Mitsubishi PLCs are programmed using several languages depending on the application and complexity. The most common is Ladder Logic (LD), a graphical language that looks like traditional relay circuits. It’s easy to read and troubleshoot, making it ideal for most industrial automation tasks. For more structured programming, Mitsubishi PLCs support Structured Text (ST), which is a high-level, code-based language similar to Pascal. This is useful for complex calculations and logic.
For sequential operations, Sequential Function Chart (SFC) is used to design processes step by step. Function Block Diagram (FBD) is another graphical language where functions are represented as blocks connected to perform tasks. Some advanced Mitsubishi PLCs, especially the MELSEC iQ-R Series C Controller, also allow programming in C/C++ for high-speed processing and complex logic requirements. These programming languages give flexibility, allowing engineers to choose the best approach for their project while ensuring Mitsubishi PLCs operate reliably in industrial automation systems. Understanding these languages is essential for programming, debugging, and maintaining efficient automation workflows.