Rockwell Automation T6200 Compressor Anti-Surge and Capacity Controller - Manual (Page 131)

Configuration
8-11
FBD variables
All variable symbols and constant expressions are entered in FBD diagrams using small boxes.
Press the following button in the FBD toolbar for inserting a variable tag:
Insert variable: In this mode, the mouse is used for inserting variable tags. Click in the diagram and drag the new
variable to the desired position.
Double click on a variable tag to open the variable selection box and either select the symbol of
the desired variable or enter a constant expression.
Variables tags must then be linked to other objects such as block inputs and outputs using
connection lines.
You can resize a variable box vertically in order to display together with the variable name its tag
(short comment text), its description text. The variable name is always displayed at the bottom of
the rectangle:
tag
description
% location
name
FBD comments
Comment text areas can be entered anywhere in a FBD diagram. Press the following
button in the FBD toolbar for inserting a new comment area:
Insert comment text: In this mode, the mouse is used for inserting comment text areas in the diagram. Comment texts
can be entered anywhere. Click in the diagram and drag the text block to the wished position.
Double click on the comment area for entering or changing the attached text. When selected,
comment texts can be resized
FBD corners
Corners are used to force the routing of connection lines, as the FBD editor imposes a default
routing only between two pins or user defined corners. All variable symbols and constant
expressions are entered in FBD diagrams using small boxes. Press the following button in the
FBD toolbar for inserting a corner on a line:
Insert corner: In this mode, the mouse is used for inserting a user defined corner on a line.
You can drag a new line from an output pin to an empty space. In that case the editor
automatically finished the line with a user defined corner so that you can continue drawing the
connection to the wished pin and force the routing while you are drawing the line.
Corners can then be selected and moved to change the routing of existing lines.
FBD network breaks
Network breaks can be entered anywhere in a FBD diagram. Breaks have no meaning for the
execution of the program. They just help the understanding of big diagrams, by splitting them in a
list of networks. Press the following button in the FBD toolbar for inserting a new break:
Insert network break: In this mode, the mouse is used for inserting a horizontal line that acts as a break in the
diagram.
The break line is drawn on the whole diagram width. No other object can overlap a network break.
Break lines can then be selected and moved vertically to another location.
Drawing FBD connection lines