Author(s)

Mohammad A. K. Alia, Tariq M. Younes, Mohammad Abu Zalata

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This research is a continuation to our work which was published in [1]. Eight different timing VIs are designed and tested. These include ON-Delay, OFF-Delay, Single Shot, Retriggerable Monostable, and Accumulative software-based timers. Using hardware programmable counter/timer chip (DAQ-STC-24bit) and PCI MIO-16E-1 DAQ board, another two precise timers are designed. At the end of the paper, for illustration purposes, an electro-pneumatic drive system was developed and controlled utilizing designed on-delay timers VI functions. Results of experiment show complete coincidence between the PLC-based control and Virtual PLC-based program results.

PLC, Virtual PLC, LabVIEW, Programmable Timers

M. Alia, T. Younes and M. Zalata, "Development of Equivalent Virtual Instruments to PLC Functions and Networks," Journal of Software Engineering and Applications, Vol. 4 No. 3, 2011, pp. 172-180. doi: 10.4236/jsea.2011.43019.