An intrinsic safety PLC with a graphic programming environment

Author

Blanco, Cecilio ; Perez, Miguel A. ; Alvarez, Juan C. ; Campo, Juan Carlos ; Ferrero, Francisco J.

Author_Institution

Dept. of Electron. Eng., Oviedo Univ., Spain

Volume

3

fYear

1998

fDate

31 Aug-4 Sep 1998

Firstpage

1649

Abstract

An intrinsic safety PLC has been developed. This PLC has been built to be used in dangerous environments, such inside mines, where there are risks of explosions. A MC68000 microprocessor has been used as the processor and the PLC incorporates a security system based on the use of fiber optics and the MC68HC11E2 microcontroller. Moreover, conventional digital and analog I/O cards are used. There are two levels of programming, a textual level and a graphic level. The PLC is programmed from a personal computer through a serial port. It is programmed offline

Keywords

microcomputer applications; microcontrollers; microprocessor chips; microprogramming; programmable controllers; safety systems; I/O cards; MC68000 microprocessor; MC68HC11E2 microcontroller; dangerous environments; fiber optics; graphic programming environment; graphic programming level; intrinsic safety PLC; offline programming; personal computer; security system; serial port; textual programming level; Communication system control; Control systems; Explosions; Graphics; Microcomputers; Optical fibers; Programmable control; Programming environments; Random access memory; Safety;

fLanguage

English

Publisher

ieee

Conference_Titel

Industrial Electronics Society, 1998. IECON '98. Proceedings of the 24th Annual Conference of the IEEE

Conference_Location

Aachen

Print_ISBN

0-7803-4503-7

Type

conf

DOI

10.1109/IECON.1998.722916

Filename

722916