OPC UA Server on Codesys, OPC UA Client on Labview

[mgele]

Hello everybody

I have a OPC UA Server on Codesys and it works on its own. I want to send now a few variables to an OPC UA Client on Labview. My block diagram is in the picture.

I Always get the error message: "OPC UA Toolkit: The operation timed out." What is wrong with my block diagram? Is the problem the NodeID?

Here is the URL and the NodeID from UAExpert:

Thaks for every help

mgele

[mgele]

I just inserted some probes to analyse the problem and it seems that the connection to the OPC UA server itself is the problem. 

The URL should be correct because with UAExperts it works with this URL

Does anybody know what the problem could be?

[Andrey_Dmitriev]

If nothing wrong with security, then a very first suggestion — try to remove ".button" from NodeId, I don't see this in UA Expert (or you show screenshot not from exact this node):

This is how it looks in my case (B&R PLC) - i checked with both Byte and Variant:

Code:

UA Expert:

Complete Node Attributes:

And result:

And check error code, of course, if any.

[mgele]

Hi Andrey

Thanks for your reply. 

I tried to remove .button but it still doesnt work. What coud be wrong with security?

mgele

[Andrey_Dmitriev]

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@mgele wrote:

Hi Andrey

Thanks for your reply. 

I tried to remove .button but it still doesnt work. What coud be wrong with security?

mgele

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For example, your PLC Strictly required to have Sha256, but NI OPC UA Toolkit cannot do that, its unsupported.

If I will set security option on B&R Side like this: prohibit everything except Sha256, then it will stop working (but you should see error on the Connect):

I'll check shortly what happened then, need to restart PLC.

And try to set Flag "Trust any server" in LabVIEW, it is False by default.

[Andrey_Dmitriev]

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@Andrey_Dmitriev wrote:

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I'll check shortly what happened then, need to restart PLC.

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OK, tested.

With unsupported security you will get the following error:

Also check user name/password if it not set on PLC side, but also in this case you should have an error.

[mgele]

Hi Andrey

I dont have any security on my PLC:

[Andrey_Dmitriev]

Then may be you accessing wrong NodeId (for example containing folder and not variable).

This is how it looks in my case, you should drag node to the list, then check that the connection is good and then note NodeId:

Can you please show complete NodeId attrubutes from UA expert which you attempting to access?

[mgele]

Hi Andrey

Thanks that you tanking s much time for me.

Here is my NodeID:

 

[Andrey_Dmitriev]

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@mgele wrote:

Hi Andrey

Thanks that you tanking s much time for me.

Here is my NodeID:

 

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You're welcome, but I have no more ideas, because the NodesID are identical with your first screenshot (so, the ".button" should be here against my first suggestion) and usually if they are identical, then it works (I checked this in the past also with Siemens OPC UA Server and self-made LabVIEW Server).

May be OPC UA don't like "|" character (needs to be checked), but I don't see any difference. Any you have really no any error when you hit Stop Button?