/// <summary>
/// Sets the opc value.
/// </summary>
/// <param name="reference">The monitored item reference.</param>
/// <param name="opcValue">The OPC value structure.</param>
private void SetOpcValue(MonitoredItemReference reference, DAVtq opcValue)
{
switch (reference.FieldType)
{
case FieldTypes.Quality:
this.RuntimeMeasurements[reference.Index].Quality = this.FormatOpcVtq(reference.MappingType, opcValue);
break;
case FieldTypes.Timestamp:
this.RuntimeMeasurements[reference.Index].Timestamp = this.FormatOpcVtq(reference.MappingType, opcValue);
break;
case FieldTypes.Unit:
this.RuntimeMeasurements[reference.Index].Unit = this.FormatOpcVtq(reference.MappingType, opcValue);
break;
case FieldTypes.Value:
this.RuntimeMeasurements[reference.Index].Value = this.FormatOpcVtq(reference.MappingType, opcValue);
break;
}
}
/// <summary>
/// Adds a new item to the collection.
/// </summary>
/// <param name="reference">The reference to the corresponding monitored item from the calling client.</param>
/// <param name="serverClass">The server class.</param>
/// <param name="itemId">The OPC item id.</param>
/// <remarks>
/// This method adds a new item or only the reference when the item exists already.
/// </remarks>
public void Add(MonitoredItemReference reference, string serverClass, string itemId)
{
var descriptor = new Descriptor(serverClass, itemId);
References references;
if (!this.ItemDescriptors.TryGetValue(descriptor, out references))
{
references = new References()
{
reference
};
this.ItemDescriptors.Add(descriptor, references);
this.ItemGroupArgumentList.Add(
new DAItemGroupArguments(
new ServerDescriptor(serverClass),
new DAItemDescriptor(itemId),
new DAGroupParameters(this.OpcRefreshRate),
references));
}
else
{
references.Add(reference);
}
}
