7.4 Programming in Function Block Diagram (FBD)
This section explains how to create programs (FBD programs) in Function Block Diagram
compliant with IEC 61131-3, the international standard for PLC programming languages.
● To create FBD programs, POU objects for FBD programs are required. Set the object setup
language to Function Block Diagram (FBD).
● The editor for FBD programs is a window like the one shown below. It consists of the
declaration section used to declare variables and the implementation section used to enter
program data. Elements can be arranged in the implementation section by selecting them
from Toolbox and then dragging and dropping them in the implementation section.
7.4.1 Entering Function Blocks
This section explains the procedure for entering function blocks, using an FBD program
consisting of the following variables and function block TON as an example.
WUME-GM1RTXOP-01
7.4 Programming in Function Block Diagram (FBD)
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