Method for synchronizing redundant operation of coupled data processing systems following an interrupt event or in response to an internal command

US5301308A · kind A · utility

Assignee

• Siemens Aktiengesellschaft · DE

Inventors

• Horst Daar · Erlangen, DE
• Herbert Barthel · Herzogenaurach, DE

Key dates

• Filing date: Apr 24, 1990
• Grant date: Apr 5, 1994
• Expiry date: Apr 24, 2010

Classification

• Technology area (CPC G): Physics
• CPC primary: G05B19/0421
• WIPO field: Control
• WIPO sector: Instruments

Abstract

The system synchronizes data processing systems coupled together using a synchronization operation that is only implemented as a function of events that necessitate synchronization. The system differentiates between the immediate synchronization of internal commands and the indirect synchronization of interrupt events. When an internal command appears, then the synchronization of the data processing systems takes place immediately after the command is executed. In the case of interrupt events, the synchronization operation takes place at defined program points such as block limits or program sections of programs so partitioned.