The purpose of the Anti-Passback feature is to protect against the possibility to use an user
credentials at entry to the zone if it had not been used at exit before. To put it differently, the user
can not enter the APB zone if he had not left it before. The function is aimed to protect against the
possibility that one user passes its card to another user to allow him to enter the zone.
APB Reset Schedules are used for resetting status of this function. Directly after the reset, every
user registered on the controller has unspecified status in the APB registry (it can not be said if his
last login was on entry or on exit). Because of that, every user can use his credentials both on entry
and on exit. From the moment the status was reset, the controller begins to enforce a need to
follow APB rules.