Method for transmitting data in an automation network with the aid of telegrams, wherein the automation network comprises a master subscriber and slave subscribers (115, 125, 135, 145, 155, 160, 165, 170, 175, 180, 185) which are connected to one another via a data line network, characterized in that the automation network comprises at least one unlocker (120, 130, 140) which is connected to the master subscriber and to the slave subscribers (115, 125, 135, 145, 155, 160, 165, 170, 175, 180, 185) via the data line network, wherein the slave subscribers (115, 125, 135, 145, 155, 160, 165, 170, 175, 180, 185) are divided into segments (300, 305, 310, 315, 320, 325), wherein each segment (300, 305, 310, 315, 320, 325) comprises at least one slave subscriber (115, 125, 135, 145, 155, 160, 165, 170, 175, 180, 185), wherein the master subscriber transmits locked telegrams each having a telegram identifier for processing by the slave subscribers (115, 125, 135, 145, 155, 160, 165, 170, 175, 180, 185) in order to assign a locked telegram to a segment (300, 305, 310, 315, 320, 325), wherein at least one segment (300, 305, 310, 315, 320, 325) is assigned to the at least one unlocker (120, 130, 140), wherein, if the at least one unlocker (120, 130, 140) receives a locked telegram, the at least one unlocker (120, 130, 140) checks, on the basis of the telegram identifier in the locked telegram, whether the locked telegram is intended for the segment (300, 305, 310, 315, 320, 325) assigned to the at least one unlocker (120, 130, 140) in order to release the locked telegram as an unlocked telegram for processing by the slave subscribers (115, 125, 135, 145, 155, 160, 165, 170, 175, 180, 185) provided that the locked telegram is intended for the segment (300, 305, 310, 315, 320, 325) assigned to the at least one unlocker (120, 130, 140). wherein the automation network comprises a master subscriber and slave subscribers (115, 125, 135, 145, 155, 160, 165, 170, 175, 180, 185) which are connected to one another via a data line network, characterized in that the automation network comprises at least one unlocker (120, 130, 140) which is connected to the master subscriber and to the slave subscribers (115, 125, 135, 145, 155, 160, 165, 170, 175, 180, 185) via the data line network, wherein the slave subscribers (115, 125, 135, 145, 155, 160, 165, 170, 175, 180, 185) are divided into segments (300, 305, 310, 315, 320, 325), wherein each segment (300, 305, 310, 315, 320, 325) comprises at least one slave subscriber (115, 125, 135, 145, 155, 160, 165, 170, 175, 180, 185), wherein the master subscriber transmits locked telegrams each having a telegram identifier for processing by the slave subscribers (115, 125, 135, 145, 155, 160, 165, 170, 175, 180, 185) in order to assign a locked telegram to a segment (300, 305, 310, 315, 320, 325), wherein at least one segment (300, 305, 310, 315, 320, 325) is assigned to the at least one unlocker (120, 130, 140), wherein, if the at least one unlocker (120, 130, 140) receives a locked telegram, the at least one unlocker (120, 130, 140) checks, on the basis of the telegram identifier in the locked telegram, whether the locked telegram is intended for the segment (300, 305, 310, 315, 320, 325) assigned to the at least one unlocker (120, 130, 140) in order to release the locked telegram as an unlocked telegram for processing by the slave subscribers (115, 125, 135, 145, 155, 160, 165, 170, 175, 180, 185) provided that the locked telegram is intended for the segment (300, 305, 310, 315, 320, 325) assigned to the at least one unlocker (120, 130, 140).