Two-Unit PLC System with Preventive/Corrective Maintenance and Repair
The IUP Journal of Electrical & Electronics Engineering, Vol. VII, No. 4, October 2014, pp. 65-80
Posted: 9 Jul 2017
Date Written: August 18, 2015
Abstract
The paper deals with two-unit cold standby Programmable Logic Controller (PLC) system with regular inspections, repairs and various types of maintenances by regular visiting repairmen at industry itself or at service station. From the literature, it is observed that in the past, considerations were depicted regarding the hypothetical industrial cases. It is felt that a practical industrial case may be taken up, in which practical side of the unit will be studied with utmost care and slightness. For this purpose, we have taken PLC as a unit. Here regular engineers are appointed; expert repairman can also be called upon, if required. Besides, PLC can be sent to authorized service station if required. To go deep into the matter, two types of maintenances — preventive and corrective maintenance — can be consulted. Also, various reliability parameters of a system are studied and plotted graphically.
Keywords: Programmable Logic Controller (PLC), Laplace transform, Corrective maintenance, Preventive maintenance
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