topic Re: Ewon Connectivity with KepserverEX 5.8 in Kepware

Ewon Connectivity with KepserverEX 5.8

FA_12141316 — Mon, 16 Mar 2026 15:25:39 GMT

Hi,
I need to connect to KepserverEX 5.8 in a Windows 2000 Pro/Sp4 workstation with Ewon Flexy 205.
The goal is using the ewon (in this case 5 of them) as middle point to communicate s7-300 PLC with Wonderware 8.0 using KepserverEX 5.8 as the OPC server.
When configurating KepserverEX 5.8 channel i use OPC UA and configure UA server in the channel (see attachment 1) and when i try to import items on the device to import the tags of the Ewons an error appear (see attachement 2).
See attachement 3 for ewon configuration.

Any suggestion to address this?

Re: Ewon Connectivity with KepserverEX 5.8

ntripathi — Mon, 16 Mar 2026 16:28:30 GMT

Greetings @FA_12141316,

I hope you are doing well.

I apologize for the previous reply.

In the screenshot you shared, I noticed the error: “Bad_UserAccessDenied, 0x801F0000.”
This error is not recoverable under the OPC UA standard, which means the OPC UA Client is justified in stopping any further reconnection attempts.

This indicates that the issue may be related to the specific environment or security configuration. I would recommend testing the same setup in another environment to determine whether the problem is isolated to the current system.