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本文在Siemens S7-300 PLC的基础上实现PID功能块的自定义结构化设计。文中主要介绍PID功能块的总体结构设计思路、状态转移图设计及梯形图程序编制,最终形成具有固定且完整结构框架的功能块。合理的程序结构与良好的编程模式,可以降低程序开发的难度,增加程序的可读性和系统的可维护性。
This text realizes the self-defining structured design of PID function block on the basis of Siemens S7-300 PLC. This paper mainly introduces the overall structure design of PID function block, state transition diagram design and ladder diagram programming, and finally forms a function block with fixed and complete structural framework. Reasonable program structure and a good programming model, you can reduce the difficulty of program development, increase program readability and system maintainability.