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5 - Editors in CoDeSys
In the field Initial value, you may enter the initial value of the variable being declared. If this is an
array or a valid structure, you can open a special initialization dialog via the
input assistant dialog for other variable types.
button or open the
In the initialization dialog for an array you are presented a list of array elements; a mouse click on
the space following „:="opens an editing field for entering the initial value of an element.
In the initialization dialog for a structure, individual components are displayed in a tree structure.
The type and default initial value appear in brackets after the variable name; each is followed by
„:=". A mouse click on the field following „:=" opens an editing field in which you can enter the
desired initial value. If the component is an array, then the display of individual fields in the array
can be expanded by a mouse click on the plus sign before the array name and the fields can be
edited with initial values.
After leaving the initialization dialog with OK, the initialization of the array or the structure appears
in the field Initial value of the declaration dialog in IEC format.
Example: x:=5,field:=2,3,struct2:=(a:=2,b:=3)
In the Address field, you can bind the variable being declared to an IEC address (AT declaration).
If applicable, enter a Comment. The comment can be formatted with line breaks by using the key
combination <Ctrl> + <Enter>.
By pressing OK, the declaration dialog is closed and the variable is entered in the corresponding
declaration editor in accordance to the IEC syntax.
Note:
The dialog box for variable declaration you also get by the command 'Edit' 'Declare Variable'. If the
cursor is resting on a variable in Online mode, the Autodeclare window can be opened with
<Shift><F2> with the current variable-related settings displayed.
Line Numbers in the Declaration Editor
In offline mode, a simple click on a special line number will mark the entire text line.
In the online mode, a single click on a specific line number will open up or close the variable in this
line, in case a structural variable is involved.
Declarations as tables
If the Declarations as tables option is activated in the Project Options (category ‘Editor’) or – if you
already are working in the declaration editor – in the context menu, the declaration editor will look like
a table. As in a card-index box, you can select the register cards of the respective variable types and
edit the variables.
For each variable you are given the following entry fields.
Name:
Input the identifier of the variable.
Address:
If necessary, input the address of the variable (AT declaration)
Type:
Input the type of the variable. (Input the function block when instantiating a function
block)
Initial:
Enter a possible initialization of the variable (corresponding to the ":= " assignment
operator).
Comment: Enter a comment here.
Both of the display types of the declaration editor can be changed without causing any problems. In
online mode there are no different display types.
Insert new declaration:
In order to edit a new variable, select the 'Insert' 'New Declaration' command (see below).
Sorting the declarations:
CoDeSys V2.3
5-9