- Start the FBEditor.
- Create a new data type in the editor by:
- Clicking the
 New...
=>  Data Type => XXXX menu item,
where XXXX is the kind of IEC 61131-3 derived data type that
you wish to create; possible values are Array, Direct,
Enumerated, Structured and Subrange; or
- Opening a file containing an existing data type of the
desired subtype; for instance, in the src\ita folder, the ANALOG_16_INPUT_DATAI,
FREQ, ANALOG_SIGNAL_TYPE, ANALOG_CHANNEL_CONFIGURATION and ANALOG_DATA
types corrrespond to the Array, Direct, Enumerated,
Structured and Subrange subtypes, respectively.
- Edit the data type's elements:
- Edit the data type's properties.
- Edit the data type elements in the XML area.
- You can edit elements of a structured data type
graphically in the same manner as input
variables of a function block type.
- From time to time as you are editing, use the File
Parse menu item or its equivalent Alt+S keychord to check the
syntax and update the graphical display. Syntax errors are displayed
in the status line under the menu bar and the offending line of code
is (usually) highlighted in the Text window.
- When your editing is complete, save your work with the
 Save As... button.
 It is a good idea to save your
work from time to time while editing, too!
- Generate and compile a Java® source file with the Save As... button.
- Since data types are not event-triggered elements like
function blocks, they cannot be tested directly using the Run=>Launch
menu item. However, they can be tested by launching
appropriate HMI Elements.
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