Car wash simulation

Description
This SCL function block FB_Car Wash fully automatically controls six car wash phases and integrates emergency stop safety, traffic light control, pre-cleaning, brush washing, rinsing, and drying. It runs in the Siemens TIA Portal for efficient car wash systems.

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. Emergency stop active → Conveyor belt, spray arch, brushes & dryer off, traffic light_red on, set error flag, HMI "EMERGENCY STOP ACTIVE", RETURN
2. Phase 0: Wait for vehicle front + start
3. Phase 1: Pre-cleaning (5 s via TON timer)
4. Phase 2: Brush wash (7 s)
5. Phase 3: Rinse (4 s)
6. Phase 4: Drying (5 s)
7. Phase 5: Traffic light_Green on, conveyor belt on → vehicle to exit
8. Leave vehicle position → phase back to 0

Technical details
• Inputs: Emergency Stop, Vehicle Front, Start, Vehicle Position, Full Report, Reset
• Outputs: Conveyor belt, spray arch, brushes, dryer, traffic light_red, traffic light_green, error, status text_HMI
• ONE-TONE timer (StepTimer) with variable PT for all time phases
• INT variable #Phase in CASE structure, RETURN in case of emergency stop

Possible applications
• Automatic car washes in petrol stations and car wash parks
• Fleet cleaning solutions
• Training and demo systems for PLC safety and HMI visualization

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

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

Support
Adjustment of time specifications, additional safety/diagnostic functions, individual HMI design or control system connection on request via shop message or email.