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• Error: Topology error of the connected PROFINET IRT devices.

Error: Topology error of the connected PROFINET IRT devices.

This topology error may have one of the following reasons:

Reason 1

A device of the RT class 'RT' is located in an Isochronous RealTime (IRT) bus segment, where it is not allowed.

Either replace the respective device by an IRT device or select the RT class 'IRT' in order to switch it to Isochronous RealTime mode. This is done in the 'Interface' editor of the device. To open this editor, double-click the error message. Alternatively, you can double-click the corresponding node in the PLANT.

Example:

Reason 2

A ring topology has been defined. Correct the topology.