Introduction to FBD Editor

Overview

The FBD editor is a feature of the TeSys Tera DTM Library. Use the FBD Editor to view an existing FBD program file or to create an FBD program file using FBD language, rather than an instruction-based text programming language.

Creating an FBD Program

To open the FBD editor, select Device > FB Diagram > New FB Diagram or select the FB Diagram tab. The FBD editor appears in the main window.

Saving an FBD Program

Before compiling the FBD program, you must save it. To save the program you created or edited, select Device > FB Diagram > Save FB Diagram as.

FBD Editor User Interface

The FBD editor is available even when the TeSys Tera DTM Library is in connected mode. However, many of the menu items are enabled only when an FBD program is open in the FBD editor.

The below window shows FBD program open in the FBD editor:

Workspace

FBD programs are edited and created in the workspace.

The workspace is made up of two elements:

• Blocks

• Wires to link the blocks

Running FBD Programs

FBD programs are run line by line, from the left to the right and from top to bottom. In the example below, the instructions are carried out or performed from instruction 1 to instruction 5 and from instruction 6 to instruction 9, in the order indicated by numbers.