Error: The PROFINET controller '...' contains '...' PROFINET devices with RT class IRT. The maximum number is '...'.
Reduce the number of Isochronous RealTime (IRT) devices or, if suitable for your application, operate some IRT devices in RT mode.
Selecting the RT class 'RT' in order to switch the device to RealTime mode is done in the 'Interface' editor of the respective device. To open this editor, double-click the corresponding node in the PLANT.
Example:
