Forward, ReferenceTypeId = NodeId.Parse(ReferenceTypeIds.HierarchicalReferences), NodeClassMask = (uint)NodeClass.Variable | (uint)NodeClass.Object | (uint)NodeClass.Method, IncludeSubtypes = true, ResultMask = (uint)BrowseResultMask.All
} },
};
browseResponse = await channel.BrowseAsync(browseRequest);
foreach (var rd1 in browseResponse.Results[0].References ?? new ReferenceDescription[0]) //second level loop (nesting=1)
{
if (!rd1.NodeId.ToString().Contains("#"))
{
nestingLevel = 1;
tag = await ReadTag(new ReferenceDescription[] { rd, rd1 }, channel, tag);
browseRequest = new BrowseRequest {
NodesToBrowse = new BrowseDescription[] { new BrowseDescription {
NodeId = ExpandedNodeId.ToNodeId(rd1.NodeId, channel.NamespaceUris), BrowseDirection = BrowseDirection.Forward, ReferenceTypeId = NodeId.Parse(ReferenceTypeIds.HierarchicalReferences), NodeClassMask = (uint)NodeClass.Variable | (uint)NodeClass.Object | (uint)NodeClass.Method, IncludeSubtypes = true, ResultMask = (uint)BrowseResultMask.All
} },
};
browseResponse = await channel.BrowseAsync(browseRequest);
foreach (var rd2 in browseResponse.Results[0].References ?? new ReferenceDescription[0]) //third level loop (nesting=2)
{
if (!rd2.NodeId.ToString().Contains("#"))
{
nestingLevel = 2;
tag = await ReadTag(new ReferenceDescription[] { rd, rd1, rd2 }, channel, tag);
browseRequest = new BrowseRequest {
NodesToBrowse = new BrowseDescription[] { new BrowseDescription {
NodeId = ExpandedNodeId.ToNodeId(rd2.NodeId, channel.NamespaceUris), BrowseDirection = BrowseDirection.Forward, ReferenceTypeId = NodeId.Parse(ReferenceTypeIds.HierarchicalReferences), NodeClassMask = (uint)NodeClass.Variable | (uint)NodeClass.Object | (uint)NodeClass.Method, IncludeSubtypes = true, ResultMask = (uint)BrowseResultMask.All
} },
};
browseResponse = await channel.BrowseAsync(browseRequest);
foreach (var rd3 in browseResponse.Results[0].References ?? new ReferenceDescription[0]) //fourth level loop (nesting=3)
{
if (!rd3.NodeId.ToString().Contains("#"))
{
nestingLevel = 3;
tag = await ReadTag(new ReferenceDescription[] { rd, rd1, rd2, rd3 }, channel, tag);
}
else if (rd3.NodeId.ToString().Contains("#EngineeringUnits"))
{
await ReadUnit(new ReferenceDescription[] { rd, rd1, rd2, rd3 }, channel, tag);
}
if (nestingLevel == 3 && !string.IsNullOrEmpty(tag.Name))
{
tag = SaveTag(tag);
}
}
}
else if (rd2.NodeId.ToString().Contains("#EngineeringUnits"))
{
await ReadUnit(new ReferenceDescription[] { rd, rd1, rd2 }, channel, tag);
}
if (nestingLevel == 2 && !string.IsNullOrEmpty(tag.Name))
{
tag = SaveTag(tag);
}
}
}
else if (rd1.NodeId.ToString().Contains("#EngineeringUnits"))
{
await ReadUnit(new ReferenceDescription[] { rd, rd1 }, channel, tag);
}
if (nestingLevel == 1 && !string.IsNullOrEmpty(tag.Name))
{
tag = SaveTag(tag);
}
}
if (nestingLevel == 0 && !string.IsNullOrEmpty(tag.Name))
{
tag = SaveTag(tag);
}
OnProgressChanged(new ProgressChangedArgs((allTagsCount - i) * 100 / allTagsCount)); //computing progress percentage
}
