MS Excel database
The variable values are stored in a Microsoft Excel database.
Declaration in the TwinCAT Database Server Configurator
Microsoft Excel database | |
|---|---|
DBValueType | Select "Double" to limit logging to alphanumeric and Boolean data types. |
DBType | Select "MS Excel". PLC: eDBType_MSExcel. |
DBServer | Not required. |
DBProvider | "Microsoft.Jet.OLEDB.4.0" or "Microsoft.ACE.OLEDB.12.0" |
DBUrl | DBUrl contains the path to the Excel file. |
DBTable | DBTable contains the name of the table. |
 | Windows CE support Under Windows CE this database is not supported by the TwinCAT Database Server. |
| TwinCAT/BSD support This database is not supported by the TwinCAT Database Server on the TwinCAT/BSD platform. |
Data type mapping between DB and PLC
E_DBColumnTypes | MS Excel | PLC Control |
|---|---|---|
eDBColumn_BigInt | Number | LREAL |
eDBColumn_Integer | Number | LREAL |
eDBColumn_SmallInt | Number | LREAL |
eDBColumn_TinyInt | Number | LREAL |
eDBColumn_Bit | BOOLEAN | BOOL |
eDBColumn_Money | Currency | LREAL |
eDBColumn_Float | Number | LREAL |
eDBColumn_Real | Number | LREAL |
eDBColumn_DateTime | Date | DT |
eDBColumn_NText | Text | STRING(255) |
eDBColumn_NChar | Text | STRING(255) |
eDBColumn_NVarChar | Text | STRING(255) |
| Functions that are not supported Automatic ID generation is not supported by this database. If the standard table structure is used in Configure mode, the value of the ID is not set. |
| Non-supported data types Binary, VarBinary and Image are not supported with Excel databases. |
| Data type support WSTRING is not supported by this database. (See WString support) |
Notice | |
Data security In flash memory devices the number of write access operations is limited. The flash memory devices can fail, with a risk of data loss.
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