A wireless access control system and method is described which permits wireless communication between a remote access controller and a central access controller on an “on demand” basis. The remote access controller can determine the state of the locking mechanism without communication to the central access controller when a valid access request is presented. However, if an invalid access request is presented, a remote wireless communicator will be placed in its transmission mode to request updated user control data from the central access controller. The remote wireless communicator can also be placed in its transmission mode to request updated user control data from the central access controller by a communication command input at a remote programming mode device.