Central processing unit for a process control system

US6184904A · kind A · utility

Assignee

• Siemens Aktiengesellschaft · DE

Inventors

• Georg Trummer · Amberg, DE
• Werner Burger · Schwanau, DE

Key dates

• Filing date: Sep 28, 1993
• Grant date: Feb 6, 2001
• Expiry date: Sep 28, 2013

Classification

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

Abstract

A process system, for example a storage-programmable control, having a central unit (1) and a number of peripheral devices, for instance I/O assemblies, controller assemblies, etc., which are connected to the central unit (1) via a bus system (7). The central unit (1) includes two processor systems (2, 4) which are separate from each other, one processor system (2) processing real-time tasks and one processor system (4) processing tasks which are not time-critical. The bus system (7) is split into two separate, individual buses (7', 7") which are associated with the processor systems (2, 4). In this way, the processor systems (2, 4) are uncoupled from each other upon access to the bus system (7).