本文整理匯總了TypeScript中node-opcua.ClientSession.readHistoryValue方法的典型用法代碼示例。如果您正苦於以下問題：TypeScript ClientSession.readHistoryValue方法的具體用法？TypeScript ClientSession.readHistoryValue怎麽用？TypeScript ClientSession.readHistoryValue使用的例子？那麽, 這裏精選的方法代碼示例或許可以為您提供幫助。您也可以進一步了解該方法所在類node-opcua.ClientSession的用法示例。
在下文中一共展示了ClientSession.readHistoryValue方法的1個代碼示例，這些例子默認根據受歡迎程度排序。您可以為喜歡或者感覺有用的代碼點讚，您的評價將有助於係統推薦出更棒的TypeScript代碼示例。
示例1: main
//.........這裏部分代碼省略.........
// -----------------------------------------------------------------------------------------------------------------
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();