How to Create a Function Block (FB) in GX Works3: Reusable PLC Code

How to Create a Function Block (FB) in GX Works3: Reusable PLC Code
Headline: Stop rewriting the same code! This full tutorial shows you exactly how to create, program, and use a Function Block (FB) in Mitsubishi GX Works3 for your MELSEC PLCs.

What You Will Learn in this Video:

1 - Introduction to Function Blocks (FB) and why they are essential.

2 - Setting up a new Function Block (FB) in the GX Works3 project.

3 - Defining FB Interface variables (Inputs, Outputs, and Internal/Temporary variables).

4 - Programming the Function Block code (Example: A simple Motor Control or Timer Block).

5 - Instancing the Function Block in your main program.

6 - Calling the FB and passing parameters (Inputs/Outputs).

7 - Testing and Monitoring the Function Block.

Function Blocks are the key to:

Code Reusability: Write a block once and use it thousands of times.

Code Organization: Keep your main program (Program POU) clean and easy to read.

Standardization: Ensure all your machines use the same, tested, and verified code.

🛠️ Software/Hardware Used:

Software: Mitsubishi Electric GX Works3

PLC Series: MELSEC iQ-R / FX5U (or specify your actual PLC)

🔔 Don't forget to like this video, subscribe for more PLC programming tutorials, and let me know in the comments what Function Block you plan to create next!

Видео How to Create a Function Block (FB) in GX Works3: Reusable PLC Code канала CK Automation