I am attempting a proof of concept example of Live Mapping an object in our system to an OPC UA device, in this case the 'Device1' that is the sample object provided by Kepware's Simulator driver. I am basing this code off of the ConsoleUALiveMapping sample in the Knowledgebase.
Sample code to do a read of the value I am trying to map(This works):
Code:
//test = new UAAttributeData();
// Define the target controls, the OPC data we want to monitor, and how fast.
var arguments = new[]
{
new EasyUAMonitoredItemArguments(test, uri,"ns=2;s=Channel1.Device1.Tag1",1000)
};
// Hook the event handler, and subscribe to OPC data
_client.DataChangeNotification += ClientOnDataChangeNotification;
_handles = _client.SubscribeMultipleMonitoredItems(arguments);
Now the this is the object I am trying to map to.:
Code:
[UANamespace("KEPServerEX")]
[UAType]
public class OPCDevice : INotifyPropertyChanged
{
public event PropertyChangedEventHandler PropertyChanged;
private void OnPropertyChanged([CallerMemberName]string property = null)
{
PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(property));
}
[MetaMember("NodeDescriptor")]
public UANodeDescriptor NodeDescriptor { get; set; }
[UANode(BrowsePath ="/Tag1"), UAData]
public UInt16 Tag1
{
get => _tag1;
set { _tag1 = value; OnPropertyChanged(); }
}
private UInt16 _tag1;
}
and the code to preform the mapping:
Code:
private void Map()
{
UAEndpointDescriptor endpointDescriptor = uri;
Device = new OPCDevice();
_mapper.Map(Device, new UAMappingContext
{
EndpointDescriptor = endpointDescriptor,
// The NodeDescriptor below determines where in the OPC address space we want to map our data to.
NodeDescriptor = new UANodeDescriptor
{
// '#' is a reserved character in a browse name, and must be escaped by '&' in the path below.
BrowsePath = UABrowsePath.Parse("[ObjectsFolder].Channel1/Device1", "KEPServerEX")
},
MonitoringParameters = 1000, // requested sampling interval (for subscriptions)
});
_mapper.Subscribe(true);
}
This results the exception being thrown:
Code:
OPC-UA service result - An error specific to OPC-UA service occurred.
---- SERVICE RESULT ----
Status Code: {BadNoMatch} = 0x806F0000 (2154758144)
with no inner exception.
The kepware diagnostic log of the transaction:
Code:
9/30/2019 10:09:19.023 AM [OpcLabs.EasyOpc.UA.Implementations.NetSdk.Internal.EasyUASession;5.54.1311.1@PFC-DEVELOPERPC/11628:1;1] TranslateBrowsePathsToNodeIdsRequest
0000000000: Event started
0000000000: Request Header:
0000000000: authenticationToken: i=1283819093
0000000000: timestamp (UTC): 2019-09-30T14:09:19.022
0000000000: requestHandle: 9
0000000000: returnDiagnostics: 0
0000000000: auditEntryId: [empty]
0000000000: timeoutHint(ms): 0
0000000000: Parameters:
0000000000: relativePath []: Size: 1
0000000000: relativePath [ 0 ]:
0000000000: startingNode: i=85
0000000000: relativePathElement []: Size: 3
0000000000: relativePathElement [ 0 ]:
0000000000: referenceTypeId: i=44
0000000000: isInverse: 0
0000000000: includeSubtypes: 1
0000000000: targetName: ns=2|Channel1
0000000000: relativePathElement [ 1 ]:
0000000000: referenceTypeId: i=44
0000000000: isInverse: 0
0000000000: includeSubtypes: 1
0000000000: targetName: ns=2|Device1
0000000000: relativePathElement [ 2 ]:
0000000000: referenceTypeId: i=33
0000000000: isInverse: 0
0000000000: includeSubtypes: 1
0000000000: targetName: ns=2|Tag1
0000000000: Event complete
9/30/2019 10:09:19.023 AM [OpcLabs.EasyOpc.UA.Implementations.NetSdk.Internal.EasyUASession;5.54.1311.1@PFC-DEVELOPERPC/11628:1;1] TranslateBrowsePathsToNodeIdsResponse
0000000000: Event started
0000000000: Response Header:
0000000000: timestamp (UTC): 2019-09-30T14:09:19.023
0000000000: requestHandle: 9
0000000000: serviceResult: 0x00000000 (Good)
0000000000: Parameters:
0000000000: translateResults []: Size: 1
0000000000: translateResults [ 0 ]:
0000000000: statusCode: 0x806f0000 (BadNoMatch)
0000000000: targets []: Size: 0
0000000000: Event complete
So I'm trying to figure out why the TranslateBrowsePathsToNode is failing. I confirmed that 'KEPServerEX' is namespace ns=2 in this instance, and the path seem to match. Is there something obvious that I am missing?
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