Unable to write values to the OPC UA server

[Steve-Mcl]

@SK_30

Following is my new code in function node.

msg.payload = {
    nodetype: 'inject',
    injectType: 'write',
    addressSpaceValues: 'ns=1;s=ExitStation',
    valuesToWrite: msg.payload
}
return msg;

The write node requires the following data as input.

Input:
payload (value to write one or all)
topic
addressSpaceItems or nodesToWrite (Array of Node-Ids)
nodetype (inject)
injectType (write)
valuesToWrite (Array of values or objects to write individual)

If the node needs the above format - why are you setting it up differently?

try...

msg.topic = ""
msg.nodetype ="inject"
msg.injectType = "write"
msg.addressSpaceItems = [
    {"name":"","nodeId":"ns=1;s=ExitStation","datatypeName":"Boolean"}
]
	
msg.valuesToWrite = [
    msg.payload
]
return msg;

Untested: this was formed from info in this post: Issue with opcua and s7 -> OPCServer in node red with many tags

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Lastly, have you checked out the built in examples?

ctrl-i → examples