Siemens sinumerik 840D sl Operating Manual page 64

Setting up the machine
2.4 Settings for the machine
The actual value can be set in both the Reset and Stop state.
Note
Setting the WO in the Stop state
If you enter the new actual value in the Stop state, the changes made are only visible and
only take effect when the program is continued.
Procedure
Resetting the actual value
NOTICE
Irreversible active work offset
The current active work offset is irreversibly deleted by this action.
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1. Select "JOG" mode in the "Machine" operating area.
2. Press the "Set WO" softkey.
3. Enter the new position value for Z or X directly in the actual value
display (you can toggle between the axes with the cursor keys) and
press the <INPUT> key to confirm the entries.
- OR -
Press softkey "Z=0" or "X=0" to set the required position to zero.
Press the "Delete active WO" softkey.
The offset is deleted permanently.
Operating Manual, 07/2010, 6FC5398-8CP40-0BA0
Turning