1 1

CO₂ monitoring with room control

€9,90 EUR
€9,90 EUR
Sale Sold out

Description
This SCL function block FB_CO2_Lueftung monitors the CO₂ content in indoor spaces, automatically controls ventilation, offers a manual override mode, and takes window status into account. Ideal for optimal air quality, it's ready to run in the Siemens TIA Portal.

Note: All modules are designed exclusively as a learning and optimization basis and are not approved for live operation. System modules, in particular, must be finally tested and commissioned by qualified personnel before productive use.

How it works

  1. Fault detected → Fan off, CO₂ alarm on, HMI “FAILURE”, RETURN
  2. Manual ventilation active → Fan permanently on, CO₂ alarm off, RETURN
  3. CO₂ value > CO2_ThresholdMax → Fan on, CO₂ alarm on, HMI "ALARM: CO2 > Limit"
  4. CO₂ between CO2_ThresholdAlarm and CO2_ThresholdMax →
    • WindowOpen = FALSE → Fan on, HMI “AUTO: Ventilation ON”
    • WindowOpen = TRUE → Fan off, HMI “Window open – no fan”
  5. CO₂ ≤ CO2_ThresholdAlarm → Fan off, CO₂ alarm off, HMI "OK"

Technical details
• Inputs: Fault, ManualVentilation, CO2_ppm, CO2_ThresholdAlarm, CO2_ThresholdMax, WindowOpen
• Outputs: FanOn, CO2_Alarm, StatusText_HMI
• PRIORITY: Fault → Manual → Automatic
• IF/ELSIF logic for three-stage CO₂ assessment and window testing
• RETURN in case of fault or manual operation ends logic

Possible applications
• Classrooms, offices, conference rooms, laboratories
• Retrofitting in existing buildings
• Training and demonstration facilities for PLC environmental monitoring

compatibility
• Siemens S7-1200 & S7-1500
• TIA Portal V13 or higher; recommended V16+ for HMI visualization and PLCSIM

Scope of delivery
• .scl file with input/output declarations, CO₂ thresholds, window and fault logic
• Header comments for threshold values and HMI texts
• Download link immediately after purchase

Support
I can help you adjust your CO₂ thresholds, integrate additional sensors or HMI displays, and integrate them into your automation architecture. Get in touch anytime via shop message or email.