HMI communication

Hello,

I have a project with S7 400 H system and TP1500 HMI. Both are connected with ethernet connection. I have created a connection change by creating 3 connection, 2 for connection changeover and 1 for actual connection with HMI.

I have connected CPU0 to Port 1 of Profinet interface X1 and CPU1 to Port 2 of Profinet interface X1. Now I have problem with connection changeover. Is this configuration ok or I have to use a switch and connect both CPU to this switch and one prot of HMI to switch.

Hi, 

This example should guide you Connecting SIMATIC HMI Panels with SIMATIC S7-400H (WinCC V13 and STEP 7 V5.5) 

If you have any further question, please ask!