HEIDENHAIN iTNC 530 43
1.2 Machine Switch-On
1.2 Machine Switch-On
Acknowledge the power interruption and move 
to the reference points
U Switch on the power supply for control and machine. The TNC starts 
the operating system. This process may take several minutes. Then 
the TNC will display the message “Power interruption.”
U Press the CE key: The TNC converts the PLC 
program
U Switch on the control voltage: The TNC checks 
operation of the emergency stop circuit and goes into 
the reference run mode
U Cross the reference points manually in the displayed 
sequence: For each axis press the machine START 
button. If you have absolute linear and angle encoders 
on your machine there is no need for a reference run
The TNC is now ready for operation in the Manual Operation mode.
Further information on this topic
 Traversing the reference marks: See “Switch-on” on page 438
 Operating modes: See “Programming and Editing” on page 67
Switch-on and crossing the reference points can vary 
depending on the machine tool. Your machine manual 
provides more detailed information.