Siemens PPU 26x.3 series Manual page 26

System description
2.3 Operator controls and display elements
The time is reset and the screen goes bright again as a result of the following events:
● An alarm or a message occurs
● Sensor signal for a PPU with a proximity switch
● Operation via the keys and softkeys on the PPU
● Operation via the machine control panel
● Operation with a mouse connected via USB
● Operation via the VNC viewer
Dark-switching sequence
The default setting of interface signal DB1900.DBX5000.1 = 0 has the following function:
The screen is switched dark in two stages.
1. The first stage takes effect after three minutes. This interval cannot be changed and has a
very positive effect on the service life of the screen. In the first stage, the screen is dimmed
to 20% of the current brightness value. This tells the operator that the screen will soon go
dark (screensaver).
2. The screen is darkened when the time set in the display machine data
MD9006 $MM_DISPLAY_SWITCH_OFF_INTERVAL elapses. The default setting is 15
minutes.
If the interface signal DB1900.DBX5000.1 = 1 is set, the MD9006 is not effective and the screen
is switched dark straight away without dimming beforehand.
Supplementary conditions for the optimum effect
The optimum effect of the sensor is guaranteed under the following supplementary conditions:
● The front must be kept clean because the sensor functions with infrared light.
● There must be no foreign bodies or objects in the detection area.
● A protective film on the front of the control affects the detection area of the sensor.
References
SINUMERIK 828D List Manual: NC variables and interface signals /828D_LH2/
26
PPU and components
Manual, 10/2015, 6FC5397-2DP40-5BA3