Sinumerik 810d Waiting For Nck Connection ((install)) <TRUSTED>

Based on years of discussions and case studies in Siemens support forums, the "Waiting for NCK connection" error is almost always caused by one of the following issues:

The display should count up from 0 to 6 (or A to F depending on firmware) and settle on a steady green "6" (or "0" or "8" – consult your manual). If it freezes on "1" or "4", the NCK is halted in hardware initialization. sinumerik 810d waiting for nck connection