/// <summary>
        /// Returns a snapshot of the tags belonging to the block.
        /// </summary>
        /// <returns>The list of tags. Null if the block does not exist.</returns>
        public IList <UnderlyingSystemTag> GetTags()
        {
            lock (_tags) {
                // create snapshots of the tags.
                var tags = new UnderlyingSystemTag[_tags.Count];

                for (var ii = 0; ii < _tags.Count; ii++)
                {
                    tags[ii] = _tags[ii].CreateSnapshot();
                }

                return(tags);
            }
        }
        /// <summary>
        /// Updates the metadata for a tag.
        /// </summary>
        private bool UpdateTagMetadata(
            UnderlyingSystemTag tag,
            Opc.Ua.Test.TestDataGenerator generator)
        {
            switch (tag.TagType)
            {
            case UnderlyingSystemTagType.Analog: {
                if (tag.EuRange != null)
                {
                    var range = new double[tag.EuRange.Length];

                    for (var ii = 0; ii < tag.EuRange.Length; ii++)
                    {
                        range[ii] = tag.EuRange[ii] + 1;
                    }

                    tag.EuRange = range;
                }

                break;
            }

            case UnderlyingSystemTagType.Digital:
            case UnderlyingSystemTagType.Enumerated: {
                if (tag.Labels != null)
                {
                    var labels = new string[tag.Labels.Length];

                    for (var ii = 0; ii < tag.Labels.Length; ii++)
                    {
                        labels[ii] = generator.GetRandomString();
                    }

                    tag.Labels = labels;
                }

                break;
            }

            default: {
                return(false);
            }
            }
            return(true);
        }
Пример #3
0
        /// <summary>
        /// Updates a variable from a tag.
        /// </summary>
        /// <param name="context">The context.</param>
        /// <param name="tag">The tag.</param>
        /// <param name="variable">The variable to update.</param>
        private void UpdateVariable(ISystemContext context, UnderlyingSystemTag tag, BaseVariableState variable)
        {
            System.Diagnostics.Contracts.Contract.Assume(context != null);
            variable.Description = tag.Description;
            variable.Value       = tag.Value;
            variable.Timestamp   = tag.Timestamp;

            switch (tag.DataType)
            {
            case UnderlyingSystemDataType.Integer1: { variable.DataType = DataTypes.SByte; break; }

            case UnderlyingSystemDataType.Integer2: { variable.DataType = DataTypes.Int16; break; }

            case UnderlyingSystemDataType.Integer4: { variable.DataType = DataTypes.Int32; break; }

            case UnderlyingSystemDataType.Real4: { variable.DataType = DataTypes.Float; break; }

            case UnderlyingSystemDataType.String: { variable.DataType = DataTypes.String; break; }
            }

            variable.ValueRank       = ValueRanks.Scalar;
            variable.ArrayDimensions = null;

            if (tag.IsWriteable)
            {
                variable.AccessLevel     = AccessLevels.CurrentReadOrWrite;
                variable.UserAccessLevel = AccessLevels.CurrentReadOrWrite;
            }
            else
            {
                variable.AccessLevel     = AccessLevels.CurrentRead;
                variable.UserAccessLevel = AccessLevels.CurrentRead;
            }

            variable.MinimumSamplingInterval = MinimumSamplingIntervals.Continuous;
            variable.Historizing             = false;

            switch (tag.TagType)
            {
            case UnderlyingSystemTagType.Analog: {
                var node = variable as AnalogItemState;

                if (tag.EuRange != null)
                {
                    if (tag.EuRange.Length >= 2 && node.EURange != null)
                    {
                        var range = new Range(tag.EuRange[0], tag.EuRange[1]);
                        node.EURange.Value     = range;
                        node.EURange.Timestamp = tag.Block.Timestamp;
                    }

                    if (tag.EuRange.Length >= 4 && node.InstrumentRange != null)
                    {
                        var range = new Range(tag.EuRange[2], tag.EuRange[3]);
                        node.InstrumentRange.Value     = range;
                        node.InstrumentRange.Timestamp = tag.Block.Timestamp;
                    }
                }

                if (!string.IsNullOrEmpty(tag.EngineeringUnits) && node.EngineeringUnits != null)
                {
                    var info = new EUInformation {
                        DisplayName  = tag.EngineeringUnits,
                        NamespaceUri = Namespaces.DataAccess
                    };
                    node.EngineeringUnits.Value     = info;
                    node.EngineeringUnits.Timestamp = tag.Block.Timestamp;
                }

                break;
            }

            case UnderlyingSystemTagType.Digital: {
                var node = variable as TwoStateDiscreteState;

