Method for integration of systems with only one sync domain for time of day and clock pulse synchronization into a global time of day synchronization domain

摘要

A method for synchronizing the operating clock and the timing clock of a subordinate domain of an automation network, wherein sync slaves are synchronized by a clock sync master with respect to an operating clock, a clock sync master forms part of a subordinate domain, a single synchronization message serves to synchronize the sync slaves with respect to their respective operating clock and timing clock, wherein the method comprises providing a notification of the difference between the timing clock and the operating clock using the synchronization message, and accepting this difference into the synchronization message as additional information.

主权项

1. A method for synchronizing an operating clock of a subordinate domain of an automation network with a timing clock of the subordinate domain of the automation network, the automation network comprising a plurality of sync slaves of the subordinate domain, such that the plurality of sync slaves are coordinated in time, wherein a higher-ranking time sync master of a higher-ranking domain synchronizes each of the plurality of sync slaves of the subordinate domain with respect to the timing clock of the subordinate domain of the automation network, comprising:
sending, from the higher-ranking time sync master, a first synchronization message to a clock sync master of the subordinate domain, the first synchronization message containing first information about a time of the higher-ranking time sync master; accepting, by the clock sync master, a time of the higher-ranking time sync master as a system time of the clock sync master, performing time coordination of the plurality of sync slaves by the timing clock of the subordinate domain of the automation network and a difference between the operating clock of the subordinate domain of the automation network and the timing clock of the subordinate domain of the automation network if the system time of the clock sync master is identical to the timing clock of the subordinate domain of the automation network; synchronizing the plurality of sync slaves by the clock sync master with respect to the operating clock of the subordinate domain of the automation network, a single domain-internal synchronization message serving to synchronize the plurality of sync slaves with respect to an operating clock and timing clock of each of the plurality of sync slaves of the automation network; notifying the difference between the timing clock of the subordinate domain of the automation network and the operating clock of the subordinate domain of the automation network using the single domain-internal synchronization message; accepting the difference between the timing clock of the subordinate domain of the automation network and the operating clock of the subordinate domain of the automation network using the single domain-internal synchronization message as additional information into the single domain-internal synchronization message; informing a first sync slave of the plurality of sync slaves about the operating clock of the subordinate domain of the automation network and the difference between the timing clock of the subordinate domain of the automation network and the operating clock of the subordinate domain of the automation network by the single domain-internal synchronization message from the clock sync master; and transferring the information about the operating clock of the subordinate domain of the automation network and the difference between the timing clock of the subordinate domain of the automation network and the operating clock of the subordinate domain of the automation network to a next sync slave of each of the plurality of sync slaves by the single domain-internal synchronization message from a respective preceding sync slave of the sync slaves; wherein the information supplied in the single domain-internal synchronization message about the operating clock of the subordinate domain of the automation network determines a respective operating clock of the plurality of sync slaves; wherein each respective operating clock of the plurality of sync slaves is representable as a system-intrinsic operating clock of each of the plurality of sync slaves; and wherein the subordinate domain is retained unchanged for an integration of the subordinate domain into a higher-ranking domain.