Programming language compiling method of PLC (Programmable Logic Controller)

Abstract

The invention relates to the field of industrial control and particularly relates to a programming language compiling method of a PLC (Programmable Logic Controller). The programming language compiling method comprises the following steps: converting an instruction list, analyzing an instruction, generating an intermediate code and generating an object code. According to the method, a trapezoid language program is converted into an instruction list source program by utilizing an instruction list language as a medium according to the one-to-one correspondence relation between the trapezoid language and the instruction list language, and then an instruction list is further processed, compiled and translated into the object code, so that the language logic relation is clear, the writing format is simple, the code utilization rate is high and the compiling effect is good. The programming language compiling method is conductive to providing a soft PLC control scheme applicable to multiple hardware platforms and developing a development system applicable to multiple operating system hardware platforms. When using hardware platforms of different manufacturers as soft PLC operating systems, a user can use the development tool without relearning programming of a new hardware platform, so that a lot of time spent in relearning programming is omitted, and the method has great practical significance in PLC development.

Description

technical field [0001] The invention relates to the field of industrial control, in particular to a method for compiling a PLC programming language. Background technique [0002] For a long time, computer control and traditional PLC control have been the two main control methods in the field of industrial control. Since its inception in 1969, PLC has been rapidly promoted in the field of industrial automation with its advantages of strong functions, high reliability, convenient use and small size, and has become a very competitive control tool in the field of industrial automation. With the rapid development and wide application of computer technology, people gradually realize the various drawbacks of hardware PLC. First of all, due to the large number of manufacturers, various models are incompatible with each other, there is no unified standard, and the types, numbers, programming languages, etc. of programming components are different; It is difficult for users to freel...

AI Technical Summary

Problems solved by technology

First of all, due to the large number of manufacturers, various models are incompatible with each other, there is no uniform standard, and the types, numbers, and programming languages ​​​​of programming components are different; secondly, the function realization of the product depends on the hardware, and the data structure is relatively closed. It is difficult for users to freely change or add PLC functions; third, the programming method of current PLC products requires users to have a considerable understanding of the hardware structure of PLC, the electrical principle of PLC, and programming instructions, which is not conducive to the development of PLC. Further promotion and use; Fourth, when the PLC breaks down, it is necessary to use special tools to detect the hardware by professionals, and then repair it, and the maintainability is poor; at the same time, its expensive price also seriously restricts its development