Abstract: The invention relates to a method for determining an access right to an entity of a conveyor system, wherein it is: received data comprising data representing an identity of a wireless key and data representing a location of the wireless key; detected that the wireless key resides in a predefined location; identified the conveyor system and the entity on a basis of data representing the predefined location; determined status of an identified conveyor system; determined an access right with the wireless key to the entity; and generated a control signal to cause one of the following: (i) a grant of an access to the entity, (ii) a refusal of an access to the entity. The invention also relates to a network node, a computer program product and to a conveyor system.