await channel.CloseAsync(); //closing the channel
stopwatch.Stop();
OnNewEvent(new LogEventArgs(Tags.Count + " tags read, time elapsed: " + stopwatch.Elapsed.TotalSeconds.ToString("F3") + " s"));
}
catch (Exception ex)
{
OnNewEvent(new LogEventArgs("Error connecting to OPC server."));
await channel.AbortAsync();
}
return(Tags);
}
public async Task StackTest()
{
var channel = new UaTcpSessionChannel(
localDescription,
certificateStore,
new AnonymousIdentity(),
EndpointUrl,
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 readRequest = new ReadRequest
{
NodesToRead = new[]
{
new ReadValueId {
AttributeId = AttributeIds.Value, NodeId = NodeId.Parse("ns=2;s=Demo.Static.Scalar.Boolean")
},
new ReadValueId {
AttributeId = AttributeIds.Value, NodeId = NodeId.Parse("ns=2;s=Demo.Static.Scalar.SByte")
},
new ReadValueId {
AttributeId = AttributeIds.Value, NodeId = NodeId.Parse("ns=2;s=Demo.Static.Scalar.Int16")
},
new ReadValueId {
AttributeId = AttributeIds.Value, NodeId = NodeId.Parse("ns=2;s=Demo.Static.Scalar.Int32")
},
new ReadValueId {
AttributeId = AttributeIds.Value, NodeId = NodeId.Parse("ns=2;s=Demo.Static.Scalar.Int64")
},
new ReadValueId {
AttributeId = AttributeIds.Value, NodeId = NodeId.Parse("ns=2;s=Demo.Static.Scalar.Byte")
},
new ReadValueId {
AttributeId = AttributeIds.Value, NodeId = NodeId.Parse("ns=2;s=Demo.Static.Scalar.UInt16")
},
new ReadValueId {
AttributeId = AttributeIds.Value, NodeId = NodeId.Parse("ns=2;s=Demo.Static.Scalar.UInt32")
},
new ReadValueId {
AttributeId = AttributeIds.Value, NodeId = NodeId.Parse("ns=2;s=Demo.Static.Scalar.UInt64")
},
new ReadValueId {
AttributeId = AttributeIds.Value, NodeId = NodeId.Parse("ns=2;s=Demo.Static.Scalar.Float")
},
new ReadValueId {
AttributeId = AttributeIds.Value, NodeId = NodeId.Parse("ns=2;s=Demo.Static.Scalar.Double")
},
new ReadValueId {
AttributeId = AttributeIds.Value, NodeId = NodeId.Parse("ns=2;s=Demo.Static.Scalar.String")
},
new ReadValueId {
AttributeId = AttributeIds.Value, NodeId = NodeId.Parse("ns=2;s=Demo.Static.Scalar.DateTime")
},
new ReadValueId {
AttributeId = AttributeIds.Value, NodeId = NodeId.Parse("ns=2;s=Demo.Static.Scalar.Guid")
},
new ReadValueId {
AttributeId = AttributeIds.Value, NodeId = NodeId.Parse("ns=2;s=Demo.Static.Scalar.ByteString")
},
new ReadValueId {
AttributeId = AttributeIds.Value, NodeId = NodeId.Parse("ns=2;s=Demo.Static.Scalar.XmlElement")
},
new ReadValueId {
AttributeId = AttributeIds.Value, NodeId = NodeId.Parse("ns=2;s=Demo.Static.Scalar.LocalizedText")
},
new ReadValueId {
AttributeId = AttributeIds.Value, NodeId = NodeId.Parse("ns=2;s=Demo.Static.Scalar.QualifiedName")
},
new ReadValueId {
AttributeId = AttributeIds.Value, NodeId = NodeId.Parse("ns=2;s=Demo.Static.Arrays.Boolean")
},
new ReadValueId {
AttributeId = AttributeIds.Value, NodeId = NodeId.Parse("ns=2;s=Demo.Static.Arrays.SByte")
},
new ReadValueId {
AttributeId = AttributeIds.Value, NodeId = NodeId.Parse("ns=2;s=Demo.Static.Arrays.Int16")
},
new ReadValueId {
