Monitoring device for an elevator system

A monitoring device for an elevator system having an elevator car for monitoring a movement of the elevator car, comprising:

• a sensor system for detecting a movement variable associated with the elevator car;
• an analysis device for evaluating the detected movement variable and comparing the detected movement variable to a threshold, and, if the threshold is exceeded by the detected movement variable, triggering a signal output to actuate a brake or catching device of the elevator car, wherein the monitoring device selects the threshold from specified thresholds based on a state of the monitoring device;
• and
• at least one of
• wherein specified thresholds comprise at least one normal operation threshold, and the monitoring device indicates a normal state as soon as specified connection elements are connected to the monitoring device;
• wherein the monitoring device selects the normal operation threshold from the specified thresholds as soon as the normal state is indicated;
• and
• wherein the analysis device compares the evaluated detected movement variable to the normal operation threshold;
• and,
• wherein the specified thresholds comprise an assembly threshold, and the monitoring device indicates an assembly state as long as specified ones of the connection elements are absent from connection to the monitoring device;
• wherein the monitoring device selects the assembly threshold from the specified thresholds as long as the assembly state is indicated;
• and
• wherein the analysis device compares the evaluated detected movement variable to the assembly threshold.