Online Self Tests for Microcontrollers in Safety Related Systems

Author

Tamandl, T. ; Preininger, P.

Author_Institution

Vienna Univ. of Technol., Vienna

Volume

1

fYear

2007

fDate

23-27 June 2007

Firstpage

137

Lastpage

142

Abstract

Nowadays it has become common practice to use microcontrollers in safety related systems. Such systems are deployed to achieve functional safety. The international standard IEC 61508 provides requirements to avoid or reduce the risk caused by these systems. The project SafetyLon aims at enhancing the local operating network (LON) to meet the requirements of IEC 61508. For achieving a defined level of integrity either highly reliable hardware with a low residual error probability has to be used or comprehensive online self tests have to be performed. The chosen standard microcontrollers must perform online self tests in order to detect as much hardware faults of the CPU internals as possible. These tests cover the testing of the volatile and non volatile memory and the CPU. All online self tests have to be tailored to the chosen microcontroller and have to meet the requirements given by IEC 61508.

Keywords

IEC standards; automatic testing; computer networks; microcontrollers; safety systems; IEC 61508; SafetyLon Project; comprehensive online self tests; local operating networks; microcontrollers; safety related systems; Automatic testing; Central Processing Unit; Hazards; IEC standards; Injuries; Microcontrollers; Performance evaluation; Safety devices; Standards development; System testing;

fLanguage

English

Publisher

ieee

Conference_Titel

Industrial Informatics, 2007 5th IEEE International Conference on

Conference_Location

Vienna

ISSN

1935-4576

Print_ISBN

978-1-4244-0851-1

Electronic_ISBN

1935-4576

Type

conf

DOI

10.1109/INDIN.2007.4384745

Filename

4384745