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Topology issue with scalance x-101-1

6/15/2021 1:38 PM	Rate (0)
goldberg Regular Member Joined: 8/1/2017 Last visit: 8/31/2025 Posts: 10 Rating: (0)	Hello, I have a problem with adding the Scalance X-101-1 in network topology of a TIA portal V15.1 project. I add the device with the correct catalogue number (6GK5 101-1BC00-2AA3) to my hardware configuration topology view, add the connections as they are - one fiber optic cable link to the scalance switch and one profinet cable from the scalance switch to an ET 200SP module. When I download this hardware configuration the connection lines turn red and I get the error that ET200SP is connected to a different partner from what is expected. please refer to picture 1 if I am unclear. And when I just remove this scalance switch from the topology everything is showing as ok - picture 2. Any ideas on what could be the problem? And a related, more general question is, do I even need to define the topology? because it seems that everything works the same with or without topology Attachment topology issue.png (433 Downloads)

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6/15/2021 1:40 PM	Rate (0)
ChristophD Grandmaster Joined: 5/12/2006 Last visit: 9/2/2025 Posts: 22709 Rating: (3071)	for unmanaged switches you need no topology an can remove it from the network topology in the project

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6/15/2021 2:00 PM	Rate (0)
goldberg Regular Member Joined: 8/1/2017 Last visit: 8/31/2025 Posts: 10 Rating: (0)	Thank you for the quick reply. But in that case the ET 200 module just "hangs in the air", not connected to anything. Is that not a problem? Do I even need to define topology if I don't have a ring configuration?

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6/15/2021 2:02 PM	Rate (0)
ChristophD Grandmaster Joined: 5/12/2006 Last visit: 9/2/2025 Posts: 22709 Rating: (3071)	is no problem if et200 not connected in topology (not in network!) topology is need for ring and PROFINET IO IRT , the a topology is mandatory and you need managed devices

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6/15/2021 2:04 PM	Rate (0)
goldberg Regular Member Joined: 8/1/2017 Last visit: 8/31/2025 Posts: 10 Rating: (0)	So only for the ring? If I don't have a ring I don't need topology at all?

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6/15/2021 2:05 PM	Rate (0)
ChristophD Grandmaster Joined: 5/12/2006 Last visit: 9/2/2025 Posts: 22709 Rating: (3071)	ring or IRT if you have a line of devices which need PROFINET IO IRT then also a topology is need

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This contribution was helpful to 2 thankful Users goldberg Duris_I

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