Description
The FB_VibrationMonitoring function block evaluates an analog vibration signal, scales it to a standard value (e.g., 0–1 g or 0–100 mm/s), and responds in stages with a warning or shutdown. It sets alarm flags and controls shutdown logic. 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 all warning/alarm flags,Abschaltung=TRUE,StatusText=“NOT-AUS aktiv – Test gestoppt”, RETURN -
Scaling :
→ Raw value Vib_RAW divided by 27648 →Vibration -
Operation (
Start=TRUE):-
Vibration ≥ NotSchwelle→AlarmAbschalt=TRUE,Abschaltung=TRUE -
WarnSchwelle ≤ Vibration < NotSchwelle→AlarmWarnung=TRUE -
Vibration < WarnSchwelle→ no alarms
-
-
Acknowledgement (
Quittieren=TRUE):
→AlarmAbschalt=FALSE,Abschaltung=FALSE,StatusText=“Quittiert – bereit für neuen Zyklus”
Technical details
- Inputs: Stop (BOOL), Vib_RAW (INT), Start (BOOL), WarningThreshold (REAL), EmergencyThreshold (REAL), Acknowledge (BOOL)
- Outputs/Variables: AlarmWarning, AlarmShutdown, Shutdown (each BOOL), StatusText (STRING)
- Calculation: Vibration = Vib_RAW / 27648.0
- Logic: IF/ELSIF sequence with RETURN abort on stop, no timer
Possible applications
Vibration monitoring on rotating or vibrating machines, pump and engine test benches, in laboratory and production plants with staged alarms.
compatibility
Siemens S7-1200/S7-1500, TIA Portal ≥ V13 (V16+ recommended for HMI/PLCSIM).
Scope of delivery
.scl file with input/output declarations and variable comments. Download link after purchase.
Support
Adjustment of threshold values, integration of additional sensors or HMI layouts – individual advice via shop message or email.