Data transmission method, data structure, automation network and unlocker

A method for transmitting data in an automation network by telegrams, wherein the automation network comprises a master subscriber, slave subscribers and at least one unlocker connected to each other via a data-line network,

• wherein the slave subscribers are divided up into segments, each segment comprising at least one slave subscriber, wherein the master subscriber sends locked telegrams for processing by the slave subscribers, each telegram having a telegram identifier in order to assign a locked telegram to a segment,
• wherein at least one segment is assigned to the at least one unlocker,
• wherein, when the at least one unlocker receives a locked telegram, the at least one unlocker checks on the basis of the telegram identifier in the locked telegram whether the locked telegram for the segment assigned to the at least one unlocker is intended to release the locked telegram as an unlocked telegram for processing by the slave subscribers, provided that the locked telegram is intended for the segment assigned to the at least one unlocker, and
• wherein the data-line network comprises data connections between the master subscriber, the slave subscribers and a plurality of unlockers,
• wherein, when an unlocker receives an unlocked telegram from a preceding unlocker via a data connection, the telegram not being intended for the segment assigned to the unlocker, the unlocker blocks the telegram.