failed to connect to opcda://localhost/OPCServer.WinCC

See original GitHub issue

I can successfully connect to local Kepware OPC Server with the h-opc-cli h-opc-cli.exe da opcda://localhost/Kepware.KEPServerEX.V6

However, when I am trying to connect to a Siemens WinCC V7.3 OPC DA Server (OPC Data Access 2.0), I got the below exception. h-opc-cli.exe da opcda://localhost/OPCServer.WinCC h-opc-cli v0.9.0 An error occured when trying connecting to the server The application ended unexpectedly. System.Runtime.InteropServices.ExternalException (0x80004005): CoCreateInstanceEx: The specified service does not exist as an installed service.

I am pretty sure that the WinCC OPC Server is working normally. Because I can use Prosys OPC Client to connect to it and browse and monitor tag values.

Is it a bug or is there some way to connect to a WinCC V7.3 OPC DA Server? Many thanks in advance!

Issue Analytics

State:
Created 6 years ago
Comments:7 (3 by maintainers)

Top GitHub Comments

1reaction

militiaonlycommented, Nov 3, 2017

@jmbeach Thanks for your input. I will double check all the settings. But I think in my test there should not be any DCOM issue. Because both the server and client are in the same “localhost” windows 10 OS. Later I will publish more test results.

0reactions

jmbeachcommented, Nov 10, 2017

@militiaonly Glad to hear that. If you find that there is a specific configuration of WinCC that can cause issues, let me know