Method for operating a passenger transport system, wherein the passenger transport system has a controller for controlling functionalities of the passenger transport system, and at least one safety device for monitoring a safety-relevant function of the passenger transport system; wherein the safety device can be transferred into a "configured" state by storing a configured parameter, to then monitor the safety-relevant function according to certain specifications; wherein the method comprises: - receiving a configuration parameter by the controller; - transmitting the configuration parameter to the safety device; - storing a configured parameter in the safety device, based upon the received configuration parameter, to transfer the safety device into the "configured" state; characterized in that the method involves: - transmitting configured data from the safety device to the controller, wherein the configured data encode graphic information, wherein the graphic information is shown on a display connected to the controller, and wherein the graphic information uniquely reproduces the configured parameter in a visual, machine-readable manner; - reading out the graphic information, by means of an optical read-out sensor of a mobile, processor-controlled data processing device; and - comparing the configured parameter reproduced by the read-out graphic information with a target configuration parameter with the aid of the data processing device; - transmitting a result of said comparison from the data processing device to the controller; wherein the controller controls the functionalities of the passenger transport system according to whether a sufficient agreement between the configured parameter and the target configuration parameter was determined during the comparison. wherein the passenger transport system has a controller for controlling functionalities of the passenger transport system, and at least one safety device for monitoring a safety-relevant function of the passenger transport system; wherein the safety device can be transferred into a "configured" state by storing a configured parameter, to then monitor the safety-relevant function according to certain specifications; wherein the method comprises: - receiving a configuration parameter by the controller; - transmitting the configuration parameter to the safety device; - storing a configured parameter in the safety device, based upon the received configuration parameter, to transfer the safety device into the "configured" state; - receiving a configuration parameter by the controller; - transmitting the configuration parameter to the safety device; - storing a configured parameter in the safety device, based upon the received configuration parameter, to transfer the safety device into the "configured" state; characterized in that the method involves: - transmitting configured data from the safety device to the controller, - transmitting configured data from the safety device to the controller, wherein the configured data encode graphic information, wherein the graphic information is shown on a display connected to the controller, and wherein the graphic information uniquely reproduces the configured parameter in a visual, machine-readable manner; - reading out the graphic information, by means of an optical read-out sensor of a mobile, processor-controlled data processing device; and - comparing the configured parameter reproduced by the read-out graphic information with a target configuration parameter with the aid of the data processing device; - transmitting a result of said comparison from the data processing device to the controller; - reading out the graphic information, by means of an optical read-out sensor of a mobile, processor-controlled data processing device; and - comparing the configured parameter reproduced by the read-out graphic information with a target configuration parameter with the aid of the data processing device; - transmitting a result of said comparison from the data processing device to the controller; wherein the controller controls the functionalities of the passenger transport system according to whether a sufficient agreement between the configured parameter and the target configuration parameter was determined during the comparison.