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Communication between C# upper computer and Schneider PLC Introduction to ModbusTCP communication protocol Schneider PLC communication is a Modbus protocol based on Ethernet TCP/IP, in which TCP is what we call ModbusTCP protocol. Modbus protocol is an application layer message transmission protocol, including ASCII, RTU, TCP and other messag ...

Software preparation: FreeModbus source code: Source code address of FreeModbus master and slave Development tools: Keilv5 and CubeMX Hardware platform: STM32F407VET6 (with RS485 interface) 1. Generate Keil project with CubeMX: Skip other basic parts. Here are some points that need attention. Configure the system debugging pin and select the ...

  catalogue 1, Content discussed in this paper 2, Tools and source code 3, Modbus overview 4, Modbus RTU communication protocol 5, Complete Modbus I / O code 6, Complete Modbus logic function 7, Testing and verification 1, Content discussed in this paper This paper briefly introduces the Modbus communication protocol, realizes t ...

1. Selection of overall architecture First of all, according to the requirements, I use the springboot+netty architecture, using a serial port to network port conversion module. Why use it like this? The Linux system is used during deployment. It is troublesome to install the driver under Linux, so the network port can save a lot of server con ...