ELEVATOR SAFETY SYSTEM AND METHOD OF MONITORING AN ELEVATOR SYSTEM

An elevator safety system for an elevator system (2) with at least one door (20, 61, 81, 91) and an elevator car (12), which is movable along a hoistway (4) between a plurality of landings (6, 8, 9), comprises: at least one position sensor (25), which is configured for determining a position value representing the position of the elevator car (12) within the hoistway (4); at least one door sensor (23, 63, 83, 93), which is configured for detecting whether the at least one door (20, 61, 81, 91) is closed; a limit setting unit (32), which is configured for determining an operation status of the elevator car (12) and for setting at least one position limit according to the determined operation status; and a comparison unit (34), which is configured for comparing the determined position value with the set position limit and for determining an error condition, if the position value is not in compliance with the at least one position limit and the at least one door sensor (23, 63, 83, 93) indicates that at least one door (20, 61, 81, 91) is not closed.