AttributeId = AttributeIds.Value, NodeId = NodeId.Parse("ns=2;s=Demo.Static.Arrays.Int32")
},
new ReadValueId {
AttributeId = AttributeIds.Value, NodeId = NodeId.Parse("ns=2;s=Demo.Static.Arrays.Int64")
},
new ReadValueId {
AttributeId = AttributeIds.Value, NodeId = NodeId.Parse("ns=2;s=Demo.Static.Arrays.Byte")
},
new ReadValueId {
AttributeId = AttributeIds.Value, NodeId = NodeId.Parse("ns=2;s=Demo.Static.Arrays.UInt16")
},
new ReadValueId {
AttributeId = AttributeIds.Value, NodeId = NodeId.Parse("ns=2;s=Demo.Static.Arrays.UInt32")
},
new ReadValueId {
AttributeId = AttributeIds.Value, NodeId = NodeId.Parse("ns=2;s=Demo.Static.Arrays.UInt64")
},
new ReadValueId {
AttributeId = AttributeIds.Value, NodeId = NodeId.Parse("ns=2;s=Demo.Static.Arrays.Float")
},
new ReadValueId {
AttributeId = AttributeIds.Value, NodeId = NodeId.Parse("ns=2;s=Demo.Static.Arrays.Double")
},
new ReadValueId {
AttributeId = AttributeIds.Value, NodeId = NodeId.Parse("ns=2;s=Demo.Static.Arrays.String")
},
new ReadValueId {
AttributeId = AttributeIds.Value, NodeId = NodeId.Parse("ns=2;s=Demo.Static.Arrays.DateTime")
},
new ReadValueId {
AttributeId = AttributeIds.Value, NodeId = NodeId.Parse("ns=2;s=Demo.Static.Arrays.Guid")
},
new ReadValueId {
AttributeId = AttributeIds.Value, NodeId = NodeId.Parse("ns=2;s=Demo.Static.Arrays.ByteString")
},
new ReadValueId {
AttributeId = AttributeIds.Value, NodeId = NodeId.Parse("ns=2;s=Demo.Static.Arrays.XmlElement")
},
new ReadValueId {
AttributeId = AttributeIds.Value, NodeId = NodeId.Parse("ns=2;s=Demo.Static.Arrays.LocalizedText")
},
new ReadValueId {
AttributeId = AttributeIds.Value, NodeId = NodeId.Parse("ns=2;s=Demo.Static.Arrays.QualifiedName")
},
},
};
var sw = new Stopwatch();
sw.Restart();
for (int i = 0; i < 1; i++)
{
var readResponse = await channel.ReadAsync(readRequest);
foreach (var result in readResponse.Results)
{
StatusCode.IsGood(result.StatusCode)
.Should().BeTrue();
var obj = result.GetValue();
}
}
sw.Stop();
logger.LogInformation($"{sw.ElapsedMilliseconds} ms");
logger.LogInformation($"Closing session '{channel.SessionId}'.");
await channel.CloseAsync();
}
public async Task ReadIndexRange()
{
// 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($"UserIdentityToken: '{channel.UserIdentity}'.");
// build a ReadRequest. See 'OPC UA Spec Part 4' paragraph 5.10.2
var readRequest = new ReadRequest
{
// set the NodesToRead to an array of ReadValueIds.
NodesToRead = new[] {
// construct a ReadValueId from a NodeId and AttributeId.
new ReadValueId {
// use a saved NodeId or Parse the nodeId from a string.
// e.g. "ns=2;s=Demo.Static.Scalar.Double"
NodeId = NodeId.Parse("ns=2;s=Demo.CTT.AllProfiles.Arrays.Double"),
// variable class nodes have a Value attribute.
AttributeId = AttributeIds.Value,
// ask to read a range of the underlying array
IndexRange = "1:2"
}
}
};
// send the ReadRequest to the server.
var readResult = await channel.ReadAsync(readRequest);
// 'Results' will be an array of DataValues, one for every ReadValueId.
