All access control units make autonomous decisions by default, relying on the access control settings downloaded from Security Center during unit synchronization. The unit only falls back on the Access Manager role when it’s presented with an unknown credential.
Online operation
The access control unit is operating online when it’s connected to its Access Manager role. The unit makes decisions on its own, based on the access control settings (access rules, cardholders, credentials, unlock schedules, and so on) downloaded from Security Center when it was last synchronized.
When the access control settings are changed in the system, the Access Manager automatically updates the units that are affected by the change, every 15 seconds. For HID units, you can also configure the synchronization to be carried out daily, weekly, or on demand. When an unknown credential is presented, the unit immediately queries its Access Manager to make the correct decision, and thus, updates its memory at the same time.
As long as the unit remains connected to its Access Manager, it reports every access decision it makes (Access granted and Access denied) and all activities (Door opened, Door closed, Entry detected, and so on) in real time to the Access Manager. The Access Manager can override a decision to deny access if it contradicts the current settings in Security Center.
Server mode
Offline operation
The access control unit operates offline when the connection to its Access Manager role is lost. When operating offline, the unit appears in red in Config Tool and Security Desk.