Siemens SIMATIC S7-1500R/H Getting Started page 36

States in the tunnel
The user program implements 3 states in the tunnel:
Everything is OK: The air quality sensors measure values within the permissible range:
● The traffic lights are green.
● The barriers are open.
● The motors for ventilation are in Stop mode, only the flow of air moves the fans.
The air quality sensors measure an increased concentration of pollutants between mean and
maximum value:
● The fans immediately run at low level (slow) for at least 30 seconds. The direction of
rotation of the fans depends on the extent of the load in the tunnel section and the
distance to the exit.
● The traffic lights are still green.
● The barriers are still open.
The air quality sensors measure a pollutant concentration above the maximum value:
● The fans run immediately at the highest level (fast) for at least 30 seconds. The direction
of rotation of the fans depends on the affected tunnel section and the distance to the exit.
● If the fans did not provide sufficient air within 2 minutes, the tunnel will be blocked:
– The traffic lights are first yellow, then red.
– The barriers close.
Default tag table
The standard tag table contains the PLC tags for the 3 parts of the user program.
Name
Air quality measurement and fan control in tunnel section 1
sectionOneAirVisibility
sectionOneAirPollution
sectionOneVentBlowRight
sectionOneVentDrawLeft
sectionOneVentSlow
sectionOneVentFast
Traffic light and cabinet control in tunnel section 1
section1TrafficLightRed
section1TrafficLightYellow
sectionOneTrafficLightGreen
sectionOneBarrierUp
sectionOneBarrierDown
S7-1500R/H redundant system
Getting Started, 10/2018, A5E44910930-AA
Data type Address
Int IW3
Int IW5
Bool Q2.0
Bool Q2.1
Bool Q2.2
Bool Q2.3
Bool Q0.0
Bool Q0.1
Bool Q0.2
Bool Q1.0
Bool Q1.1
Description
Input word for turbidity sensor in section 1
Input word for air quality sensor in section 1
Output bit for clockwise rotation fan in section 1
Output bit for anticlockwise rotation fan in section 1
Output bit for low speed fan in section 1
Output bit for high speed fan in section 1
Output bit for red traffic light in section 1
Output bit for yellow traffic light in section 1
Output bit for green traffic light in section 1
Output bit for barrier in section 1
Output bit for barrier in section 1
Programming
35