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1. Go to Axxon PSIM's root folder and open the psim.dbi file with a text editor.

2. Add the objects to psim.dbi. For each object, you must supply its name (used for identification) in brackets and then declare its fields. Below is the field declaration syntax:
   <Field name>, <Type> [, <Size>] 

   Info
   title Note.
   The Size may be set for fields of the CHAR type only.

   The table below shows the fields mandatory for all objects in Axxon PSIM.

   Field	Description
   id	Unique object ID
   name	Object name
   parent_id	Parent object ID
   flags	Parameter for internal system use

   
   

   Note
   title Attention!
   The flags field may not be used by external applications.

   The following table describes the allowed data types.

   Data type	Description
   BIT	Used for creating a flag field that takes a logical value, Yes or No.
   CHAR	Used for fields that contain short character sequences.
   DATETIME	Used for fields that contain dates and times. The date format is YYYY-MM-DD and the time format is HH:MM:SS.XXX.
   DOUBLE	Used for fields that contain floating-point numbers.
   INTEGER	Used for fields that contain integer numbers.
   TEXT	Used for fields that contain text strings.

   
   Beside the mandatory fields, the objects of the Axxon PSIM Demo module DEMO module contain the following fields:

   1. port – COM port address;
   2. address – device address.
   Figure below shows sample object additions and field declarations in psim.dbi.
   
3. Save the changes to the psim.dbi file.
4. Go to Axxon PSIM's root folder and run the idb.exe utility.
   
5. In the Select data source list, select Basic data (1).
6. Click the Update database button (2).
   The system will start updating the database structure. The progress will be shown in the Protocol window of idb.exe.
   
7. Click OK to close idb.exe.

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