s7-1200plc的modbustcp通信分析

Modbus-tcp Communication Analysis of s7-1200

Modbus TCP是标准的网络通信协议,通过CPU上PN接口进行TCP/IP通信,不需要额外的通信硬件模块,Modbus TCP使用开放式用户通信连接作为Modbus通信路径,所支持的混合客户机和服务器连接数最大为CPU所允许的最大开放式用户通信连接数8个,在工业工程中得到了较多的应用。该文以s7-1200与华数机器人HSR-JR6的通信为例,详细阐述了利用TIA Portal V13软件通信的方法。

Modbus TCP is a standardized network communication protocol,which achieves the communication of TCP/IP through the PN port on CPU and doesn’t need any extra communication hardware module. Modbus TCP adopts open communication connection for users which is regarded as the communication path for Modbus.The maximum number of mixed clients and server connections supported by it is 8,which is also the largest linking number of open communication for users allowed by CPU.Moreover, it has relatively wide application in industrial engineering. Taking the example of the communication between s7-1200 and Huashu robot HSR-JR6,the paper elaborates the methods for modbus-tcp with the help of TIA Portal V13 software.