Siemens 810d control stuck at Siemens boot screen - SiePortal
To resolve this, you generally need to perform a general reset of the NCK and PLC and then reload your machine-specific backups (.ARC files). 1. Check the CCU Status Look at the 7-segment display on the CCU card: Sinumerik 810D - Waiting for response from nck - SiePortal sinumerik 810d waiting for nck connection