RS485通信模式控制开关量输入及输出的设计及实现  

Design and Implementation of Switch Input and Output Controlled by RS485 Mode

作　　者：贾婉艳 冯凯 Jia Wanyan;Feng Kai(Henan Jinwei Communication Technology Co.,Ltd.,Zhengzhou 450001,China;Luohe Institute of Technology,Henan University of Technology,Luohe,Henan 462000,China)

机构地区：[1]河南金威通信技术有限公司,河南郑州450001 [2]河南工业大学漯河工学院,河南漯河462000

出　　处：《漯河职业技术学院学报》2022年第1期29-33,共5页Journal of Luohe Vocational Technical College

基　　金：河南省高等教育教学改革研究与实践项目(2019SJGLX661);教育部创新行动发展计划《机电一体化技术》骨干专业建设项目;河南省教育厅创新行动发展计划《机电一体化技术专业教学资源库》建设项目。

摘　　要：工业应用中长线传输、多节点工作系统常用的RS485通信模式,通过读取开关量状态及控制继电器输出的方式实现远程控制、监测设备工作状态。硬件系统采用单片机控制,使用光电耦合器将外部开关量的输入输出与控制电路隔离,保证控制电路能够安全稳定工作;采用驱动器件,将信号放大,增加带载能力、驱动能力,以控制多路继电器输出;通过控制继电器的开关,达到远程控制设备工作状态的目的。The RS 485 communication mode, commonly used in long line transmission and multi-node working system in industrial application, realizes remote control and monitor the working state of the equipment by reading the state of switch value and controlling the output of relay. The hardware system makes use of the single-chip microcomputer for control and uses the optocoupler to isolate the input and output of external switch value from the control circuit to ensure that the control circuit can work safely and stably. And the driver is used to amplify the signal and increase the loading capacity and driving capacity. By controlling the switch of the relay, the working state of the equipment can be controlled remotely.

关 键 词：RS485通信 模式 控制 开关量输入 开关量输出 

分 类 号：TN915-34[电子电信—通信与信息系统]