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Max connection to S7-1200 on TIA WinCC Pro 17 ?

12/14/2024 10:48 AM	Rate (0)
khoatd Advanced Member Joined: 3/3/2011 Last visit: 12/17/2024 Posts: 4 Rating: (0)	Dear Experts, I'm facing a problem with my TIA WinCC Pro v17 application that's connected to 16 S7-1200 PLCs. While I can connect to all 16 PLCs individually, I'm only able to establish simultaneous connections with 14 of them. This is puzzling as the documentation states that a maximum of 64 connections should be supported. I'm seeking assistance in identifying the root cause of this limitation and finding a solution to allow all 16 PLCs to connect concurrently Looking forward to your help.
	Last edited by: khoatd at: 12/14/2024 11:46:12 Last edited by: khoatd at: 12/14/2024 12:56:16
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12/16/2024 10:10 AM	Rate (0)
ElonksuM_SN_BN Regular Expert Joined: 5/6/2022 Last visit: 9/9/2025 Posts: 589 Rating: (123)	Hi khoatd, From what you say, everything points to the possibility of a licensing issue. Do you have any license purchased to increase the communication of the RT Professional V17 with more PLCs? I believe that with the one that comes included you can communicate with 8 S7 PLCs. Then, in order to communicate and expand, you have to acquire softnet expansion licenses. Do you have any? Best regards!
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This contribution was helpful to 1 thankful Users Murof

12/18/2024 2:05 PM	Rate (0)
Murof Platinum Expert Joined: 8/3/2009 Last visit: 9/12/2025 Posts: 16409 Rating: (1935)	Hello khoatd Also the OS could be the limiting factor. Desktop OS like Win10/11 do only have a few network ressources. for bigger configuration you should use a Server OS Do you have installed SIMATIC Net PC SW? (and as already written you will need a full SIMATIC NET S7 Softnet license) Bye Murof
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