Profinet Error (PNIO0009): The Profinet controller '...' is overloaded. Consider decreasing the reduction ratios or removing a Profinet device.
Remove one or more devices from the PLANT or reduce the 'Reduction ratio' of devices. This has to be done in the 'Interface' settings of the respective device.
Example:
For more information refer to the tooltips in the 'Settings' editor of the Interface by hovering the mouse pointer on the 
symbol.