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Connecting to a PLC with anonymous users turned off

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25 Nov 2025 17:00 #14493 by support
Replied by support on topic Connecting to a PLC with anonymous users turned off
I cannot answer whether I am able to replicate the issue on my end, because I still do not understand what the issue is. Instead of keep saying that you have described it, please step back, assume that nothing has been said. and explain it from the beginning. Apparently there are some parts of the previous posts that no longer apply, and I do not know which they are, so this is the only way to get back on tracks.

I have described what happens what I run your project, I repeat it here for clarity:

When I run it as is, with "Allow anonymous login" in Kepware turned on, it successfuly connects, and after Reinitialize, it successfuly reconnects, which is expected.
When I run it as is, with "Allow anonymous login" in Kepware turned off, it always fails to connect (with BadUserAccessDenied), which is also expected.


When it is connected and I do not inject any disruptions (such as Reinitialize), it keeps giving me updates, and it stays connected.

Best regards
 

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25 Nov 2025 16:46 #14492 by Cwardltu
Replied by Cwardltu on topic Connecting to a PLC with anonymous users turned off
When I made the the stand a lone project for support I noticed that the issue persists even allow anonymous users turned on. Still the same issue.

There is no need for confusion, I have provided the sample project and opf file to replicate the issue as well as my personal logs; what I see when i start that project and reinitialize.

Could you please share what you are getting when you start that project then reinitialize kepware? Are you able to replicate the issue on your end? 

 

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25 Nov 2025 16:21 #14491 by support
Replied by support on topic Connecting to a PLC with anonymous users turned off
So we are working on a compeltely different issue than reported originally? 
The original report was about not being able to reconnect after you manually do Reinitialize on the server. There was no mentioning that is disconnects at other times.
I am VERY confused.
 

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25 Nov 2025 16:16 #14490 by Cwardltu
Replied by Cwardltu on topic Connecting to a PLC with anonymous users turned off
kep : 6.7.1046.0
opcLabs: 5.82.423

It consistently connects and reconnects within roughly 1 or 2 seconds. the log i posted is and example of 1 cycle of a disconnection and reconnection.

Were you able to reproduce with the code I provided? Can you share what your log displays?

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25 Nov 2025 15:55 #14489 by support
Replied by support on topic Connecting to a PLC with anonymous users turned off
What do you mean by "it connects then disconnects. the connection is never maintained. ". Are you saying that your code stops getting data all by itself, without you doing Reinitialize on the server side? If so, how often does that happen? Is that random, or regular?

Regards
 

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25 Nov 2025 15:43 #14488 by support
Replied by support on topic Connecting to a PLC with anonymous users turned off
Which version of QuickOPCm and of KepServerEX, are you using please?

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25 Nov 2025 13:23 #14487 by Cwardltu
Replied by Cwardltu on topic Connecting to a PLC with anonymous users turned off
Yes, it connects then disconnects. the connection is never maintained. 

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25 Nov 2025 10:21 - 25 Nov 2025 10:21 #14486 by support
Replied by support on topic Connecting to a PLC with anonymous users turned off
Hello.

But I can see in your screenshot that around 11:55:49.286, you start getting data updates again, and therefore the client has successfully reconnected.

But - maybe - you are complaining about the fact that the lines before, which come from the connection monitoring service, end with "Connected" state with a failure indication. Is that what you mean by saying that the reconnect has failed?

Best regards
 
Last edit: 25 Nov 2025 10:21 by support.

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24 Nov 2025 16:59 #14485 by Cwardltu
Replied by Cwardltu on topic Connecting to a PLC with anonymous users turned off
Here is the behavior I am observing. the expectation is that it would reconnect and hold on to that connection.
Attachments:

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24 Nov 2025 16:53 #14484 by Cwardltu
Replied by Cwardltu on topic Connecting to a PLC with anonymous users turned off
No from my end i am running the happy path. allow anon user turned on. I connect initially. i reinitialize. then it does not allow the reconnect..

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