Siemens SIDOOR AT12 - Functions and Device Responses; Learn, Test Run, and Commands

Functions and device responses
5.12 Overload protection
Elevator door drive AT12
14 Equipment Manual, 06/2020, A2B00086683-AD
5.12 Overload protection
If the drive motor is subjected to severe strain by DOOR OPEN and DOOR CLOSE commands
repeated in quick succession, the hold-open time is automatically increased. The next closing
movement is delayed, even if a DOOR CLOSE command is present, the LED flashes red 4
times.
This function prevents the motor from overheating.