// A DataValue holds the sampled value, timestamps and quality status code.
var result = readResult.Results[0].GetValueOrDefault <double[]>();
Console.WriteLine($"Read result: {string.Join(' ', result)}");
Console.WriteLine($"Closing session '{channel.SessionId}'.");
await channel.CloseAsync();
}
catch (Exception ex)
{
await channel.AbortAsync();
Console.WriteLine(ex.Message);
}
}
private static async Task TestAsync(CancellationToken token = default(CancellationToken))
{
var discoveryUrl = $"opc.tcp://localhost:26543";
var cycleTime = 5000;
// setup logger
var loggerFactory = new LoggerFactory();
loggerFactory.AddConsole(LogLevel.Information);
var logger = loggerFactory?.CreateLogger <Program>();
// Describe this app.
var appDescription = new ApplicationDescription()
{
ApplicationName = "DataLoggingConsole",
ApplicationUri = $"urn:{System.Net.Dns.GetHostName()}:DataLoggingConsole",
ApplicationType = ApplicationType.Client,
};
// Create a certificate store on disk.
var certificateStore = new DirectoryStore(
Path.Combine(Environment.GetFolderPath(Environment.SpecialFolder.LocalApplicationData), "DataLoggingConsole", "pki"));
// Create array of NodeIds to log.
var nodeIds = new[]
{
NodeId.Parse("i=2258")
};
while (!token.IsCancellationRequested)
{
try
{
// Discover endpoints.
var getEndpointsRequest = new GetEndpointsRequest
{
EndpointUrl = discoveryUrl,
ProfileUris = new[] { TransportProfileUris.UaTcpTransport }
};
var getEndpointsResponse = await UaTcpDiscoveryService.GetEndpointsAsync(getEndpointsRequest).ConfigureAwait(false);
if (getEndpointsResponse.Endpoints == null || getEndpointsResponse.Endpoints.Length == 0)
{
throw new InvalidOperationException($"'{discoveryUrl}' returned no endpoints.");
}
// Choose the endpoint with highest security level.
var remoteEndpoint = getEndpointsResponse.Endpoints.OrderBy(e => e.SecurityLevel).Last();
// Choose a User Identity.
IUserIdentity userIdentity = null;
if (remoteEndpoint.UserIdentityTokens.Any(p => p.TokenType == UserTokenType.Anonymous))
{
userIdentity = new AnonymousIdentity();
}
else if (remoteEndpoint.UserIdentityTokens.Any(p => p.TokenType == UserTokenType.UserName))
{
// If a username / password is requested, provide from .config file.
userIdentity = new UserNameIdentity("root", "secret");
}
else
{
throw new InvalidOperationException("Server must accept Anonymous or UserName identity.");
}
// Create a session with the server.
var session = new UaTcpSessionChannel(appDescription, certificateStore, async e => userIdentity, remoteEndpoint, loggerFactory);
try
{
await session.OpenAsync();
RegisterNodesResponse registerNodesResponse = null;
if (true) // True registers the nodeIds to improve performance of the server.
{
// Register array of nodes to read.
var registerNodesRequest = new RegisterNodesRequest
{
NodesToRegister = nodeIds
};
registerNodesResponse = await session.RegisterNodesAsync(registerNodesRequest);
}
// Prepare read request.
var readRequest = new ReadRequest
{
NodesToRead = (registerNodesResponse?.RegisteredNodeIds ?? nodeIds)
.Select(n => new ReadValueId {
NodeId = n, AttributeId = AttributeIds.Value
})
.ToArray()
};
while (!token.IsCancellationRequested)
{
// Read the nodes.
var readResponse = await session.ReadAsync(readRequest).ConfigureAwait(false);
// Write the results.
