Title :
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
fDate :
31 Aug-4 Sep 1998
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;
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
DOI :
10.1109/IECON.1998.722916
