search

mikakaraila / node-red-contrib-opcua

A Node-RED node to communicate OPC UA. Uses node-opcua library.
Other
214 stars 196 forks source link

Using "method" action with OPC UA Client node #607

Open afagundesm opened 1 year ago

afagundesm commented 1 year ago

Hi,

I am trying to use the action "method" with OPC UA Client node to call a method, instead of using the OPC UA Method node. In my function node that is connected to the OPC UA Client node I have tried the following code:

msg.action = "method"; msg.methodId = "ns=4;s=Demo.SetSimulationSpeed"; msg.inputArguments = [{ "dataType": "UInt32", "value": 25 }]; return msg;

After checking the code behind the node https://github.com/mikakaraila/node-red-contrib-opcua/blob/master/opcua/102-opcuaclient.js make me think this parameters should be enough to work: 933 async function callMethod(msg) { 934 if (msg.methodId && msg.inputArguments) { 935 verbose_log("Calling method: " + JSON.stringify(msg.methodId)); 936 verbose_log("InputArguments: " + JSON.stringify(msg.inputArguments)); 937 verbose_log("OutputArguments: " + JSON.stringify(msg.outputArguments));

I have also tried adding the ObjectNodeId in msg.topic or in msg.nodeId, but with no luck. I am still getting messages like: "Execute method result, error:The node id refers to a node that does not exist in the server address space." or "OPCUA Client to Call Method: can't work without OPC UA NodeId - msg.topic empty" when not using the msg.topic. Any ideas of what I am doing wrong here?

Thanks in advance.

mikakaraila commented 1 year ago

You are missing objectId (nodeId of the parent object): image