Siemens SINUMERIK 840D sl Function Manual page 39

Screen darkening via keyboard/automatic screen saver
If no buttons are pressed on the operator panel front within the assigned time (default = 3
minutes):
MD9006 $MM_DISPLAY_BLACK_TIME
(time for screen darkening), the screen is automatically darkened.
The screen lights up again the first time a button is pressed following darkening. Pressing a
button to lighten the screen will not generate an operator action.
Parameterization:
DB19 DBX0.1 = 0
MD9006 $MM_DISPLAY_BLACK_TIME > 0
DB19 DBX0.2 (key disable)
All inputs via the connected keyboard are inhibited.
DB19 DBX 0.3 / 0.4 (Delete cancel alarms / Delete recall alarms) (HMI Advanced)
Request to delete all currently pending alarms with Cancel or Recall delete criterion. Deletion
of the alarms is acknowledged via the following interface signals.
● DB19 DBX20.3 (cancel alarm deleted)
● DB19 DBX20.4 (recall alarm deleted)
DB19 DBX0.7 (actual values in WCS, 0=MCS)
Switching over of actual-value display between machine and workpiece coordinate system:
● DB19 DBX0.7 = 0: Machine coordinate system (MCS)
● DB19 DBX0.7 = 1: Workpiece coordinate system (WCS)
DB19 DBB13 (control of the file transfer via hard disk) (HMI Advanced only)
Job byte to control file transfer via hard disk. The jobs relate to the user control file in the
interface signals:
DB19 DBB16 (part program handling: Number of the control file for user file names)
DB19 DBB17 (part program handling: Index of the file to be transmitted from the user list)
DB19 DBB16 (control of file transfer via hard disk) (HMI Advanced only)
Control byte for file transfer via hard disk to define the index for the control file (job list). This
file is handled according to the job in the interface signal:
DB19 DBB13
Basic Functions
Function Manual, 01/2015, 6FC5397-0BP40-5BA2
A2: Various NC/PLC interface signals and functions
2.2 NC/PLC interface signals - only 840D sl
39