Profinet Error (PNIO0004): The Profinet controller '...' has reached RAM capacity. Reduce the number of devices.
The Profinet controller is not able to handle the number of Profinet devices contained under the Profinet controller node in the PLANT.
Depending on the total number of process data items provided by all Profinet devices involved, the Profinet Controller may only be able to handle less devices than the maximum allowed number specified in the device description file of the controller.
Remedy
Reduce the number of devices under the Profinet Controller node in the PLANT.