摘要
随着电子技术的发展,使用Modbus-RTU协议通讯的数字传感器日益增多,但是由于Modbus-RTU协议"一主多从"的特点,多台数据采集器无法同时采集一台传感器数据;除此之外,RJ45接口的网络设备也无法采集RS-485接口的传感器数据,给项目施工增加了难题。为解决该问题,提出了一种基于STM32的Modbus数据转换器,有1路RS232接口、4路RS485接口和1个以太网接口,能够支持Modbus-RTU协议和Modbus-TCP协议之间的转换,也能够支持多个主站同时采集一个从站的传感器数据。
With the development of electronic technology,there are more and more digital sensors using Modbus RTU protocol.However,due to the ″one master and multiple slaves″ feature of Modbus RTU protocol,multiple data collectors cannot collect data from one sensor at the same time.In addition,the network equipment of RJ45 interface can not collect the sensor data of RS-485 interface,which increases the difficulty for the project construction.To solve this problem,this paper proposes a Modbus data converter based on STM32,which has one RS232 interface,four RS485 interfaces and one Ethernet interface.It can support the conversion between Modbus RTU protocol and Modbus TCP protocol,and can also support multiple master stations to collect sensor data from a slave station at the same time.
出处
《工业控制计算机》
2021年第11期9-11,共3页
Industrial Control Computer
