The IO device specified in the detailed information has failed or is not present.
Check whether the failure belongs to an intended maintenance intervention.
Check whether the failure occurs once or is repeatedly coming/going.
Check whether there are more device failures and locate the failed device(s) in the IOSystem topology. Regard special device types (e.g. I devices, IE-IE-IOC)
Remedy:
Check power supply, network wiring and connectors.
The connection to the device was aborted due to a timeout in acyclic PROFINET services (connection establishment, data record read and write).
Remedy:
The device may be lost due to wiring problems, network problems, power-off of the device, or device failure.
Check wiring to the device.
Check whether the IP address of the IO device is in the same subnet as the IO controller.
Check for duplicated IP addresses of network participants on the physical network; use online access / update accessible devices, online assignment or similar tools. Check also non-PROFINET devices.