Final answer:
The sub controllers in an access control system using a serial controller do not make decisions. In an access control system with a serial controller setup, it is true that sub controllers typically do not make independent decisions; they follow the main controller's directions.
Step-by-step explanation:
In an access control system using a serial controller, sub controllers do not typically make decisions. The serial controller serves as the main control unit and is responsible for managing and coordinating access to different areas or devices. Sub controllers, on the other hand, are connected to the serial controller and act as intermediaries between the serial controller and the devices they control.
In an access control system with a serial controller setup, it is true that sub controllers typically do not make independent decisions; they follow the main controller's directions.
In an access control system using a serial controller, it is generally true that sub controllers do not make independent decisions. Instead, sub controllers usually operate under the direction of a main controller. The main controller is responsible for processing information and making access decisions based on predefined rules or criteria. It sends commands to the sub controllers to control access to a door, for example, by locking or unlocking it upon receiving the necessary credentials.
This hierarchical model allows for centralized management and simplifies the overall system architecture. The sub controller's primary function is to interface with access control devices like card readers or biometric scanners and relay information back to the main controller. This arrangement improves security by not decentralizing decision-making processes to potentially less secure areas.