HEIDENHAIN TNC 640 User Manual page 67

First Steps with the TNC 640 | Machine switch-on
Switch on the power supply for control and machine
The control starts the operating system. This process may
take several minutes.
The control will then display the "Power interrupted" message
in the screen header.
Press the CE key
The control compiles the PLC program.
Switch on the machine control voltage
The control checks operation of the emergency
stop circuit and goes into Reference Run mode.
Cross the reference point manually in the
prescribed sequence: For each axis press the
START key. If you have absolute linear and angle
encoders on your machine there is no need for a
reference run
The control is now ready for operation in the
Manual operation mode.
Further information on this topic
Approaching reference points
Further information:
Operating modes
Further information:
HEIDENHAIN | TNC 640 | ISO Programming User's Manual | 10/2017
"Switch-on", page 664
"Programming", page 92
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