With invention of programmable controllers, much has changed in how an process control system is designed. Many advantages appeared. Advantages of control panel that is based on a PLC controller can be presented in few basic points :
- Compared to a conventional process control system, number of wires needed for connections is reduced by 80%
- Consumption is greatly reduced because a PLC consumes less than a bunch of relays
- Diagnostic functions of a PLC controller allow for fast and easy error detection.
- Change in operating sequence or application of a PLC controller to a different operating process can easily be accomplished by replacing a program through a console or using a PC software (not requiring changes in wiring, unless addition of some input or output device is required).
- Needs fewer spare parts
- It is much cheaper compared to a conventional system, especially in cases where a large number of I/O instruments are needed and when operational functions are complex.
- Reliability of a PLC is greater than that of an electro-mechanical relay or a timer.
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S. K. Khatib & Mr. Ritender (M/S SKR Power Engineering)
Plot No.- 656, Sub Plot No.- JC - 1, Near ITER Hotel Management College, Phase - 3, Sidheswari Nagar, Jagamara, Khandagiri, Bhubaneswar, Odisha - 751030, India
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