1. Chapter 10 Function Block Diagram
Course T314

2. Function Block Diagram
Overview
Objectives
After this chapter you should be able to:
Configure simple application code in FBD
Use I/O's in application code by connecting variables
Modify application parameters online
Organize code in different code blocks and pages
Reference Documentation
3BSE IndustrialIT 800xA – Control and I/O Application Programming – Introduction and Design
3BSE IndustrialIT 800xA – Control and I/O Basic Control Software – Introduction and Configuration
3BSE IndustrialIT 800xA – Control and I/O Extended Control Software – Binary and Analog Handling

3. Function Block Diagram
Function Block Diagram Editor
Online Handling
Find and Search Tool
Multiple Pages

4. FBD Editor
Overview
Structure Pane
FBD Pane

5. FBD Editor
Functions in FBD

6. FBD Editor
FBD Pane
Graphic symbols of function and function block (boxes)
Instance names of the function blocks
Comments attached to the function blocks and functions
Assignment of parameters in form of connection lines between the graphic symbols
Comment of the page and footer

7. FBD Editor
Toolbar Buttons

8. Insert a Function / Function Block
FBD Editor
Insert a Function / Function Block
Use the toolbar button
Choose “Insert > Function/ Function block” from the POU menu
Right click in the code pane and choose “Insert Function / Function block”

9. EN Input Parameter FBD Editor
The EN property for functions and function blocks in FBD makes it possible to write code that corresponds to “IF statements” in the Structured Text language.
When the EN input is true, the function or function block will be executed, otherwise not.
When the EN input becomes false, all outputs will keep their values from the previous cycle of execution.

10. Each Parameter Separately
FBD Editor
Making Connections
An output parameter can be assigned to any number of input parameters but never to another output parameter.
Each Parameter Separately
All Parameters

11. Inverting Connections
FBD Editor
Inverting Connections

12. Structure Pane FBD Editor
Item shows the type name of the function block or function with their properties in parentheses
Comment shows the comment attached to the function block or function
Page Comment shows the comment on the top of the corresponding Function Block Diagram page
Page No is given at the first function block or function of every page of the Function Block Diagram
Instance shows the name of function blocks

13. Function Block Diagram
Function Block Diagram Editor
Online Handling
Find and Search Tool
Multiple Pages

14. Changing Values Online
Online Handling
Changing Values Online

15. Function Block Diagram
Function Block Diagram Editor
Online Handling
Find and Search Tool
Multiple Pages

16. Find and Search Tool
Tools Overview

17. Search for Variables in Projects
Find and Search Tool
Search for Variables in Projects

18. Navigating to References
Find and Search Tool
Navigating to References

19. Function Block Diagram
Function Block Diagram Editor
Online Handling
Find and Search Tool
Multiple Pages

20. Multiple Pages
Page Setup
For current Code block
Change default layout

21. Insert / Delete Page Break
Multiple Pages
Insert / Delete Page Break
This action can only be done in the Structure Pane.

22. Multiple Pages
Page References