Pressure monitoring system

Description
The FB_PressureMonitoring function block monitors a measured value for overpressure and underpressure, controls an action valve in the event of deviations, and reports status and alarms via HMI variables. The code, written in SCL, runs directly 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

• Stop ( Stop=TRUE ):
  → Reset alarms, Aktionsventil=FALSE , StatusText=“System gestoppt” , RETURN
• Monitoring ( Start=TRUE ):
  • DruckWert > Obergrenze → AlarmUeberdruck=TRUE , Aktionsventil=TRUE , StatusText=“Achtung: Überdruck!”
  • DruckWert < Untergrenze → AlarmUnterdruck=TRUE , Aktionsventil=FALSE , StatusText=“Achtung: Unterdruck!”
  • otherwise → Aktionsventil=FALSE , StatusText=“Druck im Sollbereich”
• Acknowledgement ( Quittieren=TRUE ):
  → AlarmUeberdruck=FALSE , AlarmUnterdruck=FALSE , Fehler=FALSE , StatusText=“Fehler quittiert – Überwachung läuft”

Technical details

• Inputs: Stop , Start , DruckWert , Obergrenze , Untergrenze , Quittieren
• Outputs: AlarmUeberdruck , AlarmUnterdruck , Fehler , Aktionsventil , StatusText
• Logic: simple IF/ELSIF structure, no timer
• Abort: in case of Stop or error, press RETURN to immediately shut down the system

Possible applications
Hydraulic/pneumatic systems, compressors, piping networks, laboratory and demonstration test benches.

compatibility
Siemens S7-1200/S7-1500, TIA Portal ≥ V13 (V16+ recommended for HMI/PLCSIM)

Scope of delivery
.scl file with input/output declarations, variables, and feedback parameters; download link after purchase.

Support
Adjustment of pressure limits, additional sensors or HMI layouts – individual advice via email or shop message.