Patent
1994-03-16
1997-06-17
Heckler, Thomas M.
G06F 1130
Patent
active
056405146
ABSTRACT:
The present invention relates to synchronization methods for a redundantly structured automation system including at least two subsystems. According to the present invention, the sequences of machine instructions for the subsystems contain run-time queries. When the run-time queries are reached, the actual run time since the last synchronization of the subsystems is determined. However, a synchronization is only carried out when the actual run time exceeds a preselectable synchronization reference pattern. The run-time queries are always inserted then into the sequence of machine instructions when a summed run-time expected value of the machine instructions exceeds a preselectable critical time.
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Barthel Herbert
Daar Horst
Schuetz Hartmut
Heckler Thomas M.
Siemens Aktiengesellschaft
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