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Journal of Applied Sciences
  Year: 2007 | Volume: 7 | Issue: 19 | Page No.: 2904-2907
DOI: 10.3923/jas.2007.2904.2907
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Hybrid Programmable Logic Controller for Load Automation

Aamir Shahzad, Hashim Farooq, Sofia Akba, Mushtaq Yousaf, Kamran Hafeez and M. Hanif

The purpose of this study is to design a Programmable Logic Controller (PLC) to command 8-relays to control and automate ac loads via PC parallel port. In this project, the PLC is connected to the Personal Computer called hybrid PLC and this PC controls all the field ac loads via parallel printer port. Eight signals of different sequences are sent on parallel port via computer keyboard, which activate the microcontroller as inputs. Microcontroller responds according to these inputs and its user programming, which then commands 8-relays to control (on/off) different electronic appliances. Microcontroller memory makes easier to store its programming permanently. This hybrid PLC is applicable for controlling and monitoring industrial processes particularly of small to medium scale manufacturing processes and may be used for home automation as well. Parallel port is accessed by a program written in C++ language and microcontroller is programmed in assembly language. Ac load of any kind, whether resistive or inductive can be controlled with the help of this project.
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How to cite this article:

Aamir Shahzad, Hashim Farooq, Sofia Akba, Mushtaq Yousaf, Kamran Hafeez and M. Hanif, 2007. Hybrid Programmable Logic Controller for Load Automation. Journal of Applied Sciences, 7: 2904-2907.

DOI: 10.3923/jas.2007.2904.2907






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