Abstract: A control device controls an elevator system in inspection mode, the elevator system having a safety circuit with at least one safety contact that is open in inspection mode and an inspection path for bridging the safety contact. The control device includes first and second operating elements for controlling the inspection mode and first and second switching units connected in parallel and each having a contact associated with a delay means. The switching units close and open their contacts in response to actuation and release of the first and second operating elements respectively. The contacts are series connected in the inspection path. The first and second delay means delay opening of the associated contacts by defined delay times after the release of the first and operating element respectively.

Abstract: A control unit, an elevator-monitoring apparatus and a method are used to monitor a maintenance mode of an elevator installation. The control unit has a controller and a memory device, wherein the controller receives a first signal when a locking device of shaft door is locked and receives a second signal when the locking device is unlocked. The controller compares a chronological signal sequence of first signals and second signals with a reference sequence stored in the memory device for actuation of the locking device and, if the signal sequence of the first signals and second signals matches the reference sequence, ends the maintenance mode and releases a car of the elevator installation for a traveling operation.

Abstract: A method for controlling a maintenance mode of an elevator system includes: recognizing a machine-detectable feature in an automated manner using a portable computer-controlled device of a technician and, subsequently, outputting a maintenance completion signal, the machine-detectable feature being within the elevator system such that it can only be detected by the computer-controlled device located outside an elevator shaft of the elevator system and wherein the machine-detectable feature is uniquely assigned to the elevator system; receiving the maintenance completion signal by an elevator controller controlling the maintenance mode and, subsequently, completing the maintenance mode. The method and an elevator control arrangement configured to carry out the method enables a maintenance mode to be completed by the technician in the elevator system in a simple, intuitive, and safe manner without the need for significant additional hardware.

Abstract: Inspection control system switches elevator system between normal and inspection modes and includes: operating device and at least one emergency stop switch in elevator shaft for deactivating normal and/or inspection mode, for preventing and/or interrupting movement of car. In inspection mode, car is manually controlled by operating device via electric motor, wherein elevator system is switched to normal mode or inspection mode by switch of operating device. Inspection control system also includes: detection device for detecting open and/or closed shaft door, alarm generator, operating switch for activating and/or blocking electric motor, control unit that monitors switching state and actuation sequence of switch and emergency stop switch and compares both with reference switching state and reference sequence with regard to detected state of shaft door.

Abstract: A control unit, an elevator-monitoring apparatus and a method are used to monitor a maintenance mode of an elevator installation. The control unit has a controller and a memory device, wherein the controller receives a first signal when a locking device of shaft door is locked and receives a second signal when the locking device is unlocked. The controller compares a chronological signal sequence of first signals and second signals with a reference sequence stored in the memory device for actuation of the locking device and, if the signal sequence of the first signals and second signals matches the reference sequence, ends the maintenance mode and releases a car of the elevator installation for a traveling operation.