- Siemens Opc Server
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- Siemens Opc Ua Server
Fast OPC servers for Siemens are based on COM/DCOM technology following OPC specification and supports S7 MPI serial Profibus communication and S7 TCP/IP protocol on Ethernet and it can be used with Siemens PLC controllers. The server provides reliable and high-performance communication with any OPC-compatible HMI, SCADA, or any other OPC client application. An easy-to-use configuration tool is included for quick set-up of the tags database. Fast, active OPC foundation member creates specific communication drivers according to customers requirements.
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I tryed to connect to OPC UA server using the client provided on this page: https://support.industry.siemens.com/cs/document/42014088/programming-an-opc-ua-net-client-with-c%23-for-the-simatic-net-opc-ua-server?dti=0&lc=en-US . Connection to OPC UA server using the Siemens OPC Scount v10 works fine. When connecting to the OPC UA server using client provided in the article, I get this message:
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- The OPC DA server then distributed the PLC data to the OPC clients. Siemens OPC Scout V10 and Matlab DAQ were used as OPC Clients. All communication were carried out over Ethernet. Network configurations and PLC programming were done in Siemens STEP-7 and NETPRO. Teammitglieder: Fahad Ali Khan.
Could not open UA TCP request channel.
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Stack trace of the exception is this: Special edition austin.
Any help would be appreciated. OPC UA server runs on Siemens Simatic HMI TP700 Comfort. Configuration on the OPC UA server is default.
After andrewcullen tip, we are getting the below log in the tracelog.txt file and error when catching the exception that says
Siemens Opc Server
An unexpected error occurred while connecting to the server.
I got the answer from the Siemens official support:
The application was not tested with Comfort Panel. The code e.g. contains Block Read and Block Write which is not supported from the Panel Server. So this application will not work.
Gašper Sladič
Gašper SladičGašper Sladič65122 gold badges1313 silver badges2929 bronze badges
2 Answers
This Siemens UaClient uses a library 'ClientAPI' which extends the OPC Foundation's Opc.Ua.Core and Opc.Ua.Client. ClientAPI has a lot of nice Helper functions to simplify connecting and subscribing. However, I see in the code for Connect(string Url) that it is using the original WCF-style channel. And your stack trace is showing the WCF types are throwing an exception that is hard to diagnose. I would change two things:
First configure tracing to write to a file. In ClientAPI, find Helpers.CreateClientConfiguration() and add
Second, upgrade the channel type used to connect. In ClientAPI, find Server.Connect(string url) and modify the middle as shown:
Edit 2/4:
From the tracelog you might find certificate errors. When creating a new session, the client and server both provide and validate each others certificate. By default, UaClient is retrieving it's cert from the windows store LocalMachineMy (aka Personal). The api generates this cert during it's first run, (which requires the first run as administrator) ( to see this cert, run 'certlm.msc').
Siemens Opc Scout V10 Google Docs
On the server machine, the server will validate the client's cert, by checking if it matches the certs in its 'TrustedPeerList'. Servers usually use a directory to store the trusted certs. If the client cert is not trusted, the server will copy the client's cert to a 'RejectedCertificates' directory. You are required to copy the cert you find in 'RejectedCertificates' to the trusted cert directory.
Back on the client machine, the client will validate the server's cert. This client uses a windows store for validation 'LocalMachineMy' (aka Personal).Instead of using a 'Rejected' directory, the client registers an event handler that opens a message box, asking if you wish to accept the server's cert. If you choose to accept, the client sets the eventArg e.Accept = true; To suppress the message box, the server's cert should be imported into the client's 'LocalMachineMy' (aka Personal) using the tool 'certlm.msc'.
Siemens Opc Scout V10 Google Maps
Andrew CullenAndrew Cullen
Try to ping the server with DNS name. If the server is not accessible the Hosts file in C:WindowsSystem32driversetc.. must be edited. Open the notepad as administrator, then open the Hosts file and enter the mapping of IP Address to the host name as follows:
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xxx.xxx.xxx.xxx host name
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