Unhindered public access despite locked door. For doctors' offices, lawyers' offices, etc. During visiting hours, the automatic control system triggers the door opener. The visitor rings the bell and, if the system is switched on, triggers the automatic system in the door opener control unit. After the set time (between 1 and 20 seconds) has elapsed, the door is unlocked for 1-10 seconds. During this time, the visitor can enter. The closed door is then locked again. Normal door opener function when the system is switched off. The automatic door opener control can be installed in any door opener system with effeff door openers (type 1).