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!