Programmable controller with stored tokenized source code.

摘要

A programmable controller executes a compiled version of a ladder diagram type control program to control the functions of a piece of equipment. The compiled program includes not only the machine language instructions but also a tokenized version of the source code which was used to generate various portions of the machine language instructions that cannot be easily used to regenerate the source code and ladder diagram. This facilitates the editing of the program as the original ladder diagram may be recreated from a combination of the object code and a tokenized version of the source code.