Siemens SIMATIC S7-1500R/H Getting Started page 41

Programming
Flow diagram for lighting control in FB30
Control of the entry and interior lights in the tunnel sections.
FB30 calls FB31. The user program controls the turn-on light according to the status of the
outdoor light sensor.
The user program controls the interior lights according to the respective time of day or
enables manual mode:
● Daylight: 8:00 am to 6:00 pm
● Night light: 8:00 pm to 6:00 am
● Twilight light: 6:00 am to 8:00 am and 6:00 pm to 8:00 pm
Figure 3-4 Flow diagram for lighting control in FB30
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S7-1500R/H redundant system
Getting Started, 10/2018, A5E44910930-AA