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Source: www.dte.uvigo.es
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Last download on:
Tue May 21, 2013 03:22:59 PM
Short Desciption:
Abstract
In many industrial processes, an incorrect operation can lead to irreparable damage
to people, equipment, or the environment. In order to reduce risks, the electronic
control systems used in this kind of processes must comply with international
standard safety requirements
Summary:
The solutions proposed in this article are based on the implementation of safety
redundant control systems in Programmable Logic Devices (PLDs and FPGAs),
now a widely used and low cost technology. The proposed methodology for safe
controllers design is based on the combination of dynamic logic and redundant
circuits with voting capabilities. This methodology leads to low cost PLD based
control, diagnosis, and supervision systems that allow to achieve the different safety
levels established in international safety standards.
The use of Programmable Logic Devices (PLDs) instead of high-end Programmable
Logic Controllers (PLCs) adds flexibility to the design of safety-related control
systems and reduces costs, while maintaining high reliability and a good degree of
failure detection.
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"Design of safety systems with Programmable Logic"
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