I’m new to Automation Studio (using v 6.0.2.177), and I’m trying to learn to program via ARSim. I setup a test project with a Standard PC and transferred a simple program. When I click the ‘monitor’ button, I get an error of “Connection to OPC UA server not possible.”

That seems to be the fix. It’s strange that disabling OPC UA in v4.9 creates no issues, but disabling it in v6.0 causes an error. Thanks for your help. I did actually just find this explained in the help file, and does explain why a ladder program has this issue, but not a text program: “Ladder …

Hi David, just tried this. And no, I don’t get the fault. Are you sure this message is from AS ? Find my simple project attached. Regards, xxx.zip (63.8 KB)

Christoph, Thanks for the sample project. Yes, your program runs fine. My project has a ladder program, which now seems to be what the issue is. When I add a ladder program to your project, I get the same OPC UA error. Strangely, my ladder program simulates just fine on v4.9. And the ladder pr…

Hi, i see, you started here: B&R Online Help if you just follow the tutorial then you probably get this: [image] yep. it seems the configuration of OPC-UA and the user/role settings are missing in this tutorial [image] [image] if you miss the user/ role and activate the Monitor AS asks for…

ARSim monitoring - "Connection to OPC UA server not possible"

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kovarj (Jaroslav Kovar) Split this topic November 12, 2025, 6:50am 6

4 posts were split to a new topic: Port conflict causing OPC UA failure

Topic		Replies	Views
Connection to OPC UA Server not possible error when activate ARSim monitoring B&R Software & Runtime opc-ua	2	65	March 4, 2026
Port conflict causing OPC UA failure B&R Software & Runtime opc-ua	3	103	November 10, 2025
Scene Viewer with ARSim B&R Software & Runtime automation-studio , automation-runtime	4	415	January 2, 2025
OPC-UA BadSecureChannelClosed with simulator active B&R Software & Runtime opc-ua	2	116	September 9, 2025
Does the OPC UA client work on an Arsim B&R Software & Runtime automation-runtime , opc-ua , arsim	3	300	June 11, 2024

ARSim monitoring - "Connection to OPC UA server not possible"

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