Fire protection control with smoke detector

Description
You're looking for an SCL function block (FB_Fire Protection Control) that responds to smoke or manual fire alarms, releases all escape doors, shuts off the ventilation, and issues alarm messages to the HMI or fire department. Ready for immediate use 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

1. Smoke or manual alarm message detected → set internal fire status
2. Activate alarm, door release, ventilation shutdown, flashing light and HMI/fire brigade message
3. Acknowledgement only possible if there is no longer a fire alarm
4. After pressing the acknowledge button and system reset → reset all outputs, system ready for operation

Technical details
• Inputs: smoke detector, manual alarm, acknowledgement, system release
• Outputs: central alarm, door release, ventilation shutdown, flashing light, HMI/fire brigade message, system readiness
• Internal variable #BrandAusgeloest controls the alarm cycle
• Protection functions active immediately in case of alarm, reset only after clear condition + acknowledgement

Possible applications
• Fire protection in office and industrial buildings
• Escape route control in the event of fire
• Integration into HMI control systems or training environments

compatibility
• Siemens S7-1200 & S7-1500
• TIA Portal V13 and higher; recommended V16+ for extended HMI functions

Scope of delivery
• .scl file with input/output declarations, fire status variables and section comments
• Header: Version 1.0, as of June 19, 2025, Author, Website

Support
• Adaptation to additional sensors
• Advanced alarm messages
• Integration into individual HMI interfaces