Demo |
The Demo3D.PLC.Comms.Tag namespace provides features to access PLCs which expose a tag-based protocol or API.
Classes| Class | Description | |
|---|---|---|
 | DirectTag | Access to a PLC tag. |
| DirectTagBatchNotify | An object for batching data changed notifications. |
| DirectTagRequest | Get access to a tag from a peer. |
| SequentialVectoredIO | Extensions to VectoredTagRequest lists for tags. |
| Tag | Access to a PLC tag. |
| TagAccess | Access to a PLC tag. May implement INotifyDataChanged and/or IDataChangedNotifier, depending on the service. |
| TagConversion | The tag and IO data types and their data conversion context providers. |
| TagRequest | Get access to a tag from a peer. |
| TagServiceExtensions | A class containing extension methods for ITagService. |
| TagValueChangedEventArgs | An event reporting the change in value of a tag. |
| TagValuesChangedEventArgs | An event reporting a change in data across a list of addresses. |
| VectoredTagAccess | A vectored tag access. |
| VectoredTagRequestT | A vectored tag request. |
| VectoredTagServiceExtensions | A class containing extension methods for IVectoredTagServiceT. |
Interfaces| Interface | Description | |
|---|---|---|
 | IDirectTagAccessService | PLC tag client service for clients that do not notify when tag data changes. |
| IDirectTagService | Protocol service for providing access to the tag data in the peer (bypassing any caches). |
| INotifyDirectTagAccessService | PLC tag client service for clients that do notify when tag data changes. |
| INotifyTagService | Protocol service for providing cached access to tags in a peer that will notify when a tag value changes. INotifyTagService.DataChanged callbacks will pass TagValuesChangedEventArgs. The TagAccess returned from INotifyTagService.GetTag implements INotifyDataChanged which will pass TagValueChangedEventArgs. |
| ITagService | Protocol service for providing access to the tag data in the peer. |
| IVectoredTagServiceT | Protocol service for providing vectored access to the tag data in the peer. |
Delegates| Delegate | Description | |
|---|---|---|
 | DirectTagBatchNotifyDelegate | Action to call when a tag changes. |