                if (tag.Labels != null && node.TrueState != null && node.FalseState != null)
                {
                    if (tag.Labels.Length >= 2)
                    {
                        node.TrueState.Value      = new LocalizedText(tag.Labels[0]);
                        node.TrueState.Timestamp  = tag.Block.Timestamp;
                        node.FalseState.Value     = new LocalizedText(tag.Labels[1]);
                        node.FalseState.Timestamp = tag.Block.Timestamp;
                    }
                }

                break;
            }

            case UnderlyingSystemTagType.Enumerated: {
                var node = variable as MultiStateDiscreteState;

                if (tag.Labels != null)
                {
                    var strings = new LocalizedText[tag.Labels.Length];

                    for (var ii = 0; ii < tag.Labels.Length; ii++)
                    {
                        strings[ii] = new LocalizedText(tag.Labels[ii]);
                    }

                    node.EnumStrings.Value     = strings;
                    node.EnumStrings.Timestamp = tag.Block.Timestamp;
                }

                break;
            }
            }
        }
Пример #4
0
        /// <summary>
        /// Creates a variable from a tag.
        /// </summary>
        /// <param name="context">The context.</param>
        /// <param name="tag">The tag.</param>
        /// <returns>The variable that represents the tag.</returns>
        private BaseVariableState CreateVariable(ISystemContext context, UnderlyingSystemTag tag)
        {
            // create the variable type based on the tag type.
            BaseDataVariableState variable = null;

            switch (tag.TagType)
            {
            case UnderlyingSystemTagType.Analog: {
                var node = new AnalogItemState(this);

                if (tag.EngineeringUnits != null)
                {
                    node.EngineeringUnits = new PropertyState <EUInformation>(node);
                }

                if (tag.EuRange.Length >= 4)
                {
                    node.InstrumentRange = new PropertyState <Range>(node);
                }

                variable = node;
                break;
            }

            case UnderlyingSystemTagType.Digital: {
                var node = new TwoStateDiscreteState(this);
                variable = node;
                break;
            }

            case UnderlyingSystemTagType.Enumerated: {
                var node = new MultiStateDiscreteState(this);

                if (tag.Labels != null)
                {
                    node.EnumStrings = new PropertyState <LocalizedText[]>(node);
                }

                variable = node;
                break;
            }

            default: {
                var node = new DataItemState(this);
                variable = node;
                break;
            }
            }

            // set the symbolic name and reference types.
            variable.SymbolicName    = tag.Name;
            variable.ReferenceTypeId = ReferenceTypeIds.HasComponent;

            // initialize the variable from the type model.
            variable.Create(
                context,
                null,
                new QualifiedName(tag.Name, BrowseName.NamespaceIndex),
                null,
                true);

            // update the variable values.
            UpdateVariable(context, tag, variable);

            return(variable);
        }
        /// <summary>
        /// Creates the tag.
        /// </summary>
        /// <param name="tagName">Name of the tag.</param>
        /// <param name="dataType">Type of the data.</param>
        /// <param name="tagType">Type of the tag.</param>
        /// <param name="engineeringUnits">The engineering units.</param>
        /// <param name="writeable">if set to <c>true</c> the tag is writeable.</param>
        public void CreateTag(
            string tagName,
            UnderlyingSystemDataType dataType,
            UnderlyingSystemTagType tagType,
            string engineeringUnits,
            bool writeable)
        {
            // create tag.
            var tag = new UnderlyingSystemTag {
                Block            = this,
                Name             = tagName,
                Description      = null,
                EngineeringUnits = engineeringUnits,
                DataType         = dataType,
                TagType          = tagType,
                IsWriteable      = writeable,
                Labels           = null,
                EuRange          = null
            };

            switch (tagType)
            {
            case UnderlyingSystemTagType.Analog: {
                tag.Description = "An analog value.";
                tag.TagType     = UnderlyingSystemTagType.Analog;
                tag.EuRange     = new double[] { 100, 0 };
                break;
            }

            case UnderlyingSystemTagType.Digital: {
                tag.Description = "A digital value.";
                tag.TagType     = UnderlyingSystemTagType.Digital;
                tag.Labels      = new string[] { "Online", "Offline" };
                break;
            }

            case UnderlyingSystemTagType.Enumerated: {
                tag.Description = "An enumerated value.";
                tag.TagType     = UnderlyingSystemTagType.Enumerated;
                tag.Labels      = new string[] { "Red", "Yellow", "Green" };
                break;
            }

            default: {
                tag.Description = "A generic value.";
                break;
            }
            }

