Breast pump control

Description
This SCL function block FB_PumpControl controls a pump with dry-running protection, optional cleaning mode, and tank monitoring. Runnable in the Siemens TIA Portal, it ensures safe and maintenance-friendly pump operation.

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. TankLeer = TRUE → Pump off, alarm on, StatusText = "Dry run - Pump OFF", RETURN
2. Cleaning mode = TRUE → Pump on, timer (PT=T#2m) is running, pump off after 2 minutes, status text = "Cleaning completed", RETURN
3. Normal operation:

• StartAuto = TRUE OR ManuStart = TRUE AND TankVoll = FALSE → Pump on, StatusText = "Pump running"
• TankFull = TRUE → Pump off, StatusText = "Tank full – Pump OFF"

No release → Pump off, StatusText = "Waiting for start"

Technical details
• Inputs: TankEmpty, Cleaning Mode, StartAuto, ManuStart, TankFull
• Outputs: Pump (BOOL), Alarm (BOOL), StatusText (STRING)
• ON-TONE timer (PT=T#2m) for cleaning mode
• RETURN under safety conditions to immediately abort all actions

Possible applications
• Irrigation, dosing and conveying systems
• Retrofit for dry-running protection in existing pump systems
• Training and demonstration projects on PLC safety and maintenance procedures

compatibility
Siemens S7-1200 & S7-1500; TIA Portal V13 and higher (V16+ recommended for HMI & PLCSIM)

Scope of delivery
.scl file with input/output declarations, timer instance, state logic, and header comments; download link after purchase

Support
Adjustment of cleaning intervals, additional protection functions or HMI layouts on request via shop message or email.