for (int i = 0; i < readRequest.NodesToRead.Length; i++)
{
logger?.LogInformation($"{nodeIds[i]}; value: {readResponse.Results[i]}");
}
try
{
await Task.Delay(cycleTime, token);
}
catch { }
}
await session.CloseAsync();
}
catch
{
await session.AbortAsync();
throw;
}
}
catch (Exception ex)
{
logger?.LogError(ex.Message);
}
try
{
await Task.Delay(cycleTime, token);
}
catch { }
}
}
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 SetChanel()
{
var clientDescription = new ApplicationDescription
{
ApplicationName = "Workstation.UaClient.FeatureTests",
ApplicationUri = $"urn:{System.Net.Dns.GetHostName()}:Workstation.UaClient.FeatureTests",
ApplicationType = Workstation.ServiceModel.Ua.ApplicationType.Client
};
channel = new UaTcpSessionChannel(
clientDescription,
null, // no x509 certificates
new AnonymousIdentity(),
url,
SecurityPolicyUris.None);
try
{
await channel.OpenAsync();
var readRequestGetName = new Workstation.ServiceModel.Ua.ReadRequest
{
NodesToRead = new[] {
new Workstation.ServiceModel.Ua.ReadValueId {
NodeId = Workstation.ServiceModel.Ua.NodeId.Parse(Workstation.ServiceModel.Ua.VariableIds.Server_ServerStatus),
AttributeId = AttributeIds.Value
}
}
};
var readResultName = await channel.ReadAsync(readRequestGetName);
var serverStatusGetName = readResultName.Results[0].GetValueOrDefault <Workstation.ServiceModel.Ua.ServerStatusDataType>();
serverName = serverStatusGetName.BuildInfo.ProductName;
ReadValueId[] reads = new ReadValueId[itemsNames.Count];
int index = 0;
names = new String[itemsNames.Count];
foreach (string name in itemsNames)
{
reads[index] = new Workstation.ServiceModel.Ua.ReadValueId
{
NodeId = Workstation.ServiceModel.Ua.NodeId.Parse("ns=4;s=|var|" + serverName + "." + name),
AttributeId = AttributeIds.Value
};
//MessageBox.Show(itemsNames.Count.ToString());
names[index] = name;
index++;
}
readRequest = new Workstation.ServiceModel.Ua.ReadRequest
{
NodesToRead = reads
};
}
catch (Exception ex)
{
await channel.AbortAsync();
MessageBox.Show(ex.Message);
}
}
public async Task SessionTimeoutCausesFault()
{
// get or add application certificate.
var localCertificate = this.localDescription.GetCertificate();
if (localCertificate == null)
{
throw new ServiceResultException(StatusCodes.BadSecurityChecksFailed, "Application certificate is missing.");
}
// discover available endpoints of server.
var getEndpointsRequest = new GetEndpointsRequest
{
EndpointUrl = this.endpointUrl,
ProfileUris = new[] { TransportProfileUris.UaTcpTransport }
};
Console.WriteLine($"Discovering endpoints of '{getEndpointsRequest.EndpointUrl}'.");
var getEndpointsResponse = await UaTcpDiscoveryClient.GetEndpointsAsync(getEndpointsRequest);
var selectedEndpoint = getEndpointsResponse.Endpoints.OrderBy(e => e.SecurityLevel).Last();
var selectedTokenType = selectedEndpoint.UserIdentityTokens[0].TokenType;
IUserIdentity selectedUserIdentity;
switch (selectedTokenType)
{
case UserTokenType.UserName:
selectedUserIdentity = new UserNameIdentity("root", "secret");
break;
case UserTokenType.Certificate:
selectedUserIdentity = new X509Identity(localCertificate);
break;
default:
selectedUserIdentity = new AnonymousIdentity();
break;
}
var channel = new UaTcpSessionChannel(
this.localDescription,
localCertificate,
selectedUserIdentity,
selectedEndpoint,
sessionTimeout: 10000);
Console.WriteLine($"Creating session with endpoint '{channel.RemoteEndpoint.EndpointUrl}'.");
Console.WriteLine($"SecurityPolicy: '{channel.RemoteEndpoint.SecurityPolicyUri}'.");
Console.WriteLine($"SecurityMode: '{channel.RemoteEndpoint.SecurityMode}'.");
await channel.OpenAsync();
Console.WriteLine($"Activated session '{channel.SessionId}'.");
// server should close session due to inactivity
await Task.Delay(20000);
// should throw exception
var readRequest = new ReadRequest {
NodesToRead = new[] { new ReadValueId {
NodeId = NodeId.Parse(VariableIds.Server_ServerStatus_CurrentTime), AttributeId = AttributeIds.Value
} }
};
await channel.ReadAsync(readRequest);
Console.WriteLine($"Closing session '{channel.SessionId}'.");
await channel.CloseAsync();
}
