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Parameters for type: dBase III file (*.dbf) - configuration window

The data are saved to disk in the form of a dBase III file (*.dbf).
This type of saving is suitable first of all for a local alarm group (server), when the alarm group represents a place in the application where alarm items really arise and they are saved to disk for needs of viewing. The window serves for setting the parameters of backup of a filled data file (alarms). Always when the file is filled by the specified number of records or when the defined time-range elapsed, it is closed and a new file is created with the name consisting of the backups list file name, the time (when the file was created) and an extension. This process proceeds so long until the specified the number of files is created. If it is necessary to create next backup but the number of backups is already spent, then the oldest backup (file) is removed.
After the application is launched, a time sorted list of all data files is created in the memory based on the current data files with corresponding prefixes present in the specified folder. The sorting is done based on the time information contained in the file name (if the filename time identification fails then the first record is used, or the file modification time is used). Therefore it is acceptable to remove (backup) or add some data files from the folder while the application is not running.
In the case of a remote alarm group (see the "Remote group (client)" configurator), it sets the way of getting the data for the alarm history viewer by file sharing . The current alarm states is not transferred by this way. The alarm states have to be transferred somehow between groups and to set the states by script. The simplest way, in this case, is to use the data sharing of an alarm group by means of the "Remote connection via the Web" configurator where both the alarm state viewer (including the alarm acknowledgment) and the alarm history viewer are active.
Folders for filesPath to the folder with data files (dBase III files *.dbf). It is recommended to use the PROMOTIC path syntax - see PROMOTIC path to files and folders. For example #data:Alarm/.
Caution! For each alarm group (PmaAlarmGroup object) different folder should be used. If the backup files of multiple groups are stored in a single shared folder, then at least the prefixes of such files must differ. It means that the individual groups must differ either by the defined folder or file prefix (or both).
File name prefixThe prefix - first part of the filename, for example alarm_. The whole file name consists of this prefix followed by time string, displaying the time of backup creation, and extension. For examplealarm_2007-01-15_18-45-43.dbf.
Macro expression can be used for input (it is evaluated after the application is launched).
Backup creation is defined by records countIf checked, then the backup (creating new file) is performed on achievement of specified record number.
Backup creation is defined by time spanIf checked, then the backup (creating new file) is performed periodically with the defined period (Every year, month, week, day, hour, minute, second).
Time span
1 year
1 month
1 week
1 day
1 hour
1 minute
The total number of backups is limitedMaximum number of backup files. If this number of files is achieved, then the oldest file is replaced by the newest one.
Text data saved asSpecifies the text data coding for saving into the file. It concerns primarily diacritic characters (i.e. national dependent characters) saving method.
ANSI - dependent on Windows OS code page - The texts are saved using the national code page based on Windows OS setting. This method does not allow saving multilingual texts coded by different language code pages simultaneously (e.g. English and Russian).
UTF8 (Unicode) - independent on Windows OS code page - The texts are saved using the universal UTF8 Unicode coding. This method is independent on Windows OS codepage setting, and also on the application main language setting (see the "Main language of runtime" configurator).
This method allows saving multilingual texts coded by different code pages simultaneously (e.g. English and Russian).

Pm9.00.00: Created
PROMOTIC 9.0.28 SCADA system documentation MICROSYS, spol. s r.o.

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