Programming Languages For Pous - Mitsubishi Electric MELSEC Q Series Programming Manual

Programming languages for POUs

Two types of programming language are available for programs of POU.
The following explains the features of each programming language.
ST: Structured text
Control syntax such as selection branch by conditional syntax or repetitions by iterative syntax can be described in the
structured text language, as in the high-level language such as C language. Clear and simple programs can be written by
using these syntax.
Structured ladder/FBD: (ladder diagram)
The structured ladder or FBD is a graphical language developed based on the relay ladder programming technique. They are
commonly used for the sequence programming because they can be understood intuitively.
• Structured ladder
• FBD
4 PROGRAM CONFIGURATION
4.2 POUs
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