A method for operating a passenger conveyor system, wherein the passenger conveyor system has a controller for controlling functionalities of the passenger conveyor system, and also a safety device for monitoring a safety-relevant function of the passenger conveyor system; wherein the safety device can be configured to be in a "configured" state by storing a target configuration parameter, so as to then monitor the safety-relevant function according to certain specifications; wherein the method comprises the steps of receiving a first configuration parameter and receiving a second configuration parameter created independently of the first configuration parameter, by the controller, the first configuration parameter and the second configuration parameter relating to the same target configuration parameter; transmitting the first configuration parameter and the second configuration parameter to the safety device; comparing the first configuration parameter and the second configuration parameter in the safety device and, in the event that the first configuration parameter and the second configuration parameter match within a prespecified tolerance, storing a target configuration parameter corresponding to the first configuration parameter and the second configuration parameter in the safety device and transmitting the target configuration parameter and/or a "configured" signal from the safety device to the controller; wherein the controller controls the functionalities of the passenger conveyor system according to whether it has received the target configuration parameter and/or the "configured" signal. wherein the passenger conveyor system has a controller for controlling functionalities of the passenger conveyor system, and also a safety device for monitoring a safety-relevant function of the passenger conveyor system; wherein the safety device can be configured to be in a "configured" state by storing a target configuration parameter, so as to then monitor the safety-relevant function according to certain specifications; wherein the method comprises the steps of receiving a first configuration parameter and receiving a second configuration parameter created independently of the first configuration parameter, by the controller, the first configuration parameter and the second configuration parameter relating to the same target configuration parameter; transmitting the first configuration parameter and the second configuration parameter to the safety device; comparing the first configuration parameter and the second configuration parameter in the safety device and, in the event that the first configuration parameter and the second configuration parameter match within a prespecified tolerance, storing a target configuration parameter corresponding to the first configuration parameter and the second configuration parameter in the safety device and transmitting the target configuration parameter and/or a "configured" signal from the safety device to the controller; wherein the controller controls the functionalities of the passenger conveyor system according to whether it has received the target configuration parameter and/or the "configured" signal.