Examples of using Microsoft Access database

Access database in the PmaTrendGroup object

- When creating the object from Preconfiguration "PmaTrendGroup - Trend group" the "Storage type" configurator set to: Database Access backups (obsolete) or Database Access cyclic.

- In a newly created PmaTrendGroup object, on the "Storage" tab, the "Storage type" configurator set to: Database Access backups (obsolete) or Database Access cyclic.

The trend values can be defined on the "Data" tab or in the ExtTrend of the PmaData object.

If the database files do not exist, then these will be created on first applicagion launch, when calling the Run method (or the RunTime method) of the PmaTrendGroup object. Or automatically by checking the "Automatic saving after launch is enabled" configurator on the "Trend" tab.

Access database in the PmaDatabase object

- When creating the object from Preconfiguration "PmaDatabase - Database", select: Microsoft Access.

- In a newly created PmaDatabase object, on the "Database" tab, set the configurators: Technology, Database (file, folder, data source), Table (file), etc.

Access database in the PmaAdo object

- When creating the object from Preconfiguration "PmaAdo - ADO database", select the database type: Microsoft Access and in the "Database connection parameters" configurator select: Access - Provider Microsoft or Acces - Provider Jet.4.

- In the "Database connection parameters" configurator it is necessary to modify the file name and path to the database file.

The PmaAdo object is created, containing the DtiOper method on the "Methods" tab. This method represents the basic inteface for working with database tables and can be used, for example, by the Preconfiguration "Panel with editable table viewer of data source" viewer.

The interface uses the ADO technology that can be extended by additional functionality:

Example:

Creates new table data with columns nTime (time, primary key, mustn't be NULL), 'flags' (integer, mustn't be NULL) and 'value1' (real number, mustn't be NULL).

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pMe.DbExecute("", "CREATE TABLE data (nTime DATETIME PRIMARY KEY NOT NULL, flags SMALLINT NOT NULL, value1 FLOAT NOT NULL)", "");

See http://msdn.microsoft.com/en-us/library/ff841695.aspx.

History:

Pm8.02.00: Created

PROMOTIC 9.0.14 SCADA system documentation - MICROSYS, spol. s r.o.

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