Value Min/ Max Range or limit

[embbo]

Description

Background Information / Reproduction Steps

Is there anything like 'Range' with a min- or max-value available ?
How can I set from the out-side or cleint ? that each varibale have maximum or minimum value is that ?
e.g
Node : XYZ ; DT Int32
min 10- max 100
other min and max values could be discarded

Used CMake options:

cmake -DUA_NAMESPACE_ZERO=<YOUR_OPTION> <ANY_OTHER_OPTIONS> ..

Checklist

Please provide the following information:

• open62541 Version (release number or git tag):
• Other OPC UA SDKs used (client or server):
• Operating system:
• Logs (with UA_LOGLEVEL set as low as necessary) attached
• Wireshark network dump attached
• Self-contained code example attached
• Critical issue

[mlang-de]

What you are searching for is imho the OPC UA DataType Range, see here:
https://reference.opcfoundation.org/v104/Core/docs/Part8/5.6.2/
To use this in an OPC UA common way you can use the VariableType BaseAnalogType and/or its subtypes.
https://reference.opcfoundation.org/v104/Core/docs/Part8/5.3.2/#5.3.2.2

[embbo]

@mlang-de
_UA_Server_addVariableNode(mUaServer, myIntegerNodeId, parentNodeId, parentReferenceNodeId, myIntegerName, UA_NODEID_NUMERIC(0, UA_NS0ID_ANALOGITEMTYPE), attr, NULL,NULL);`
this is rigth ? or i am missing something ?

[mlang-de]

1. _UA_Server_addVariableNode seems not to be the public Server API, but it should work anyway
2. yes it looks ok, but why you are not testing it? Maybe you must include this VariableType into your server or may use the full Base Nodeset2 file/information model.

[embbo]

@mlang-de
I tested .but i can't see node in ua expert if I used like that ?
UA_NODEID_NUMERIC(0, UA_NS0ID_ANALOGITEMTYPE)

but can see when using this

UA_NODEID_NUMERIC(0, UA_NS0ID_BASEDATAVARIABLETYPE), attr, NULL, NULL);

[mlang-de]

Imho you do not check the return value from _UA_Server_addVariableNode.
My look into the crystal ball supposed that the AnalogItemType is not part of your base information model.
May be enable UA_NAMESPACE_ZERO FULL by CMake.

[embbo]

@mlang-de okay it works fine .. But can i set these values in information model. xml?

[mlang-de]

Yes. For builtin type it could like this:

<Value>
  <uax:String>1.0.0</uax:String>
</Value>

But a Range is a structured DataType so it should like this.

<UAVariable DataType="Range" ParentNodeId="ns=1;i=6022" NodeId="ns=1;i=6023" BrowseName="EURange">
    <DisplayName>EURange</DisplayName>
    <References>
        <Reference ReferenceType="HasProperty" IsForward="false">ns=1;i=6022</Reference>
        <Reference ReferenceType="HasTypeDefinition">i=68</Reference>
    </References>
    <Value>
        <uax:ExtensionObject>
            <uax:TypeId>
                <uax:Identifier>i=885</uax:Identifier>
            </uax:TypeId>
            <uax:Body>
                <uax:Range>
                    <uax:Low>0</uax:Low>
                    <uax:High>100</uax:High>
                </uax:Range>
            </uax:Body>
        </uax:ExtensionObject>
    </Value>
</UAVariable>

I never test this with open62541, but in theory it should work.

[embbo]

okay great thank you .. 1 last question may be you can answer .
Can I add my own data (int , strings ) in this xml. like
<UAVariable Sensor address ="101010" DataType="Range" ParentNodeId="ns=1;i=6022" NodeId="ns=1;i=6023" BrowseName="EURange">

[mlang-de]

What do you mean with "own data"?
You must respect the xsd schema, so your example

<UAVariable Sensor address ="101010" DataType="Range" ParentNodeId="ns=1;i=6022" NodeId="ns=1;i=6023" BrowseName="EURange">

looks wrong.
Use a suitable XML Modeller and use the related schema from here https://github.com/OPCFoundation/UA-Nodeset/blob/v1.04/Schema/UANodeSet.xsd

For example

<UAVariable DataType="String" ParentNodeId="ns=1;i=5001" NodeId="ns=1;i=6007" BrowseName="2:ManufacturerUri">
    <DisplayName>ManufacturerUri</DisplayName>
    <References>
        <Reference ReferenceType="HasProperty" IsForward="false">ns=1;i=5001</Reference>
        <Reference ReferenceType="HasModellingRule">i=80</Reference>
        <Reference ReferenceType="HasTypeDefinition">i=68</Reference>
    </References>
</UAVariable>

[embbo]

@mlang-de : I mean e.g, I have 50 nodes each node has node Id but with node Id i have to send somedata e.g. 101010 for heat sensor address 1010102 for temperature sensor. Data of both nodes is in Float but I need to send 101010 or 1010102 . How can I put this data xml.

[mlang-de]

Imho this is not part of an XML. In an XML only default/initial values should be defined.
To connect a variable with real application data see for instance https://github.com/open62541/open62541/blob/master/examples/tutorial_server_datasource.c
and/or
https://github.com/open62541/open62541/blob/master/examples/tutorial_server_variable.c

[embbo]

@mlang-de
I have another question; if you can answe..
I have data type float but I want to put limits around this float like between 0 to 1 .. other values can discarded .. do you hav any idea , if I can write this in XML

[mlang-de]

Imho you have to implement this by your own with the data source callbacks and is not part of the open62541 server and no way to "define" this within the XML. The XML describes the information model no implementation logic.
But maybe I am wrong.

[embbo]

okay thank you :)