Gas station control (Mini-Sim)

This SCL function block FB_Tankanlage controls a simple tank system with safety monitoring, quantity recording, time limit, and acknowledgment via the HMI. Runnable in the Siemens TIA Portal, it ensures safe and transparent refueling processes.

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. Cycle start: Reset markers/outputs, HMI “READY”

2. Fault/full signal/gun not pulled → valve off, timer off, alarm on, HMI "STOPPED", Finished=TRUE

3. Start_Fueling + no stop → Open valve, fueling process in progress

4. 1-second timer ticks → Increment LiterPerSec, PricePerLiter, FuelTimeCounter, Sum up Liters & Price

5. Tank time counter ≥ MaxTime → Valve off, Finished=TRUE, HMI "TIME LIMIT"

6. Reset_Tank → reset all counters, alarm, finished, HMI “READY”

Technical details
• Inputs: Fault, Full Message, Gun Pulled, Start_Fuel, Reset_Tank
• Outputs: Valve_ON, Alarm, StatusText_HMI
• Internal variables: Liter, Price, Tank Time Counter, Finished
• TON timer (PT=T#1s) for second cycle
• LiterPerSec & PricePerLiter define flow rate/tariff
• INT_TO_STRING/REAL_TO_STRING for HMI strings

Possible applications
• Fuel and liquid filling systems
• Mobile refueling units
• Industrial processes with volume and time control
• Training on PLC process controls

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

Scope of delivery
.scl file with declaration of all inputs/outputs, timers, variables, state transitions, and comment blocks; download link available immediately after purchase

Support
Flow rate adjustment, additional safety features, HMI layout integration or data logging/reporting available upon request via shop message or email.