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. The historian in the AVEVA application 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. The historian in the AVEVA application writes a record to history only if the value has changed since the last value. |
| 3 | Forced | The historian in the AVEVA application 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 Geo SCADA Expert. You cannot change it.
Geo SCADA Expert Metadata Field
WH_TagStorageType
Default Value
Geo SCADA Expert always fixes the value to Forced. This ensures that all of the data that Geo SCADA Expert exports to the historian is stored within the historian without any further filtering.
Type
Long.