| 逻辑代数在PLC控制系统中的应用 |
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| 引用本文： | 何继爱.逻辑代数在PLC控制系统中的应用[J].甘肃科学学报,2009,21(1):97-100. |
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| 作者姓名： | 何继爱 |
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| 作者单位： | 兰州理工大学,计算机与通信学院,甘肃,兰州,730050 |
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| 基金项目： | 兰州理工大学基础科研项目 |
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| 摘 要： | 介绍了1种用双PLC备份实现某化工厂工艺电器控制系统硬件电路设计方法．根据继电器常用的工作方式，探讨了继电器的逻辑关系表达式，将逻辑代数这一数学工具引用到继电器控制和PLC梯形图设计中能够快捷、准确地实现控制系统原理图．对于复杂的二次原理图还可以采用分块设计然后再组合，大大地提高了工作效率，实践证明，该方法简单、快捷，并且具有灵活性．
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| 关 键 词： | 继电器 可编程控制器 控制 逻辑函数 原理图 |
The Application of Logic Algebra in PLC Control System |
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| HE Jiai.The Application of Logic Algebra in PLC Control System[J].Journal of Gansu Sciences,2009,21(1):97-100. |
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| Authors: | HE Jiai |
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| Institution: | HE Ji-ai (School of Computer Science and Communications, Lanzhou University of Science and Technology ,Lanzhou 730050, China ) |
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| Abstract: | The design of a hardware used in a control system is introduced. That can be used in a chemical plant with a double-PLC backup. According to the working mode of relay, the formula of its logical relation is explored;logical algebra is applied to the control of the relay and PLC ladder design. With this method, the schematics of the control system could be achieved quickly and accurately. Complex schematics could be blocked first and then assembled, thus greatly enhancing the work efficiency. |
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| Keywords: | electromagentic relay PLC control logic function principle diagram |
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