Description
The type of storage for the tag. This property applies to all tag types. The possible values for the property are as follows:
| Value | Name | Description |
|---|---|---|
| 1 | Cyclic | Data is stored in Cyclic mode. Cyclic storage is the storage of analog data based on a time interval. Wonderware Historian writes a record to history at the specified interval, only if a data change occurred during this time interval. |
| 2 | Delta | Data is stored in Delta mode. Delta storage is the storage of data based on a change in a value. Wonderware Historian writes a record to history only if the value has changed since the last value. |
| 3 | Forced | Wonderware Historian stores all data values received from the data source. Forced storage is the storage of each value as it arrives from the plant floor or from a client application, with no filtering applied (that is, Delta or Cyclic storage mode is not used). |
| 0 | Not Stored | Data is not stored. |
The value of the property is fixed by ClearSCADA. You cannot change it.
ClearSCADA Metadata Field
WH_TagStorageType
Default Value
ClearSCADA always fixes the value to Forced. This ensures that all the data that ClearSCADA exports to Wonderware Historian is stored within Wonderware Historian without any further filtering.
Type
Long.