Rockwell Automation T6200 Compressor Anti-Surge and Capacity Controller - Manual (Page 132)

Configuration
8-12
Press this button before inserting a new line.
o The configurator enables you to terminate a connection line with a boolean negation represented by a small circle.
To set or remove the boolean negation, select the line and press the SPACE bar.
Connection lines must always be drawn in the direction of the data flow: from an output pin to an input
pin. The FBD editor automatically selects the best routing for the new line. Connection lines indicate a
data flow between the following possible objects:
Connection lines can also be entered when in the seclection mode by bringing the cursor close to the
output of a block/variable. When the cursor is close enough, the arrow cursor of the selection mode
automatically changes to four inward pointing triangles. When it does so, the user can start entering a
connection line.
To select an existing line on a FBD, simply hold down the CTRL key and click on the line. This will turn
the solid line into a dotted line and select it for other operations.
Block: Refer to the help on the block for the description of its input and output pins, and the expected data types for the
coherency of the diagram.
Variable: Variable can be connected on their right side (to initiate a flow) or on their left side for forcing the variable,
if it is not “read only”. The flow must fit the data type of the variable.
Jump: a jump must be connected on its left side to a Boolean data flow.
Selecting FBD variables and instances
Press this button or press ESCAPE before any selection.
To select the name of the declared variable to be attached to a graphic symbol, you must be in
“Selection” mode. Simply double click on the tag name gray area. The following types of object must be
linked to valid symbols:
Block: If it is a function block, you must specify the name of a valid declared instance of the corresponding type.
Variable: Must be attached to a declared variable. Alternatively, a variable box may contain the text of a valid constant
expression.
Label: Must have a name. The name must be unique within the diagram.
Jump: must have the same name as its destination label.
Symbols of variables and instances are selected using the STRATON variable list that can be used as the
STRATON variable editor. You can simply enter a symbol or constant expression in the edit box and
press OK. You also can select a name in the list of declared object, or declare a new variable by pressing
the “Create” button.
Viewing FBD diagrams
The diagram is entered in a logical grid. All objects are snapped to the grid. You can use the commands
of the “View” menu for displaying of hiding the points of the grid. The (x,y) coordinates of the mouse
cursor are displayed in the status bar. This helps you locating errors detected by the compiler, or aligning
objects in the diagram.
At any moment you can use the commands of the “View” menu for zooming in or out the edited
diagram. You also can press the [+] and [-] keys of the numerical keypad for zooming the diagram
in or out.