Ladder diagram matrix compiling and interpreting method based on PLC

Abstract

The present invention discloses a ladder diagram matrix compiling and interpreting method based on a PLC. According to the method, the matrix operation of a ladder diagram is carried out directly without IL language conversion and interpretation. The method comprises a process compiling process and an interpreting process. According to the compiling process, since an IL language conversion process is omitted, only the simple scanning of the connection relationship of a matrix is needed, the ladder diagram compiling process is greatly simplified, fault points are reduced, and the compiling efficiency is improved. Since only the connection relation between elements in the matrix is processed in the compiling process, the complex AND OR and AND OR nesting logic are not processed, the logic operation process is simplified, the fault points are reduced, and the compiling efficiency is improved. In the interpreting process, the process of interpreting an IL language into a binary system index table is omitted, the scanning combination operation of the ladder diagram matrix is directly carried out, a lot of bottom layer CPU resources are saved, the program operating speed is improved, and the fault points are reduced.

Description

technical field [0001] The invention relates to the field of computer technology, in particular to a compiling and interpreting method based on PLC ladder diagram matrix. Background technique [0002] The traditional PLC ladder diagram compilation and interpretation method uses the instruction list language (IL) as the intermediate interface. The instruction list programming language is a mnemonic programming language similar to assembly language, and is composed of opcodes and operands like assembly language. [0003] Compilation process: It is to compile the ladder diagram language into IL language, generally using the matrix analysis method, and the matrix analysis method is generally divided into two steps to convert into IL language. The first step is to generate a first-level code based on a mathematical formula, and the first-level code represents the relationship between the various elements of the ladder diagram. The second step is to generate the secondary code ac...

AI Technical Summary

Problems solved by technology

[0005] Disadvantage 1: The compilation process is complicated and inefficient

Large project files take longer

And the compilation process is complicated and error-prone

[0006] Disadvantage 2: The interpretation process needs to translate the secondary code into binary code, and then perform interpretation and execution according to the instruction index table

The process of translating secondary codes into binary codes is complicated and needs to be interpreted according to the index table

Causes resource constraints, and due to the complicated translation process, it makes it difficult to implement the program and increases the number of failure points

Images