            // set an initial value.
            switch (tag.DataType)
            {
            case UnderlyingSystemDataType.Integer1: { tag.Value = (sbyte)0; break; }

            case UnderlyingSystemDataType.Integer2: { tag.Value = (short)0; break; }

            case UnderlyingSystemDataType.Integer4: { tag.Value = 0; break; }

            case UnderlyingSystemDataType.Real4: { tag.Value = (float)0; break; }

            case UnderlyingSystemDataType.String: { tag.Value = string.Empty; break; }
            }

            lock (_tags) {
                _tags.Add(tag);
                Timestamp = DateTime.UtcNow;
            }
        }
        /// <summary>
        /// Updates the value of an tag.
        /// </summary>
        private bool UpdateTagValue(
            UnderlyingSystemTag tag,
            Opc.Ua.Test.TestDataGenerator generator)
        {
            // don't update writeable tags.
            if (tag.IsWriteable)
            {
                return(false);
            }

            // check if a range applies to the value.
            var high = 0;
            var low  = 0;

            switch (tag.TagType)
            {
            case UnderlyingSystemTagType.Analog: {
                if (tag.EuRange?.Length >= 2)
                {
                    high = (int)tag.EuRange[0];
                    low  = (int)tag.EuRange[1];
                }

                break;
            }

            case UnderlyingSystemTagType.Digital: {
                high = 1;
                low  = 0;
                break;
            }

            case UnderlyingSystemTagType.Enumerated: {
                if (tag.Labels?.Length > 0)
                {
                    high = tag.Labels.Length - 1;
                    low  = 0;
                }

                break;
            }
            }

            // select a value in the range.
            var value = -1;

            if (high > low)
            {
                value = (generator.GetRandomUInt16() % (high - low + 1)) + low;
            }

            // cast value to correct type or generate a random value.
            switch (tag.DataType)
            {
            case UnderlyingSystemDataType.Integer1: {
                if (value == -1)
                {
                    tag.Value = generator.GetRandomSByte();
                }
                else
                {
                    tag.Value = (sbyte)value;
                }

                break;
            }

            case UnderlyingSystemDataType.Integer2: {
                if (value == -1)
                {
                    tag.Value = generator.GetRandomInt16();
                }
                else
                {
                    tag.Value = (short)value;
                }

                break;
            }

            case UnderlyingSystemDataType.Integer4: {
                if (value == -1)
                {
                    tag.Value = generator.GetRandomInt32();
                }
                else
                {
                    tag.Value = value;
                }

                break;
            }

            case UnderlyingSystemDataType.Real4: {
                if (value == -1)
                {
                    tag.Value = generator.GetRandomFloat();
                }
                else
                {
                    tag.Value = (float)value;
                }

                break;
            }

            case UnderlyingSystemDataType.String: {
                tag.Value = generator.GetRandomString();
                break;
            }
            }

            tag.Timestamp = DateTime.UtcNow;
            return(true);
        }
        /// <summary>
        /// Writes the tag value.
        /// </summary>
        /// <param name="tagName">Name of the tag.</param>
        /// <param name="value">The value.</param>
        /// <returns>The status code for the operation.</returns>
        public uint WriteTagValue(string tagName, object value)
        {
            UnderlyingSystemTag     tag           = null;
            TagsChangedEventHandler onTagsChanged = null;

            lock (_tags) {
                onTagsChanged = _onTagsChanged;

                // find the tag.
                tag = FindTag(tagName);

                if (tag == null)
                {
                    return(StatusCodes.BadNodeIdUnknown);
                }

                // cast value to correct type.
                try {
                    switch (tag.DataType)
                    {
                    case UnderlyingSystemDataType.Integer1: {
                        tag.Value = (sbyte)value;
                        break;
                    }

                    case UnderlyingSystemDataType.Integer2: {
                        tag.Value = (short)value;
                        break;
                    }

                    case UnderlyingSystemDataType.Integer4: {
                        tag.Value = (int)value;
                        break;
                    }

                    case UnderlyingSystemDataType.Real4: {
                        tag.Value = (float)value;
                        break;
                    }

                    case UnderlyingSystemDataType.String: {
                        tag.Value = (string)value;
                        break;
                    }
                    }
                }
                catch {
                    return(StatusCodes.BadTypeMismatch);
                }

                // updated the timestamp.
                tag.Timestamp = DateTime.UtcNow;
            }

            // raise notification.
            if (tag != null && onTagsChanged != null)
            {
                onTagsChanged(new UnderlyingSystemTag[] { tag });
            }

            return(StatusCodes.Good);
        }