How to transmit String data to the OPC UA server?

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CH.Lee asked May 23, '24 CH.Lee answered Jul 8, '24

How to transmit String data to the OPC UA server?

I am currently working on a project to connect a Flexsim project to an OPCUA server.

While data values of Boolean or int data types are successfully transmitted to the OPCUA server, I am encountering an issue where string data is not being transmitted.

The server settings have the Sensor tag's data type set to String.

I have verified from the Kepserver manual, which is the OPC server being used, that string data is supported in the form of Null-terminated Unicode strings.

How can I transmit Null-terminated Unicode string values from Flexsim to the OPCUA server?

Software Version:

FlexSim 24.1.0

emulation string opcua unicode sensortag

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Jeanette F ♦♦ commented · May 24 at 10:55 PM

@Luciano Cavallero, @Tancredi Canonico, @Fiorenzo A, can you please take a look at this emulation-related question?

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CH.Lee Jeanette F ♦♦ commented · Jun 27 at 07:06 AM

@Luciano Cavallero, @Tancredi Canonico, @Fiorenzo A

I hope this message finds you well.

I'm writing to follow up on my previous inquiry regarding.

It has been a month since I submitted my question, and I was wondering if you could provide an update on the status of my request.

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Luciano Cavallero commented · Jul 01 at 12:39 PM

Hi,

strings are supported by the OPC UA connector.

Below a screenshot with a simple test: one le left Flexsim read the value of the variable connected to a exported OPC UA KerServer tag (in the middle) written by a OPC client (on the right)

Are you able to reproduce the same configuration?

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1719837400794.png (346.6 KiB)

CH.Lee Luciano Cavallero commented · Jul 03 at 12:16 AM

Thanks for your respose.

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Jason Lightfoot ♦ CH.Lee commented · Jul 03 at 11:21 AM

Did Luciano's comment solve your issue? If so we'll change his post to an answer for you to accept.

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Answer 1 · 2024-07-04T23:37:30Z

CH.Lee answered Jul 4, '24

The problem I had was that when I changed the value from Flexsim to Sensor Variable to String data, the OPC-UA server outputs a value such as String 0, or String 1, and it does not change anymore.

At this time, other types of data could be transmitted and received without problems.

This was why I expressed that the question I intended was not the answer.

However, Referring to your answer, when I checked the Sensor Variable value by entering the command in the Script Console, I confirmed that the Sensor Variable value was changed normally to String data, and I determined that there was a problem with the OPC-UA server setting.

Interestingly, when I reduced the length of the character of the device name and removed the space, the String data was sent to the server correctly.

As a result, I was able to find out how to confirm that it was not a problem of Emulation through your answers, and I am grateful that I could get a clue to solving the problem.

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