Subscribing to OPC UA Events

General
1

Hello,

I am using Node-RED 3.0.2 with node-red-contrib-opcua 0.2.292.
I want to subscribe to events but I get no data and also no error.
Subscribing/reading normal nodes (ExtensionObjects) works fine.
If I subscribe to Events with uaExpert, I get the desired data:

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image1811Ă—883 74.2 KB

This is my flow:

    {
        "id": "ad464b54af5eb688",
        "type": "OpcUa-Event",
        "z": "3f73c5999eb84da2",
        "root": "i=2253",
        "activatecustomevent": false,
        "eventtype": "i=2041",
        "customeventtype": "ns=17;i=88",
        "name": "",
        "x": 380,
        "y": 2400,
        "wires": [
            [
                "f6954615cac75d82"
            ]
        ]
    },
    {
        "id": "cfe183dcfdf23d4d",
        "type": "inject",
        "z": "3f73c5999eb84da2",
        "name": "",
        "props": [],
        "repeat": "",
        "crontab": "",
        "once": true,
        "onceDelay": 0.1,
        "topic": "",
        "x": 190,
        "y": 2400,
        "wires": [
            [
                "ad464b54af5eb688"
            ]
        ]
    },
    {
        "id": "f6954615cac75d82",
        "type": "OpcUa-Client",
        "z": "3f73c5999eb84da2",
        "endpoint": "074b43a250e83847",
        "action": "events",
        "deadbandtype": "a",
        "deadbandvalue": 1,
        "time": "100",
        "timeUnit": "ms",
        "certificate": "n",
        "localfile": "",
        "localkeyfile": "",
        "securitymode": "None",
        "securitypolicy": "None",
        "folderName4PKI": "",
        "name": "OPC UA Client machine 11 S4 Events",
        "x": 630,
        "y": 2400,
        "wires": [
            [
                "f0a7bdfcba5aa42d"
            ]
        ]
    },
    {
        "id": "074b43a250e83847",
        "type": "OpcUa-Endpoint",
        "endpoint": "opc.tcp://10.10.151.71:62590",
        "secpol": "None",
        "secmode": "None",
        "none": false,
        "login": true,
        "usercert": false,
        "usercertificate": "",
        "userprivatekey": ""
    }
]

In both I used the Server Node and with the BaseEvent I should get all Events, like I get with uaExpert and checking all Types, right?

Did I make a mistake or is something missing?

Thanks!

2

Have you checked custom event type name space index? It seems to be quite big 17.
Is your server loading so many nodesets or creates new name spaces...???

"activatecustomevent": false, THIS SHOULD BE true!!
"eventtype": "i=2041",
"customeventtype": "ns=17;i=88",

3

Yes this is correct, it is copied from uaExpert. I don't know why it is this big. The OPC UA Server is provided by the manufacturer and I don't have any insights.

activatecustomevent was false because used the baseEventType at the time, maybe the customeventtype was still in there from previous setting.

I wanted to answer here that it works now but I couldn't this week.
So after using the correct customeventtype and a restart from the server everything works now. Even the eventdata is fetched correctly.

1 Like
4

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