[Note: The following content is based on the simulation programming of Huichuan PLC (easy52x) using AutoShop. Other brands of PLCs may vary slightly. This article aims to help you quickly get started with STL and SFC programming.] Recommended Learning Sequence Ladder Diagram –> STL Step Ladder Diagram –> SFC Sequential Function Chart STL Step Ladder … Read more
The instruction system of Mitsubishi PLC is very rich, mainly divided intoFX Series (Small) and Q/L Series (Medium to Large). Most of their instructions are similar, but the Q/L series has more advanced instructions. The instruction system of Mitsubishi PLC is very rich, mainly divided intoFX Series (Small) and Q/L Series (Medium to Large). Most … Read more
After downloading the prepared program to the PLC, it begins to scan the user program, which is its core function. The entire scanning process is referred to as a scan cycle, as shown in the figure below. First, it detects the input signal X, then scans the program, such as the ladder diagram, and temporarily … Read more
Abstract: For sequential process control, the step control function (SFC) of Mitsubishi PLC is a more intuitive and powerful solution than traditional ladder diagrams. This article will introduce the core concepts of SFC, programming steps, and tips to avoid common mistakes in a straightforward manner, along with a practical case study demonstrating how it simplifies … Read more
Advanced Electrician: Three Programming Methods for Traffic Light PLC Control 1. Control Requirements First Method: SFC Parallel Second Method: SFC Single Process Third Method: Basic Instruction – Time Contact Comparison Instruction 2. Wiring Operations With persistent effort, the future is promising. Thank you for your recognition and support.