Siemens SIMATIC S7-1500R/H Getting Started page 47

Programming
Controlling manual operation of the lamps individually
For maintenance tasks, it may be advisable to manually set the brightness in the tunnel. By
double-clicking on a symbol for a lamp, you access the automatic / manual operating mode
for the lighting in the corresponding tunnel section.
In the example, for the left interior light was set in tunnel section 2:
● Manual mode
● Night light
The lamp emits subdued light.
Figure 3-9
46
Controlling the HMI screen lamps individually
S7-1500R/H redundant system
Getting Started, 10/2018, A5E44910930-AA