HEIDENHAIN TNC 620 (340 56x-02) ISO programming - Manual (Page 314)

314 Manual Operation and Setup
12.1 S
w
itc
h
-On, S
w
itc
h
-Of
f
12.1 Switch-On, Switch-Off
Switch-on
Switch on the power supply for control and machine. The TNC then
displays the following dialog:
TNC is started
TNC message that the power was interrupted—clear
the message
The PLC program of the TNC is compiled automatically
Switch on external dc voltage The TNC checks the
functioning of the EMERGENCY STOP circuit
Cross the reference points manually in the displayed
sequence: For each axis press the machine START
button, or
Cross the reference points in any sequence: Press
and hold the machine axis direction button for each
axis until the reference point has been traversed.
Switch-on and crossing over the reference points can vary
depending on the machine tool. Refer to your machine
tool manual.
SYSTEM STARTUP
POWER INTERRUPTED
COMPILE PLC PROGRAM
RELY EXT. DC VOLTAGE MISSING
MANUAL OPERATION
TRAVERSE REFERENCE POINTS
If your machine is equipped with absolute encoders, you
can leave out crossing the reference marks. In such a
case, the TNC is ready for operation immediately after the
machine control voltage is switched on.