The main method that we identified as troublesome is described here: We're trying to just do some basic writes using the latest DLLs in a windows service. Analysis was done using Code Profiling tools in Visual Studio and it appears that OPC client is taking biggest piece of execution time (see attachment).

One possible explanation is that this is because it is not sending to 'real' OPC server, and that it will work OK. What is the maximum supported load?Ģ) If this load is supported, what is the usual execution time to push this to OPC server?ģ) When we were testing this, we got that it worked for almost 10 minutes when invoking method from OPC client to push the data. OPC client method call returns 'Failure' for each field. We have 'QuickOPC Ultimate Site License With 1 Year Maintenance' and have the following issue:ġ) OPC client that is used can't accept data for approximately more than 700 items (DAItemValueArguments argumentsArray), and we have about 40 thousand. Why I received 2 failed at tick.etc and then I don't receive anything anymore? 8:39:50 AM: OPC Event 0: OPCLabs-UAEngine message:The OPC-UA client session on endpoint URL 'opc.tcp://10.74.137.71:49320' failed at tick 588491338 and will retry in 10000 milliseconds. 8:39:50 AM: OPC Event 0: OPCLabs-UAEngine message:The OPC-UA client session on endpoint URL 'opc.tcp://10.74.137.71:49320' failed at tick 588491307 and will retry in 10000 milliseconds. 8:39:50 AM: OPC Event 0: OPCLabs-UAEngine message:The OPC-UA client session has disconnected from endpoint URL 'opc.tcp://10.74.137.71:49320'. 8:39:50 AM: OPC Event 0: OPCLabs-UAEngine message:The OPC-UA client session is disconnecting from endpoint URL 'opc.tcp://10.74.137.71:49320'. These are the errors log I had from EasyUAClient.LogEntry. I'm using kepserverex 5.14 as opc ue server.

Sometimes I receive a disconnection for an unknown reason and I must restart the service to restore the application It run for days 24h by day with many opc ue tag subscriptions.

I have a windows service that implements an OPC UE client with library version 5.30.

Txt to kepserverex