How to use node-opcua-data-access - 10 common examples
To help you get started, we’ve selected a few node-opcua-data-access examples, based on popular ways it is used in public projects.
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node-opcua / node-opcua / packages / node-opcua-address-space-for-conformance-testing / src / address_space_for_conformance_testing.js View on Github 
const name = dataType + "ArrayAnalogDataItem";
const nodeId = "s=" + name;
// UAAnalogItem
const { engineeringUnitsRange, instrumentRange } = makeRange(dataType);
// add a UAAnalogItem
namespace.addAnalogDataItem({
componentOf: localParentFolder,
nodeId: nodeId,
browseName: name,
definition: "(tempA -25) + tempB",
valuePrecision: 0.5,
engineeringUnitsRange,
instrumentRange,
engineeringUnits: standardUnits.degree_celsius,
dataType: dataType,
value: new Variant({
arrayType: VariantArrayType.Array,
dataType: DataType[dataType],
value: [initialValue, initialValue, initialValue, initialValue, initialValue ]
})
});
}dataType: "Range",
minimumSamplingInterval: 0,
accessLevel: "CurrentRead | CurrentWrite",
value: new Variant({
dataType: DataType.ExtensionObject, value: new Range(options.instrumentRange)
}),
modellingRule: options.modellingRule ? "Mandatory" : undefined
});
instrumentRange.on("value_changed",handler);
}
if (options.hasOwnProperty("engineeringUnits")) {
const engineeringUnits = new EUInformation(options.engineeringUnits);
assert(engineeringUnits instanceof EUInformation, "expecting engineering units");
// EngineeringUnits specifies the units for the DataItem‟s value (e.g., DEGC, hertz, seconds). The
// EUInformation type is specified in 5.6.3.
const eu = namespace.addVariable({
propertyOf: variable,
typeDefinition: "PropertyType",
browseName: {name:"EngineeringUnits",namespaceIndex:0},
dataType: "EUInformation",
minimumSamplingInterval: 0,
accessLevel: "CurrentRead",
value: new Variant({
dataType: DataType.ExtensionObject, value: engineeringUnits
}),
modellingRule: options.modellingRule ? "Mandatory" : undefinedconst handler = variable.handle_semantic_changed.bind(variable);
euRange.on("value_changed",handler);
if (options.hasOwnProperty("instrumentRange")) {
const instrumentRange =namespace.addVariable({
propertyOf: variable,
typeDefinition: "PropertyType",
browseName: {name:"InstrumentRange",namespaceIndex:0},
dataType: "Range",
minimumSamplingInterval: 0,
accessLevel: "CurrentRead | CurrentWrite",
value: new Variant({
dataType: DataType.ExtensionObject, value: new Range(options.instrumentRange)
}),
modellingRule: options.modellingRule ? "Mandatory" : undefined
});
instrumentRange.on("value_changed",handler);
}
if (options.hasOwnProperty("engineeringUnits")) {
const engineeringUnits = new EUInformation(options.engineeringUnits);
assert(engineeringUnits instanceof EUInformation, "expecting engineering units");
// EngineeringUnits specifies the units for the DataItem‟s value (e.g., DEGC, hertz, seconds). The
// EUInformation type is specified in 5.6.3.// use as automatically scaling a bar graph display
// Sensor or instrument failure or deactivation can result in a return ed item value which is actually
// outside of this range. Client software must be prepared to deal with this possibility. Similarly a client
// may attempt to write a value that is outside of this range back to the server. The exact behaviour
// (accept, reject, clamp, etc.) in this case is server - dependent. However , in general servers shall be
// prepared to handle this.
