NDLI: A CPLD-based safety concept for industrial applications

Content Provider	IEEE Xplore Digital Library
Author	Griessnig, G. Mader, R. Steger, C. Weiss, R.
Copyright Year	2010
Description	Author affiliation: ITI, Graz University of Technology, Austria (Steger, C.; Weiss, R.) \|\| AVL List GmbH, Austria (Griessnig, G.; Mader, R.)
Abstract	Industry demands cost-efficient approaches for the realization of uncomplex safety functions in industrial automation. Therefore new approaches need to be considered. For this purpose the implementation of safety functions in hardware using CPLDs is an option. This approach does, in contrast to microcontroller-based systems, not require the development of startup- and online tests for RAM and CPU. Therefore efforts for design, implementation and verification of these safety integrity measures can be saved as well as hardware resources for the execution of tests. Based on this idea, a CPLD-based safety concept has been elaborated that allows to realize safety functions by exclusively using CPLDs. The safety concept has been derived from normative safety requirements, functional safety requirements as well as other non-functional requirements. The safety concept comprises a CPLD-based redundant failsafe system architecture, safety integrity measures and a precise definition of the safe state and the unsafe state of possible target applications. An industrial power drive system is presented that has been enhanced with uncomplex safety functions to increase its safety integrity. These safety functions are able to avoid the application of power to an electric DC motor, if demanded. They were realized by a fail-safe system. This system adopts the CPLD-based safety concept.
Starting Page	3027
Ending Page	3032
File Size	978417
Page Count	6
File Format	PDF
ISBN	9781424463909
e-ISBN	9781424463923
DOI	10.1109/ISIE.2010.5637270
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2010-07-04
Publisher Place	Italy
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Safety Digital signal processing Monitoring CPLD safety concept industrial application power drive system fail-safe system safety function IEC 61508
Content Type	Text
Resource Type	Article

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