Siemens SIMATIC S7-1500R/H Getting Started page 44

Limit values for air pollution
The "Air parameters" button is used to display the air pollution limit values (carbon monoxide
and turbidity) in the tunnel sections.
If a maximum value is exceeded after 2 minutes:
● The traffic lights are red
● The barriers close
● The fan sucks in / blows out air in the tunnel section at high speed, in the example in the
left direction (tunnel exit)
In the example in the screen, the air quality sensor measures the value 28 in tunnel section
1, the maximum limit value is 25.
In the example in the screen, the turbidity sensor measures the value 2. The value is below
the mean, therefore the view is in the normal range.
As soon as a mean value is exceeded:
● The traffic lights are green
● The barriers remain open
● The fan sucks in / blows out air in the tunnel section at low speed
You can change the mean and maximum value limits for each tunnel section.
Figure 3-6
S7-1500R/H redundant system
Getting Started, 10/2018, A5E44910930-AA
HMI screen for air pollution limit value
Programming
43