Is there away to connect the 2 PN interfaces of CPU 315 2pn / DP to the same switch ?

and how can i use it to make a ring topology network ?

and also, is that proper to make a modbus tcp/ip with ring topology ??

so , no way for that except to connect each to separate switch ?

eleceng.ahmed

Is there away to connect the 2 PN interfaces of CPU 315 2pn / DP to the same switch ?

and how can i use it to make a ring topology network ?

and also, is that proper to make a modbus tcp/ip with ring topology ??

 Are you trying to conect the two integrated ports of the PLC to the same switch to make a ring?

If yes, your will create a loop in the network and you know what will happend. If you want to make a ring i recommend to see this links

https://w3.siemens.com/mcms/topics/en/simatic/high-availability-systems/system-architecture/profinet/pages/default.aspx

https://w3app.siemens.com/mcms/infocenter/dokumentencenter/sc/ic/Documentsu20Brochures/BR_Redundante_Netzwerke_112012_en.pdf

For your last question, yes its possible.

Regards,

Online_Diagnostics