Hello, I am established connection between s7-200 smart plc and WinCC RT Advance V15.1 , I have 40 Nos. S7-200 smart plc configure with WinCC RT Advance but WinCC RT allowed only max 16 HMI connection. How I can establish 40 connection with winccrt advance, please suggest me. 

How many number of HMI connection is possible WinCC RT Advance.

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Split from Tia v15.1-The problem connection between WinCC professional with S7-1200.

Hi,

I believe that for RT advanced, only 8 connections are applicable at once.

Unfortunately, this number cannot be increased and the fact is that from the ninth connection, the communication of the RT with the controllers could not be guaranteed.

For this reason, I would recommend that you perhaps communicate several controllers with each other and have one controller collect the data and then communicate this one with the RT Advanced, instead of communicating all controllers directly with the RT.

Another option would be to change the system for an RT Professional, which does allow communication with significantly more controllers.