// Example: EURange ::= {-200.0,1400.0}
const euRange = namespace.addVariable({
propertyOf: variable,
typeDefinition: "PropertyType",
browseName: {name:"EURange",namespaceIndex:0},
dataType: "Range",
minimumSamplingInterval: 0,
value: new Variant({
dataType: DataType.ExtensionObject, value: new Range(options.engineeringUnitsRange)
}),
modellingRule: options.modellingRule
});
const handler = variable.handle_semantic_changed.bind(variable);
euRange.on("value_changed",handler);
if (options.hasOwnProperty("instrumentRange")) {
const instrumentRange =namespace.addVariable({
propertyOf: variable,
typeDefinition: "PropertyType",
browseName: {name:"InstrumentRange",namespaceIndex:0},
dataType: "Range",
minimumSamplingInterval: 0,module.exports.NodeClassMask = require("node-opcua-data-model").NodeClassMask;
module.exports.AttributeIds = require("node-opcua-data-model").AttributeIds;
module.exports.AttributeNameById = require("node-opcua-data-model").AttributeNameById;
module.exports.BrowseDirection = require("node-opcua-data-model").BrowseDirection;
module.exports.VariableTypeIds = require("node-opcua-constants").VariableTypeIds;
module.exports.VariableIds = require("node-opcua-constants").VariableIds;
module.exports.MethodIds = require("node-opcua-constants").MethodIds;
module.exports.ObjectIds = require("node-opcua-constants").ObjectIds;
module.exports.ObjectTypeIds = require("node-opcua-constants").ObjectTypeIds;
module.exports.ReferenceTypeIds = require("node-opcua-constants").ReferenceTypeIds;
module.exports.DataTypeIds = require("node-opcua-constants").DataTypeIds;
// DA
module.exports.standardUnits = require("node-opcua-data-access").standardUnits;
module.exports.makeEUInformation = require("node-opcua-data-access").makeEUInformation;
module.exports.Range = require("node-opcua-data-access").Range;
//
module.exports.get_fully_qualified_domain_name = require("node-opcua-hostname").get_fully_qualified_domain_name;
module.exports.makeApplicationUrn = require("node-opcua-common").makeApplicationUrn;
// services
module.exports.browse_service = require("node-opcua-service-browse");
module.exports.read_service = require("node-opcua-service-read");
module.exports.write_service = require("node-opcua-service-write");
module.exports.call_service = require("node-opcua-service-call");
module.exports.session_service = require("node-opcua-service-session");
module.exports.AnonymousIdentityToken = module.exports.session_service.AnonymousIdentityToken;
module.exports.UserNameIdentityToken = module.exports.session_service.UserNameIdentityToken;module.exports.NodeClass = require("node-opcua-data-model").NodeClass;
module.exports.NodeClassMask = require("node-opcua-data-model").NodeClassMask;
module.exports.AttributeIds = require("node-opcua-data-model").AttributeIds;
module.exports.AttributeNameById = require("node-opcua-data-model").AttributeNameById;
module.exports.BrowseDirection = require("node-opcua-data-model").BrowseDirection;
module.exports.VariableTypeIds = require("node-opcua-constants").VariableTypeIds;
module.exports.VariableIds = require("node-opcua-constants").VariableIds;
module.exports.MethodIds = require("node-opcua-constants").MethodIds;
module.exports.ObjectIds = require("node-opcua-constants").ObjectIds;
module.exports.ObjectTypeIds = require("node-opcua-constants").ObjectTypeIds;
module.exports.ReferenceTypeIds = require("node-opcua-constants").ReferenceTypeIds;
module.exports.DataTypeIds = require("node-opcua-constants").DataTypeIds;
// DA
module.exports.standardUnits = require("node-opcua-data-access").standardUnits;
module.exports.makeEUInformation = require("node-opcua-data-access").makeEUInformation;
module.exports.Range = require("node-opcua-data-access").Range;
//
module.exports.get_fully_qualified_domain_name = require("node-opcua-hostname").get_fully_qualified_domain_name;
module.exports.makeApplicationUrn = require("node-opcua-common").makeApplicationUrn;
// services
module.exports.browse_service = require("node-opcua-service-browse");
module.exports.read_service = require("node-opcua-service-read");
module.exports.write_service = require("node-opcua-service-write");
module.exports.call_service = require("node-opcua-service-call");
module.exports.session_service = require("node-opcua-service-session");
module.exports.AnonymousIdentityToken = module.exports.session_service.AnonymousIdentityToken;
module.exports.UserNameIdentityToken = module.exports.session_service.UserNameIdentityToken;init(this: any) {
this.euInformation = new EUInformation({});
},
parser: {finish(this: any) {
this.euInformation = new EUInformation(this.euInformation);
}
}finish: function () {
this.euInformation = new EUInformation(this.euInformation);
}
}"use strict";
/*jslint bitwise: true */
const _ = require("underscore");
const DataValue = require("node-opcua-data-value").DataValue;
const Variant = require("node-opcua-variant").Variant;
const DataType = require("node-opcua-variant").DataType;
const NodeId = require("node-opcua-nodeid").NodeId;
const StatusCodes = require("node-opcua-status-code").StatusCodes;
const AttributeIds = require("node-opcua-data-model").AttributeIds;
const BaseNode = require("../base_node").BaseNode;
const part8 = require("node-opcua-data-access");
const AxisInformation = part8.AxisInformation;
const AxisScaleEnumeration = part8.AxisScaleEnumeration;
const Range = part8.Range;
const utils = require("node-opcua-utils");
const assert = require("node-opcua-assert").assert;
const VariantArrayType = require("node-opcua-variant").VariantArrayType;
const coerceLocalizedText = require("node-opcua-data-model").coerceLocalizedText;
const Namespace = require("../namespace").Namespace;
module.exports.install = function(AddressSpace) {
/**
*
* @method addYArrayItem
* @param options
* @param options.componentOf {NodeId}
* @param options.browseName {String}node-opcua-data-access
pure nodejs OPCUA SDK - module data-access
