Ladder diagram programming method: Ladder diagram is the most commonly used method for PLC programming. It is similar to a circuit diagram and completes PLC control tasks by connecting several logic control components. By drawing a ladder diagram, the logical relationship of the system can be clearly displayed, which facilitates program maintenance and modification.
Instruction list based programming method: This method mainly completes PLC programming by writing an instruction list. Compared with ladder diagram method, this method is more flexible and can cope with some special control tasks. Writing an instruction list requires a clear understanding of the instruction code and parameter information.
Based on structured text programming method: This method is similar to high-level programming languages, completing PLC control tasks by writing structured text code. This method is suitable for handling control tasks with complex logic, but requires programmers to have high programming skills. In addition, some PLC manufacturers have also launched integrated development environments based on structured text programming, making programming more convenient and efficient.
