The building automation system is a comprehensive system composed of a central computer and various control subsystems, which mainly includes:

1. Monitoring of drainage and exhaust system

2. Monitoring of power supply lighting system

3. Elevator operating status monitoring

4. Anti-theft alarm system

5. Entrance and exit access control system

6. Security inspection system, etc.

Considering the reliability of the whole system, we can use PLC to act as the central computer.

If you feel that one PLC has insufficient computing power to cope with large-scale building automation management purposes, you can connect multiple PLCs through the bus to form a block-controlled DCS system.

The PLC program can be changed flexibly and has strong anti-interference ability, making it a perfect partner for building automation control.