How many IEDs can be connected to the wincc OA Server ?

interelec · Post by **interelec** » Sat Jun 04, 2022 3:37 pm

I know that wincc OA has no limit on the number of device connection.
In my project, a total of about 300 IEDs will be connected to the OA redundant server.
But, I read about 61850 client in OA Help and found the following limitations.
"The driver can establish connection up to a maximum of 200 devices."

Does that mean that there is only a maximum of 200 IED connections per OA server? Or does it mean that up to 200 units can be connected per one 61850 driver?

leoknipp · Post by **leoknipp** » Fri Jun 10, 2022 10:27 am

You have send the same question also to the WinCC OA Support and it was already by this team.
Please refer to the answer you got from the support team.
The limitations for a driver are described in the WinCC OA Documentation.

Best Regards
Leopold Knipp
Senior Support Specialist

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