Siemens SINUMERIK 840D sl Commissioning Manual page 45

The physical units of machine data are displayed on the right-hand side of the input field.
For each machine data item, an activation type can be read in the column on the right.
so
cf
re
po
Proceed as follows
...
...
HMI sl (IM9)
Commissioning Manual, 07/2007, 6FC5397-1DP10-2BA0
Immediately active: no action required
Configuration: "Set MD to active" softkey
Reset: "Reset" key on the machine control panel
POWER ON: "NCK reset" softkey
1. Select the "Startup" operating area.
2. Press the "Mach. data" softkey.
3. Press the "General MD", "Channel MD", or "Axis MD" softkey.
The "General MD", "Channel-specific MD", or "Axis-specific MD"
window opens.
4. Position the cursor on the entry to be modified and enter the required
value.
5. Press the "Set MD to active" or "NCK" softkey, depending on the
activation type specified.
Machine and setting data
5.2 Displaying/editing machine data
39