/// <summary>
        /// Queues the value to the monitored item.
        /// </summary>
        /// <param name="context">The context.</param>
        /// <param name="request">The request.</param>
        /// <param name="monitoredItem">The monitored item.</param>
        private void QueueValue(ServerSystemContext context, HdaReadRequest request, MonitoredItem monitoredItem)
        {
            NodeHandle handle = monitoredItem.ManagerHandle as NodeHandle;

            if (handle == null)
            {
                return;
            }

            ReadValueId nodeToRead = monitoredItem.GetReadValueId();
            DataValue value = new DataValue();
            ServiceResult error = null;

            HdaItemState item = handle.Node as HdaItemState;
            HdaAttributeState attribute = handle.Node as HdaAttributeState;

            if (item != null)
            {
                error = request.GetResult(context, item, nodeToRead, value, monitoredItem.DiagnosticsMasks);
            }
            else if (attribute != null)
            {
                error = request.GetResult(context, attribute, nodeToRead, value, monitoredItem.DiagnosticsMasks);
            }

            value.ServerTimestamp = DateTime.UtcNow;

            if (value.StatusCode != StatusCodes.BadNotFound)
            {
                monitoredItem.QueueValue(value, error);
            }
        }
        /// <summary>
        /// Queues the value to the monitored item.
        /// </summary>
        /// <param name="context">The context.</param>
        /// <param name="request">The request.</param>
        /// <param name="initialUpdate">if set to <c>true</c> [initial update].</param>
        public void QueueValues(ServerSystemContext context, HdaReadRequest request, bool initialUpdate)
        {
            for (int ii = 0; ii < m_monitoredItems.Count; ii++)
            {
                QueueValue(context, request, m_monitoredItems[ii]);
            }

            if (!initialUpdate)
            {
                IncrementSampleTime();
            }
        }