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PROGRAMMABLE CONTROLLER VS COMPUTER CONTROL FOR REFRIGERATION SYSTEMS.

Author(s) : MURPHY D. A.

Type of article: Article

Summary

THE AUTHOR ARGUES THE RELATIVE MERITS OF THESE TWO CONTROL METHODS. HE CONCLUDES THAT FOR SYSTEMS USING A LIMITED NUMBER OF INPUTS AND REQUIRING NO ANTICIPATED CHANGE, THE PROGRAMMABLE CONTROLLER HAS A COST ADVANTAGE. IN LARGER AND MORE COMPLEX SYSTEMS, A DESKTOP COMPUTER CONTROL CAN BE NO MORE EXPENSIVE OR EVEN CHEAPER, AND HAS MANY USER FRIENDLY ASPECTS. THE MAIN ADVANTAGES ARE VERY EASY PRINT-OUT FACILITIES AND THE ABILITY TO INTERCONNECT WITH PHONE ALARM OR INSTRUCTION SYSTEMS. ALSO SIMPLE ALTERATIONS, SUCH AS CHANGING A DELAY TIME OR TEMPERATURE LEVEL CAN BE MADE BY A PLANT OPERATOR WITH VIRTUALLY NO UNDERSTANDING OF COMPUTER OR CONTROLLER PROGRAMMING. D.W.H.

Details

  • Original title: PROGRAMMABLE CONTROLLER VS COMPUTER CONTROL FOR REFRIGERATION SYSTEMS.
  • Record ID : 1987-1287
  • Languages: English
  • Source: Heat. Pip. Air Cond. - vol. 58 - n. 11
  • Publication date: 1986/11
  • Document available for consultation in the library of the IIR headquarters only.

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