OPC UA server model via Nodeset XML

Fe_lipe

Hello IOT2000 community!

This example will show you how to:

1. Create an own OPC UA information model
2. Export the OPC UA model as a Nodeset XML file
3. Run an OPC UA server on the IOT2000 with the created model

To create an OPC UA model, a tool by Siemens named SiOME is used. Alternatively other modelling tools such as Free OPC UA Modeler can be used.

To create a new model in SiOME, start by adding a new Namespace, then editing the model in the 'information model' section. Check the documentation for more detailed information on SiOME.

After completing the model, simply export the XML file.

• Make sure example image V2.1.3 or above is running on the IOT
• Download the provided attachment and transfer the zip file onto IOT using WinSCP
• Unzip the file on the IOT and enter the program folder:

unzip opcua-server.zip

cd opcua-server

• To import your own model, replace 'mymodel.xml' with your XML file. Either keep the same filename or edit 'app.js' Line 12 using your desired filename.
• Start the application by typing

node app.js

The endpoint url will be displayed once the server has started. You can connect to the OPC UA Server with UaExpert.

Kind regards!

 Hi Fe_lipe,

thank you for your example, very useful and much better perfomance than OPCUA Server with node-red.

I have some problems with the SiOME model. I'm using "UInt32" and "Int32" datatype, and if I use this datatypes my variables have Status "BadWaitingForInitialData", also if I use "value" parameter of variables. If I change datatype to "Double" or "Float" the application run well and my variables have Status "Good" with the right value inside the model.

Do you have any suggestion?

BTW, I made some modification to your example because I had some problems and I would like to share them:

• I had some problems regarding certificate, so I generated new private_key.pem and certificate.pem with OpenSSL and inserted their path into new OPCUAServer object in app.js.

Fe_lipe

Hello,

Sorry for the late response, I didn't see this until now for whatever reason. 

Could you provide the XML file? Would make it easier for me to reproduce.

If I remember corrently node-opcua had some issues initializing certain variable types with the nodeset loader. But maybe they have made some improvements until now, could you try to update your packages with

npm update

 

Thanks for the info regarding certificates and hostname!

Kind regards!

 Yes, the only recognized datatypes for numbers are Float or Double..Int and others numeric datatype will give you error if you load it from XML.

Hi!

There is any solution for Integer values? 

Thanks!

SOLVED! I can read and write Integers!!

See Attached PDF

Best regards!

Is it possible to add a username and password to the OPCUA server using this method?

Also thanks to everyone in this thread. This is the only way I've been able to reliably run a OPCUA server on the 2040.

Thanks,

Luke