PLC Programming

The Graphic Editors...
5.4.4 The Continuous Function Chart Editor (CFC)...
It looks like a block which has been produced using the continuous function chart editor (CFC):
No snap grid is used for the continuous function chart editor so the elements can be placed anywhere.
Elements of the sequential processing list include boxes, input, output, jump, label, return and
comments. The inputs and outputs of these elements can be connected by dragging a connection with
the mouse. The connecting line will be drawn automatically. The shortest possible connection line is
drawn taking into account existing connections. The connecting lines are automatically adjusted when
the elements are moved. If the case arises where a connecting line cannot be drawn simply because
of lack of space, a red line will be shown between the input and the associated output instead. This
line will be converted into a connecting line just as soon as space is available.
One advantage of the continuous function chart as opposed to the usual function block diagram editor
FBD is the fact that feedback paths can be inserted directly.
The most important commands can be found in the context menu
Cursor positions in the CFC
Each text is a possible cursor position. The selected text is shaded in blue and can be modified.
In all other cases the current cursor position is shown by a rectangle made up of points. The following
is a list of all possible cursor positions with examples:
1. Trunks of the elements box, input, output, jump, label, return and comments.
5-36 CoDeSys V2.3