Patent · US Expired

Synchronization method for automation systems

US5640514A · kind A · utility

13Cited by

11References

12Claims

0Family size

Assignee

Siemens Aktiengesellschaft · DE

Inventors

Herbert Barthel · Herzogenaurach, DE
Horst Daar · Erlangen, DE
Hartmut Schuetz · Heroldsbach, DE

Key dates

Filing date	Mar 16, 1994
Grant date	Jun 17, 1997
Priority date	—
Expiry date	Mar 16, 2014

Classification

Technology area (CPC G)Physics
CPC primaryG06F11/1691
WIPO fieldControl
WIPO sectorInstruments

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.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.