Modbus TCP Server-Client communication through Ethernet switch

[Preeti]

Hi,

I'm using 2 STM32F4 MCUs for Modbus TCP Server/Client implementation based on LWIP. One MCU as a Client and other one as a Server. I have connect both MCUs through D-Link DES-1016D ethernet switch.

The problem is when I connect both MCUs directly (ie: without Ethernet switch) both Server-Client communicates properly. But if I connect them through switch, communication breaks from server side for some time and reconnects again.

If I ping the IP of Client it responds continuously. But when I ping the IP of Server, it responds for sometime and hit Request timeout for sometime.Server IP Ping test

Because some other TCP connections also are in my setup so I need to connect both the MCUs through switch only. Does anyone already succeed implementing such behavior?

 

Thanks in advance.

 

[Christian N]

Hello Preeti,

Thank you for contacting STMicroelectronics. Your inquiry is being escalated for specialized support.

Kind Regards,

Christian

ST Support