Microprocessor-controlled field device for connection to a field bus system

US7337369B2 · kind B2 · utility

Assignee

• Siemens Aktiengesellschaft · DE

Inventors

• Herbert Barthel · Herzogenaurach, DE
• Wolfgang Stripf · Karlsruhe, DE

Key dates

• Filing date: Apr 9, 2002
• Grant date: Feb 26, 2008
• Expiry date: Mar 29, 2023

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02P90/02
• WIPO field: Control
• WIPO sector: Instruments

Abstract

A microprocessor-controlled standard field device, such as a measuring sensor or an actuator, is connected to a field bus system that, in turn, is connected to, for example, a freely programmable controller. The field device is equipped with a security layer for carrying out a security proven communication. A secure and simultaneously cost-effective communication with a control device via a field bus system is made possible by implementing a security layer in, e.g., a conventional operationally proven or redundant standard field device.