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Expanding the configuration data storage in the config-file

17.06.2020 20:00 Age: 105 days
Category: NewsDevelopment

By: Roman Savochenko


The interstation copying of the OpenSCADA configuration.

The module BD.DBGate.

The OpenSCADA configuration data storage in the configuration file by the functions TBDS::dataSeek(), TBDS::dataGet() and TBDS::dataSet(), expanded for work with the configuration XML-context, some common improved and fixed.

The configuration XML-context of the configuration functions applied for interstation copying of the main OpenSCADA configurators and in a new module BD.DBGate.

The interstation copying is the fastest way of transmitting-syncing OpenSCADA configuration from one local or remote station to other remote or local station by using the standard copying operations of the main OpenSCADA configurators Opens external link in new windowQTCfg and Opens external link in new windowWebCfgD. This function you can also use in the user procedures of OpenSCADA by the Opens external link in new windowUser API function cntrReq(), since this is just an expanding of the common service function "save" and "load" of the Opens external link in new windowOpenSCADA control interface.

The new module Opens external link in new windowBD.DBGate is a module of the Opens external link in new windowsubsystem "Databases" of locating-reflection databases of the remote OpenSCADA stations to local ones. In its work, the module uses the Opens external link in new windowOpenSCADA self protocol and service functions of the subsystem "Databases". This module can be useful:

  • in multiple-network accessing to the remote station DB, built on the local ones' basis like to Opens external link in new windowSQLite, such transforming their to the network ones;
  • in proxy-access to the remote station DB, built on the network DBMS basis, through the OpenSCADA control interface, what can be also secured, using Opens external link in new windowSSL;
  • in spreading between network stations the complex user area functions with DAQ and UI parts linked on DB, like to Opens external link in new windowPrescriptions.

Other improvements and fixes of the configuration data storage in the config-file means:

  • preventing from getting the previous value at loading from the config-file, by setting the default value;
  • appending for changing-saving the defined entries in the config-file instead complete saving all their in the default DB;
  • detection and correction of data losses with concurrence access to the Opens external link in new windowSQLite database, when a minor error of the not started transaction "cannot commit - no transaction is active (1)" is generated, which, however, interrupts the data recording.


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