Function Block Diagram (FBD) Editor

The FBDClosed"Function block diagram" A function block diagram describes a function between input variables and output variables. A function is described as a set of elementary blocks Editor is a powerful graphical tool that enables you to enter and manages Function BlockClosedA function block groups an algorithm and a set of private data. It has inputs and outputs. Diagrams according to the IECClosed"International Electrotechnical Commission" IEC is a not-for-profit, non-governmental international standards organization that prepares and publishes International Standards for all electrical, electronic and related technologies 61131-3 standard. The editor supports advanced graphic features such as drag-and-drop, object resizing and connection line routing features, so that you can rapidly and freely arrange the elements of your diagram. It also enables you to insert in a FBD diagram graphic elements of the FFLD (Ladder Diagram) language such as contacts and coils.

FBD diagram components Related sections
Function blocks
Variable tags
Comment texts
Corners
Network breaks
Labels
Jumps
Use of ST instructions
Using the FBD toolbar
Selecting function blocks
Drawing connection lines
Selecting and entering variables and FB instances
Viewing the diagram
Moving or copying parts of the diagram
Inserting an object on a line
Resizing objects
Bookmarks
FFLD components:  
Contacts
Coils
"OR" vertical rail
Power rails
 

  • When a contact or a coil is selected, you can press the Spacebar to change its type (e.g. normal, negated, pulse)

Boolean connections can be negative at the entry of a block.

Execution order can be displayed.

Concept Link IconSee Also