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TypeScript ClientSession.readHistoryValue方法代码示例

本文整理汇总了TypeScript中node-opcua.ClientSession.readHistoryValue方法的典型用法代码示例。如果您正苦于以下问题:TypeScript ClientSession.readHistoryValue方法的具体用法?TypeScript ClientSession.readHistoryValue怎么用?TypeScript ClientSession.readHistoryValue使用的例子?那么恭喜您, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在node-opcua.ClientSession的用法示例。


在下文中一共展示了ClientSession.readHistoryValue方法的1个代码示例,这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞,您的评价将有助于系统推荐出更棒的TypeScript代码示例。

示例1: main


//.........这里部分代码省略.........
    // -----------------------------------------------------------------------------------------------------------------
    try {
        console.log(" ----------------------------------------------------------  Testing QueryFirst");
        const queryFirstRequest: QueryFirstRequestOptions =  {
            view: {
                viewId: NodeId.nullNodeId
            },

            nodeTypes: [
                {
                    typeDefinitionNode: makeExpandedNodeId("i=58"),

                    includeSubTypes: true,

                    dataToReturn: [{

                        attributeId: AttributeIds.AccessLevel,
                        relativePath: undefined
                    }]
                }
            ]};

        const queryFirstResult = await the_session.queryFirst(queryFirstRequest);
        console.log(" -----------------------------------------------------------------------------------------------------------------");
    } catch (err) {
        console.log(" Server is not supporting queryFirst err=",err.message);
    }
    // create Read
    if (doHistory) {

        console.log(" ---------------------------------------------------------- History Read------------------------");
        const now = Date.now();
        const start = now - 1000; // read 1 seconds of history
        const historicalReadResult = await the_session.readHistoryValue({
            nodeId: monitored_node
        }, new Date(start), new Date(now));
        console.log(" -----------------------------------------------------------------------------------------------------------------");
    }

    // ----------------------------------------------------------------------------------
    // create subscription
    // ----------------------------------------------------------------------------------
    console.log(" ----------------------------------------------------------  Create Subscription ");
    const parameters = {
        maxNotificationsPerPublish: 10,
        priority: 10,
        publishingEnabled: true,
        requestedLifetimeCount: 1000,
        requestedMaxKeepAliveCount: 12,
        requestedPublishingInterval: 2000
    };

    the_subscription = await the_session.createSubscription2(parameters);

    let t = getTick();

    console.log("started subscription :", the_subscription!.subscriptionId);
    console.log(" revised parameters ");
    console.log("  revised maxKeepAliveCount  ", the_subscription!.maxKeepAliveCount, " ( requested ", parameters.requestedMaxKeepAliveCount + ")");
    console.log("  revised lifetimeCount      ", the_subscription!.lifetimeCount, " ( requested ", parameters.requestedLifetimeCount + ")");
    console.log("  revised publishingInterval ", the_subscription!.publishingInterval, " ( requested ", parameters.requestedPublishingInterval + ")");

    the_subscription.on("internal_error", (err: Error) => {
        console.log(" received internal error", err.message);
    }).on("keepalive", () => {
        const t4 = getTick();
开发者ID:node-opcua,项目名称:node-opcua,代码行数:67,代码来源:simple_client.ts


注:本文中的node-opcua.ClientSession.readHistoryValue方法示例由纯净天空整理自Github/MSDocs等开源代码及文档管理平台,相关代码片段筛选自各路编程大神贡献的开源项目,源码版权归原作者所有,传播和使用请参考对应项目的License;未经允许,请勿转载。