DocumentCode :
3419578
Title :
Redundancy method used in PLC related applications
Author :
Gabor, Gianina ; Zmaranda, Doina ; Gyorodi, Cornelia ; Dale, Sanda
Author_Institution :
Dept. of Comput. Sci., Univ. of Oradea, Oradea, Romania
fYear :
2009
fDate :
July 29 2009-Aug. 1 2009
Firstpage :
119
Lastpage :
126
Abstract :
PLC related applications are more complex as far as more components are involved. If some error occurs, diagnosis can take some time, but a logical procedure will shorten the time needed to locate the fault. The probability of failure of different parts of typical PLC systems shows that 95% of PLC systems are external faults and occur on plant items such as: sensors, actuators, transducers, limit switchers, and others. The possibility of determining the validity of the data gathered from all transducers of the control system assures a way of short time fault detection. Consequently, a fault-tolerant control system must be implemented using redundant structures, representing an alternative for malfunctioning element detection. This paper presents a method used to design and implement a control system based on redundant structures. A case study for the geothermal power plant at the University of Oradea was developed. The redundant structure considered was simulated using MathLab/Simulink and analyzed using different scenarios. Finally, a possible implementation of resulting control system structure is done using a programmable logical controller (PLC).
Keywords :
control system synthesis; fault diagnosis; fault tolerance; programmable controllers; redundancy; transducers; MathLab; Simulink; control system design; fault locating; fault-tolerant control system; geothermal power plant; malfunctioning element detection; programmable logical controller related application; redundancy method; redundant structures; short time fault detection; transducers; Actuators; Control systems; Design methodology; Fault detection; Fault diagnosis; Fault tolerant systems; Programmable control; Redundancy; Sensor systems; Transducers;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Soft Computing Applications, 2009. SOFA '09. 3rd International Workshop on
Conference_Location :
Arad
Print_ISBN :
978-1-4244-5054-1
Electronic_ISBN :
978-1-4244-5056-5
Type :
conf
DOI :
10.1109/SOFA.2009.5254867
Filename :
5254867
Link To Document :
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