To fix this, you must understand what is talking to what:
"Connection established," Elias whispered. He homed the axes, watching the tool carousel spin into place with a reassuring . The silence was finally over. troubleshooting guide sinumerik 810d waiting for nck connection
The message "" (or Alarm 120202) on a Sinumerik 810D indicates that the Human-Machine Interface (HMI) cannot communicate with the Numerical Control Kernel (NCK) . This is most frequently caused by a loss of internal memory data on the Compact Control Unit (CCU) due to a dead backup battery or an extended period of machine power-down. Common Causes To fix this, you must understand what is