name=Bad_NodeIdUnknown, value=0x80340000, quality=bad (opc ua milo WriteExample 关于 NodeId)

Question

我想做一个测试，通过 opc ua milo 客户端将“1”写入 kepware(PLC) 地址。我从 GitHub 获得客户端， URL 是 https://github.com/eclipse/milo 。但是我总是得到不准确的信息，像这样：

[main] INFO o.e.m.examples.client.WriteExample - StatusCode{name=Bad_NodeIdUnknown, value=0x80340000, quality=bad}

同时，我可以成功读取kepware(PLC)的数据。

我的 opc 标记名是“AFSM010_WriteRFID”，通道名是“FE6”，设备名是“AFSM”。那么，NodeId 的第二个参数是什么？ ??

public class WriteExample implements ClientExample {

    public static void main(String[] args) throws Exception {
        WriteExample example = new WriteExample();

        new ClientExampleRunner(example).run();
    }

    private final Logger logger = LoggerFactory.getLogger(getClass());

    @Override
    public void run(OpcUaClient client, CompletableFuture<OpcUaClient> future) throws Exception {
        // synchronous connect
        client.connect().get();

//        List<NodeId> nodeIds = ImmutableList.of(new NodeId(2, "HelloWorld/ScalarTypes/Int32"));
//        NodeId nodeId_Tag1 = new NodeId(3, "FE6.AFSM.AFSM010_WriteRFID");
        NodeId nodeId_Tag1 = new NodeId(3, "AFSM010_WriteRFID");
        List<NodeId> nodeIds = ImmutableList.of(nodeId_Tag1);

//        for (int i = 0; i < 10; i++) {
            Variant v = new Variant(5);

            // don't write status or timestamps
            DataValue dv = new DataValue(v, null, null);

            // write asynchronously....
            CompletableFuture<List<StatusCode>> f =
                client.writeValues(nodeIds, ImmutableList.of(dv));

            // ...but block for the results so we write in order
            List<StatusCode> statusCodes = f.get();
            StatusCode status = statusCodes.get(0);

            if (status.isGood()) {
                logger.info("Wrote '{}' to nodeId={}", v, nodeIds.get(0));
            }
        logger.info("this is the end : status " + status.toString());
//        }

        future.complete(client);
    }

}

Answer 1

我建议您使用 UaExpert 等客户端连接到 Kepware 并浏览地址 space，找到您感兴趣的节点，然后查看 Kepware 如何格式化NodeIds.

每台服务器都有自己的“规则”来制作 NodeId。在不知道该服务器的规则的情况下，您不能仅通过知道“标签名称”来派生 NodeId。

希望您通过浏览或通过某种您已经知道格式的带外机制发现节点和 NodeId。

name=Bad_NodeIdUnknown, value=0x80340000, quality=bad (opc ua milo WriteExample 关于 NodeId)

name=Bad_NodeIdUnknown, value=0x80340000, quality=bad (opc ua milo WriteExample about the NodeId)

java

identifier

opc-ua

milo